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CX2SA > SATDIG 02.03.20 00:27l 1241 Lines 41066 Bytes #999 (0) @ WW
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Today's Topics:
1. Re: Leo Bodnar ICOM IC-9700 Reference Injection Board
(Mark Jessop)
2. WD9EWK @ DM22/DM32 on Sunday (16 February)
(Patrick STODDARD (WD9EWK/VA7EWK))
3. Re: Leo Bodnar ICOM IC-9700 Reference Injection Board (Kevin)
4. Re: HuskySat-1: Telemetry, "FWD Power" (cjhurst@???????.???.???
5. dual band vhf/uhf antenna (Jackie Dander)
6. Re: dual band vhf/uhf antenna (Ev Tupis)
7. Re: dual band vhf/uhf antenna (Jackie Dander)
8. Thanks from new/old ham (Jackie Dander)
9. Re: dual band vhf/uhf antenna (Rick Tejera)
10. Upcoming ARISS Contact Schedule as of 2020-02-16 16:30 UTC
(aj9n@???.????
----------------------------------------------------------------------
Message: 1
Date: Sun, 16 Feb 2020 16:12:06 +1030
From: Mark Jessop <vk5qi@??????.???>
To: Kevin <wa7fwf@?????.???>
Cc: amsat-bb@?????.???
Subject: Re: [amsat-bb] Leo Bodnar ICOM IC-9700 Reference Injection
Board
Message-ID:
<CAJsuqdD1U2AYJBZmfmjrji6UXZorhpGYigMwABW3pTVEwszC8Q@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
In short, yes.
I have performed phase noise measurements on my IC-9700, with and without
injection locking. I am currently using a Leo Bodnar Mini GPSDO as the
reference, though using a MiniKits injection board (Leo wasn't selling his
at the time). I had to do this kind of locking as there was noticeable
drift when attempting 70cm EME contacts with the IC-9700 unlocked, which
was causing degradation in decode performance. With the radio locked there
are no issues.
The test equipment was a Symmetricom 5125A Phase Noise Test Set, and I was
using a 160 MHz Wenzel as a reference. The 5125A only works on input
signals up to 400 MHz, so for 70cm and 23cm I mixed the signal down to ~30
MHz using a Minicircuits LAVI-2VH, with the LO generated by a R&S SMA100B.
The rig was powered from 2x 100Ah batteries, and the GPSDOs were powered
from a 5V linear bench supply.
I tested:
- (2m/70cm/23cm) Unlocked IC-9700, transmitting for ~5 minutes to let the
drift settle as best as it can.
- (2m/70cm) IC-9700 + MiniKits Coupler board, driven with the MiniKits
GPS-9700 (+10 dBm)
- (2m/70cm/23cm) IC-9700 + MiniKits Coupler board, driven with a Leo Bodnar
Mini GPSDO (maximum drive, which is ~+10 dBm I believe)
- (2m only) IC-9700 + MiniKits Coupler board, driven with the R&S SMA100B
(+10 dBm)
Plots of the results are here: https://imgur.com/a/iFi527l
I guess the key point is that there is no degradation of transmit phase
noise observed when using any of the injection locking solutions. While I
did previously see some wide-band phase noise differences between the
MiniKits and Leo Bodnar LO's (as measured at 49.152 MHz), this doesn't
translate to a degradation at the output of the transmitter. I'm not seeing
the wide-band noise improvements when injection locked that others have
seen.
There appears to be a slight improvement in close-in phase noise when
injection locked with the GPS-9700 and Mini-GPSDO (and a big improvement
when using the SMA100B, but that sig-gen costs 20x more than the rig does),
but I wouldn't read too much into the close-in results as I only had time
to run each measurement for ~5 minutes or so. However, note that the
test-set noise floor (shaded area) is *well* below the measured results.
73
Mark VK5QI
On Sun, Feb 16, 2020 at 9:28 AM Kevin via AMSAT-BB <amsat-bb@?????.???>
wrote:
> I wonder if anyone who has all the needed equipment to test has verified
> that the output of the 9700 is still clean after this mod?
>
> In the past ext reflock boards compared the radios osc to a gps
> locked 10mhz signal and adjusted the trim voltage going to the vctcxo so
> levels were not touched, the radio was as clean or dirty as it was when
> it left the factory.
> Now with this mod (if I understand it correctly) the main osc is
> still running and they are just pumping a much stronger signal into the
> master osc area until it drowns out the original osc and the radio locks
> to it. So the question comes up are they then overdriving the osc chain
> downline and distorting? and is the original osc signal still there in
> the background now as noise?
>
> Might be a interesting project to find out.
>
> 73 Kevin wa7fwf
>
>
>
> On 2/15/2020 14:08, Bob Hammond via AMSAT-BB wrote:
> > This is a good explanation:
> >
> > "With the current firmware, users have observed frequency drift when
> using
> > narrow bandwidth modes. Using an external 10 MHz and the firmware reduces
> > the size of the frequency drifts by updating the corrections to the
> master
> > oscillator more frequently. The drift is still there,,,,, With the 49.152
> > MHz injector board and a good external 49.152 MHz GPS-locked oscillator,
> > the external oscillator locks the internal oscillator and the drift issue
> > is eliminated. The drift is probably not important on FM and most may not
> > notice the issue on SSB. But it is important to eliminate the drift if
> you
> > are using JT65 and similar narrow bandwidth modes."
> >
> > Copied from the Facebook ic-9700 group and a post by Peter Freeman in
> reply
> > to Tim Goodrich's question:
> > https://www.facebook.com/groups/163460540873662/
> >
> > Bob W7OTJ
> >
> > On Sat, Feb 15, 2020 at 1:53 PM Bob Hammond <propgrinder@?????.???>
> wrote:
> >
> >> Eric,
> >>
> >> I found much information on the design and benefits of a GPSDO and
> >> reference board for the IC-9700 here:
> >>
> >> https://www.minikits.com.au/gps9700#wspr
> >>
> >> The Mini-Kits version is only slightly different than the Leo Bodnar
> >> version however the designs are virtually identical.
> >>
> >>
> >>
>
http://www.leobodnar.com/shop/index.php?main_page=product_info&products_id=301
> >>
> >>
>
http://www.leobodnar.com/shop/index.php?main_page=product_info&products_id=352
> >>
> >> Bob W7OTJ
> >>
> >> On Sat, Feb 15, 2020 at 8:16 AM kd8drg.admin--- via AMSAT-BB <
> >> amsat-bb@?????.???> wrote:
> >>
> >>> I was wondering what the advantage is for using this board vs the
> >>> standard 10Mhz external reference on the 9700?
> >>>
> >>> 73
> >>> Eric
> >>> WD8KNL
> >>> _______________________________________________
> >>> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> >>> to all interested persons worldwide without requiring membership.
> >>> Opinions expressed
> >>> are solely those of the author, and do not reflect the official views
> of
> >>> AMSAT-NA.
> >>> Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> >>> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
> >>>
> > _______________________________________________
> > Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> > to all interested persons worldwide without requiring membership.
> Opinions expressed
> > are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> > Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> > Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 2
Date: Sun, 16 Feb 2020 06:32:42 +0000
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@??????.???>
To: AMSAT <amsat-bb@?????.???>
Subject: [amsat-bb] WD9EWK @ DM22/DM32 on Sunday (16 February)
Message-ID:
<CAN6TEUd-5BhcryUj7ZCNR_aAzR6a4Oau7h3bYRzDk81Tacmp_A@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Hi!
On my way home Sunday (16 February), I will make a stop on the
DM22/DM32 grid boundary about 25 miles/40km east of Yuma, Arizona,
near the I-8 freeway. I will work the AO-92 and AO-91 passes that
come by starting around 1700 UTC, and may be able to try the XW-2A
passes before then. I don't know how long I can stay out there to
work other passes, but I will post updates on my @?????? Twitter
account. If you do not use Twitter, you can view my tweets in a
web browser at:
http://twitter.com/WD9EWK
APRS coverage appears to be working east of Yuma, and I hope to show
up as WD9EWK-9 once I leave the Yuma area:
http://aprs.fi/WD9EWK-9
I will upload QSOs made on the DM22/DM32 line to Logbook of the World
when I return home. If anyone would like a QSL card for a contact,
please e-mail me the QSO details. No need to first send me a card or
an SASE, before I send out a card.
Thanks, and 73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
Twitter: @?????? or http://twitter.com/WD9EWK
------------------------------
Message: 3
Date: Sat, 15 Feb 2020 23:08:28 -0800
From: Kevin <wa7fwf@?????.???>
To: Mark Jessop <vk5qi@??????.???>
Cc: amsat-bb@?????.???
Subject: Re: [amsat-bb] Leo Bodnar ICOM IC-9700 Reference Injection
Board
Message-ID: <c93edb11-4968-96c1-766a-791d493ff331@?????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
Thank You Mark for the answer and the detailed notes.
73 Kevin
On 2/15/2020 21:42, Mark Jessop wrote:
> In short, yes.
>
> I have performed phase noise measurements on my IC-9700, with and
> without injection locking. I am currently using a Leo Bodnar Mini
> GPSDO as the reference, though using a MiniKits injection board (Leo
> wasn't selling his at the time). I had to do this kind of locking as
> there was noticeable drift when attempting 70cm EME contacts with the
> IC-9700 unlocked, which was causing degradation in decode performance.
> With the radio?locked there are no issues.
>
> The test equipment was a Symmetricom 5125A Phase Noise Test Set, and I
> was using a 160 MHz Wenzel as a reference. The 5125A only works on
> input signals up to 400 MHz, so for 70cm and 23cm I mixed the signal
> down to ~30 MHz using a Minicircuits LAVI-2VH, with the LO generated
> by a R&S SMA100B. The rig was powered from 2x 100Ah batteries, and the
> GPSDOs were powered from a 5V linear bench supply.
>
> I tested:
> - (2m/70cm/23cm) Unlocked IC-9700, transmitting for ~5 minutes to let
> the drift settle as best as it can.
> - (2m/70cm) IC-9700 + MiniKits Coupler board, driven with the MiniKits
> GPS-9700 (+10 dBm)
> - (2m/70cm/23cm) IC-9700 + MiniKits Coupler board, driven with a Leo
> Bodnar Mini GPSDO (maximum drive, which is ~+10 dBm I believe)
> - (2m only) IC-9700 + MiniKits Coupler board, driven with the R&S
> SMA100B (+10 dBm)
>
> Plots of the results are here: https://imgur.com/a/iFi527l
>
> I guess the key point is that there is no degradation of transmit
> phase noise observed when using any of the injection locking
> solutions. While I did previously see some wide-band phase noise
> differences between the MiniKits and Leo Bodnar LO's (as measured at
> 49.152 MHz), this doesn't translate to a degradation at the output of
> the transmitter. I'm not seeing the wide-band noise improvements when
> injection locked that others have seen.
>
> There appears to be a slight improvement in close-in phase noise when
> injection locked with the GPS-9700 and Mini-GPSDO (and a big
> improvement when using the SMA100B, but that sig-gen costs 20x more
> than the rig does), but I wouldn't read too much into the close-in
> results as I only had time to run each measurement for ~5 minutes or
> so. However, note that the test-set noise floor (shaded area) is
> *well* below the measured results.
>
> 73
> Mark VK5QI
>
> On Sun, Feb 16, 2020 at 9:28 AM Kevin via AMSAT-BB <amsat-bb@?????.???
> <mailto:amsat-bb@?????.???>> wrote:
>
> I wonder if anyone who has all the needed equipment to test has
> verified
> that the output of the 9700 is still clean after this mod?
>
> ??? In the past ext reflock boards compared the radios osc to a gps
> locked 10mhz signal and adjusted the trim voltage going to the
> vctcxo so
> levels were not touched, the radio was as clean or dirty as it was
> when
> it left the factory.
> ?? Now with this mod (if I understand it correctly) the main osc is
> still running and they are just pumping a much stronger signal
> into the
> master osc area until it drowns out the original osc and the radio
> locks
> to it.? So the question comes up are they then overdriving the osc
> chain
> downline and distorting? and is the original osc signal still
> there in
> the background now as noise?
>
> Might be a interesting project to find out.
>
> 73 Kevin wa7fwf
>
>
>
> On 2/15/2020 14:08, Bob Hammond via AMSAT-BB wrote:
> > This is a good explanation:
> >
> > "With the current firmware, users have observed frequency drift
> when using
> > narrow bandwidth modes. Using an external 10 MHz and the
> firmware reduces
> > the size of the frequency drifts by updating the corrections to
> the master
> > oscillator more frequently. The drift is still there,,,,, With
> the 49.152
> > MHz injector board and a good external 49.152 MHz GPS-locked
> oscillator,
> > the external oscillator locks the internal oscillator and the
> drift issue
> > is eliminated. The drift is probably not important on FM and
> most may not
> > notice the issue on SSB. But it is important to eliminate the
> drift if you
> > are using JT65 and similar narrow bandwidth modes."
> >
> > Copied from the Facebook ic-9700 group and a post by Peter
> Freeman in reply
> > to Tim Goodrich's question:
> > https://www.facebook.com/groups/163460540873662/
> >
> > Bob W7OTJ
> >
> > On Sat, Feb 15, 2020 at 1:53 PM Bob Hammond
> <propgrinder@?????.??? <mailto:propgrinder@?????.???>> wrote:
> >
> >> Eric,
> >>
> >> I found much information on the design and benefits of a GPSDO and
> >> reference board for the IC-9700 here:
> >>
> >> https://www.minikits.com.au/gps9700#wspr
> >>
> >> The Mini-Kits version is only slightly different than the Leo
> Bodnar
> >> version however the designs are virtually identical.
> >>
> >>
> >>
>
http://www.leobodnar.com/shop/index.php?main_page=product_info&products_id=301
> >>
> >>
>
http://www.leobodnar.com/shop/index.php?main_page=product_info&products_id=352
> >>
> >> Bob W7OTJ
> >>
> >> On Sat, Feb 15, 2020 at 8:16 AM kd8drg.admin--- via AMSAT-BB <
> >> amsat-bb@?????.??? <mailto:amsat-bb@?????.???>> wrote:
> >>
> >>> I was wondering what the advantage is for using this board vs the
> >>> standard 10Mhz external reference on the 9700?
> >>>
> >>> 73
> >>> Eric
> >>> WD8KNL
> >>> _______________________________________________
> >>> Sent via AMSAT-BB@?????.??? <mailto:AMSAT-BB@?????.???>.
> AMSAT-NA makes this open forum available
> >>> to all interested persons worldwide without requiring membership.
> >>> Opinions expressed
> >>> are solely those of the author, and do not reflect the
> official views of
> >>> AMSAT-NA.
> >>> Not an AMSAT-NA member? Join now to support the amateur
> satellite program!
> >>> Subscription settings:
> https://www.amsat.org/mailman/listinfo/amsat-bb
> >>>
> > _______________________________________________
> > Sent via AMSAT-BB@?????.??? <mailto:AMSAT-BB@?????.???>.
> AMSAT-NA makes this open forum available
> > to all interested persons worldwide without requiring
> membership. Opinions expressed
> > are solely those of the author, and do not reflect the official
> views of AMSAT-NA.
> > Not an AMSAT-NA member? Join now to support the amateur
> satellite program!
> > Subscription settings:
> https://www.amsat.org/mailman/listinfo/amsat-bb
>
> _______________________________________________
> Sent via AMSAT-BB@?????.??? <mailto:AMSAT-BB@?????.???>. AMSAT-NA
> makes this open forum available
> to all interested persons worldwide without requiring membership.
> Opinions expressed
> are solely those of the author, and do not reflect the official
> views of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 4
Date: Sun, 16 Feb 2020 17:55:45 +1030
From: <cjhurst@???????.???.??>
To: "'Burns Fisher'" <wb1fj-bb@??????.??>, "'Mike Lucas'"
<documike@???????.???>
Cc: amsat-bb@?????.???
Subject: Re: [amsat-bb] HuskySat-1: Telemetry, "FWD Power"
Message-ID: <003401d5e49a$50b8c300$f22a4900$@???????.???.??>
Content-Type: text/plain; charset="us-ascii"
Burns and Mike,
My telemetry downloads suggest back on the 1st February it was around 125
milli-watts.
On the 13 February it had been running 75 milli-watts for some time.
Then on the 14th February it dropped to 13 milli-watts.
May explain why it has been tough going the last two days.
All days quoted are GMT days.
73 Colin VK5HI.
-----Original Message-----
From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of Burns Fisher via
AMSAT-BB
Sent: Sunday, 16 February 2020 09:06
To: Mike Lucas <documike@???????.???>
Cc: AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] HuskySat-1: Telemetry, "FWD Power"
Could you take a look at the "measurements" page on the HuskySat tab and
click on "RF Power" to get a graph of the power that you have been
receiving? Mine varies between about -77.5dBm and about 60dBm, (of course
it changes during a pass) but I don't see much of a difference in the last
day or 2.
Thanks...
On Sat, Feb 15, 2020 at 4:50 PM Mike Lucas via AMSAT-BB <amsat-bb@?????.???>
wrote:
> This concurs with my observations the past couple of days also.
>
> -----Original Message-----
> From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of JoAnne K9JKM
> via AMSAT-BB
> Sent: Saturday, February 15, 2020 1:39 PM
> To: amsat-bb@?????.???
> Subject: Re: [amsat-bb] HuskySat-1: Telemetry, "FWD Power"
>
> Hi Chris and Roy,
>
> > ... we can't see a difference in the received signal > strength on
> the ground, but any independent validation of that is > greatfully
received.
>
> Subjective observation is that my received signal seemed weaker for
> the past
> 2 or so days. The antenna I'm using is a 7 element yagi on 435.800 at
> 20 degrees fixed elevation on a TV rotor. I've only been able to
> capture fewer than 50% of the packets compared with reception earlier in
the week.
>
> I live on a 100% wooded lot (no leaves since its winter) but all the
> trees are frosted ala winter wonderland style from passing weather
> systems since last Thursday. The trees introduce a lot of variability
> in my received signal depending on which tree I'm pointed at. But my
> received signal on
> 435.800 has been noticeably lower even at the "good"
> patches of sky.
>
> My HuskySat telemetry at 2125Z said Forward Power = 13.4 mW.
>
> --
> 73 de JoAnne K9JKM
> k9jkm@?????.???
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership.
> Opinions expressed are solely those of the author, and do not reflect
> the official views of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership.
> Opinions expressed are solely those of the author, and do not reflect
> the official views of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
_______________________________________________
Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available to all
interested persons worldwide without requiring membership. Opinions
expressed are solely those of the author, and do not reflect the official
views of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 5
Date: Sun, 16 Feb 2020 07:07:26 -0500
From: Jackie Dander <shorenicehere@?????.???>
To: amsat-bb@?????.???
Subject: [amsat-bb] dual band vhf/uhf antenna
Message-ID:
<CAHHZQ2=8GhfZ0XSwNPTtoH12jTUJSMVDG0PQX2yhADDa=SRk3Q@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
I built the combination dual band 2meter/70cm antenna found at WA5VJB's
webpages. I chose the 5 elements on UHF forward and 2 elements on VHF rear.
All elements are in the same plane.
I now read elsewhere that in-same-plane uhf/vhf elements can interfere with
each other. I visited the Arrow website and see their LEO antennas are
opposing for uhf/vhf.
My question is if i made a mistake building the uni-plane version? Why did
WA5VJB has such success?
------------------------------
Message: 6
Date: Sun, 16 Feb 2020 12:30:07 +0000 (UTC)
From: Ev Tupis <w2ev@?????.???>
To: AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] dual band vhf/uhf antenna
Message-ID: <721400122.2631867.1581856207563@????.?????.???>
Content-Type: text/plain; charset=UTF-8
Hi Jackie,
Same-plane antennas work nicely, as long as they are designed with that in
mind. See multi-band same-plane yagi examples in the HF world.? Kent is a
skilled designer who both engineers *and* pretests before publication.
Simply interlacing antenna elements for different bands without taking into
account their mutual interaction invites problems.
Arrow gets around that by placing different bands in different planes.
Ev, W2EV
On Sunday, February 16, 2020, 7:08:34 AM EST, Jackie Dander via AMSAT-BB
<amsat-bb@?????.???> wrote:
I built the combination dual band 2meter/70cm antenna found at WA5VJB's
webpages. I chose the 5 elements on UHF forward and 2 elements on VHF rear.
All elements are in the same plane.
I now read elsewhere that in-same-plane uhf/vhf elements can interfere with
each other. I visited the Arrow website and see their LEO antennas are
opposing for uhf/vhf.
My question is if i made a mistake building the uni-plane version? Why did
WA5VJB has such success?
_______________________________________________
Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 7
Date: Sun, 16 Feb 2020 10:58:34 -0500
From: Jackie Dander <shorenicehere@?????.???>
To: Ev Tupis <w2ev@?????.???>
Cc: AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] dual band vhf/uhf antenna
Message-ID:
<CAHHZQ2k2zVwXtsf_jj81A87UebqnPkEecVjvLoV65nDEsvJz_Q@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
thanks for your reply.
Yes, Kent's success is evidence that if I copied his yagi plans properly I
should do well.
I have used my built yagi to listen in on AO-91 and AO-92 (QSL attempts by
others) as well as NOAA-18, 19 ( just signals).
I noticed, by experiments, that I could pick up AO-92 with just my HT and
it's rubber duck antenna better than with my yagi. Still learning......
On Sunday, February 16, 2020, Ev Tupis via AMSAT-BB <amsat-bb@?????.???>
wrote:
> Hi Jackie,
> Same-plane antennas work nicely, as long as they are designed with that in
> mind. See multi-band same-plane yagi examples in the HF world. Kent is a
> skilled designer who both engineers *and* pretests before publication.
>
> Simply interlacing antenna elements for different bands without taking
> into account their mutual interaction invites problems.
> Arrow gets around that by placing different bands in different planes.
>
> Ev, W2EV
>
>
> On Sunday, February 16, 2020, 7:08:34 AM EST, Jackie Dander via
> AMSAT-BB <amsat-bb@?????.???> wrote:
>
> I built the combination dual band 2meter/70cm antenna found at WA5VJB's
> webpages. I chose the 5 elements on UHF forward and 2 elements on VHF rear.
> All elements are in the same plane.
> I now read elsewhere that in-same-plane uhf/vhf elements can interfere with
> each other. I visited the Arrow website and see their LEO antennas are
> opposing for uhf/vhf.
> My question is if i made a mistake building the uni-plane version? Why did
> WA5VJB has such success?
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 8
Date: Sun, 16 Feb 2020 11:14:05 -0500
From: Jackie Dander <shorenicehere@?????.???>
To: AMSAT BB <amsat-bb@?????.???>
Subject: [amsat-bb] Thanks from new/old ham
Message-ID:
<CAHHZQ2kXaKkVLX8vk3cMWSSa7ZBL3cdKMuSKRR+dC+fy_XGnZA@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
To the several welcoming responses to my newbie question recently, a big
thank you!
I've had license a while but only with the satellite study, AMSAT
website, YouTube (Space Comms) and my backyard trials have I gotten
the "bug."
Also, I have seen the AMSAT membership offer and was trying to find a list of
benefits to membership such as this old link:
2018/04PDF
Join Amateur Radio in Space .. Join AMSAT
(tri-fold brochure)
Not that it is necessary, but to new people like myself, we like to be sold
to.
Thanks again.
Isaac
------------------------------
Message: 9
Date: Sun, 16 Feb 2020 09:15:38 -0700
From: "Rick Tejera" <SaguaroAstro@???.???>
To: "'Jackie Dander'" <shorenicehere@?????.???>, "'AMSAT'"
<amsat-bb@?????.???>
Subject: Re: [amsat-bb] dual band vhf/uhf antenna
Message-ID: <007b01d5e4e4$56194230$024bc690$@???.???>
Content-Type: text/plain; charset="us-ascii"
Jackie,
I built mine10 years ago and it has served me well. I earned my VUCC
Satellite with it. As someone else said, it was designed with multi bands
in mind.
It's a great design. I built mine for under $20.00. the biggest expense was
the shipping for the caps for the diplexer, which couldn't be sourced
locally.
Get out and make some Q's
73
Rick Tejera (K7TEJ)
Saguaro Astronomy Club
www.saguaroastro.org
Thunderbird Amateur Radio Club
www.W7TBC.org
-----Original Message-----
From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of Jackie Dander via
AMSAT-BB
Sent: Sunday, February 16, 2020 5:07 AM
To: amsat-bb@?????.???
Subject: [amsat-bb] dual band vhf/uhf antenna
I built the combination dual band 2meter/70cm antenna found at WA5VJB's
webpages. I chose the 5 elements on UHF forward and 2 elements on VHF rear.
All elements are in the same plane.
I now read elsewhere that in-same-plane uhf/vhf elements can interfere with
each other. I visited the Arrow website and see their LEO antennas are
opposing for uhf/vhf.
My question is if i made a mistake building the uni-plane version? Why did
WA5VJB has such success?
_______________________________________________
Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available to all
interested persons worldwide without requiring membership. Opinions
expressed are solely those of the author, and do not reflect the official
views of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 10
Date: Sun, 16 Feb 2020 16:21:56 +0000 (UTC)
From: aj9n@???.???
To: amsat-bb@?????.???
Subject: [amsat-bb] Upcoming ARISS Contact Schedule as of 2020-02-16
16:30 UTC
Message-ID: <250496522.2642111.1581870116623@????.?????.???>
Content-Type: text/plain; charset=UTF-8
Upcoming ARISS Contact Schedule as of 2020-02-16 16:30 UTC
?
Quick list of scheduled contacts and events:
?
Maple Dale Elementary School, Cincinnati, OH, direct via K8SCH
The ISS callsign is presently scheduled to be NA1SS
The scheduled astronaut is Drew Morgan KI5AAA
Contact is go for: Thu 2020-02-20 18:20:28 UTC 48 deg
Watch for live stream at https://facebook.com/ohkyinars (***)
?
?
The ARISS webpage is at https://www.ariss.org/ ???
Note that there are links to other ARISS websites from this site.
?
The main page for Applying to Host a Scheduled Contact may be found at
https://www.ariss.org/apply-to-host-an-ariss-contact.html ???
ARISS Contact Applications (United States)
?
?
Note, all times are approximate. ?It is recommended that you do your own
orbital prediction?or start listening about 10 minutes before the listed
time.
All dates and times listed follow International Standard ISO 8601 date and
time format YYYY-MM-DD HH:MM:SS
?
The complete schedule page has been updated as of?2020-02-16 16:30 UTC. (***)
Here you will find a listing of all scheduled?school contacts, and
questions, other ISS related websites, IRLP and Echolink websites, and
instructions for any contact that may be streamed live.
?
https://www.amsat.org/amsat/ariss/news/arissnews.rtf
https://www.amsat.org/amsat/ariss/news/arissnews.txt
?
?
The successful school list has been updated as of 2020-02-08 03:30 UTC.
https://www.amsat.org/amsat/ariss/news/Successful_ARISS_schools.rtf
?
?
?
The ARISS webpage is at https://www.ariss.org/ ???
Note that there are links to other ARISS websites from this site.
?
The main page for Applying to Host a Scheduled Contact may be found at
https://www.ariss.org/apply-to-host-an-ariss-contact.html ???
?
ARISS Contact Applications (United States)
?
The ARISS webpage is at https://www.ariss.org/ ???
Note that there are links to other ARISS websites from this site.
?
?
Message to US Educators
?
Amateur Radio on the International Space Station?
?
Contact Opportunity?
?
Call for Proposals?
?
Upcoming Proposal Window is February 1, 2020 to March 31, 2020
?
The Amateur Radio on the International Space Station (ARISS) Program is
seeking formal and informal education institutions and organizations,
individually or working together, to host an Amateur Radio contact with a
crew member on board the ISS.? ARISS is happy to announce a proposal window
will open February 1, 2020 for contacts that would be held between January
1, 2021 and June 30, 2021. Crew scheduling and ISS orbits will determine the
exact contact dates. To maximize these radio contact opportunities, ARISS is
looking for organizations that will draw large numbers of participants and
integrate the contact into a well-developed education plan.?
?
The proposal window for contacts between January 1, 2021 and June 30, 2021
will open on February 1, 2020 and close on March 31, 2020.? Proposal
information and documents can be found at www.ariss.org. Two ARISS
Introductory Webinar sessions will be held on November 7, 2019. The first is
at 6:00 PM ET and the second is at 9:00 PM ET. The same material will be
covered during both sessions, so choose the session that best fits your
schedule. The Eventbrite link to sign up
is?https://ariss-introductory-webinar-fall-2019.eventbrite.com?.
?
The Opportunity?
?
Crew members aboard the International Space Station will participate in
scheduled Amateur Radio contacts. These radio contacts are approximately 10
minutes in length and allow students to interact with the astronauts through
a question-and-answer session.?
?
An ARISS contact is a voice-only communication opportunity via Amateur Radio
between astronauts and cosmonauts aboard the space station and classrooms
and communities. ARISS contacts afford education audiences the opportunity
to learn firsthand from astronauts what it is like to live and work in space
and to learn about space research conducted on the ISS. Students also will
have an opportunity to learn about satellite communication, wireless
technology, and radio science. Because of the nature of human spaceflight
and the complexity of scheduling activities aboard the ISS, organizations
must demonstrate flexibility to accommodate changes in dates and times of
the radio contact.?
?
Amateur Radio organizations around the world with the support of NASA and
space agencies in Russia, Canada, Japan and Europe present educational
organizations with this opportunity. The ham radio organizations' volunteer
efforts provide the equipment and operational support to enable
communication between crew on the ISS and students around the world using
Amateur Radio.??
?
More Information
?
For proposal information and more details such as expectations, proposal
guidelines and proposal form, and dates and times of Information Webinars,
go to www.ariss.org.
?
Please direct any questions to?ariss.us.education@?????.???.?
?
About ARISS:
?
Amateur Radio on the International Space Station (ARISS) is a cooperative
venture of international amateur radio societies and the space agencies that
support the International Space Station (ISS).? In the United States,
sponsors are the Radio Amateur Satellite Corporation (AMSAT), the American
Radio Relay League (ARRL), the ISS National Lab and National Aeronautics and
Space Administration (NASA). The primary goal of ARISS is to promote
exploration of science, technology, engineering, and mathematics (STEAM)
topics by organizing scheduled contacts via amateur radio between crew
members aboard the ISS and students in classrooms or public forms. Before
and during these radio contacts, students, educators, parents, and
communities learn about space, space technologies, and amateur radio. For
more information, see www.ariss.org.
?
******************************************************************************
**
ARISS Contact Applications (Europe, Africa and the Middle East)
?
Schools and Youth organizations in Europe, Africa and the Middle East
interested in setting up an ARISS radio contact with an astronaut on board
the International Space Station are invited to submit an application from
September to October and from February to April.
Please refer to details and the application form at
www.ariss-eu.org/school-contacts.? Applications should be addressed by email
to:? school.selection.manager@????????.???
?
ARISS Contact Applications (Canada, Central and South America, Asia and
Australia and Russia)
?
Organizations outside the United States can apply for an ARISS contact by
filling out an application.? Please direct questions to the appropriate
regional representative listed below. If your country is not specifically
listed, send your questions to the nearest ARISS Region listed. If you are
unsure which address to use, please send your question to the ARISS-Canada
representative; they will forward your question to the appropriate
coordinator.
?
For the application, go to:? https://www.ariss.org/ariss-application.html.
ARISS-Canada and the Americas, except USA: Steve McFarlane, VE3TBD email to:
ve3tbd@?????.???
ARISS-Japan, Asia, Pacific and Australia: Satoshi Yasuda, 7M3TJZ email to:
ariss@???????.???? Japan Amateur Radio League (JARL) https://www.jarl.org/
ARISS-Russia: Soyuz Radioljubitelei Rossii (SRR) https://srr.ru/
?
?
******************************************************************************
ARISS is always glad to receive listener reports for the above contacts.?
ARISS thanks everyone in advance for their assistance.? Feel free to send
your reports to aj9n@?????.??? or aj9n@???.???.
?
Listen for the ISS on the downlink of 145.8? MHz.
?
******************************************************************************
*
?
All ARISS contacts are made via the Kenwood radio unless otherwise noted.
?
******************************************************************************
*
Several of you have sent me emails asking about the RAC ARISS website and
not being able to get in. ?That has now been changed to https://www.ariss.org/
?
Note that there are links to other ARISS websites from this site.
?
****************************************************************************
Looking for something new to do?? How about receiving DATV from the ISS??
Please note that the HamTV system has been brought back to earth for
troubleshooting.? Please monitor ARISS-EU or ARISS-ON for the very latest
news on the troubleshooting efforts.?
?
If interested, then please go to the ARISS-EU website for complete details.?
Look for the buttons indicating Ham Video.????????????
?
http://www.ariss-eu.org/
?
If you need some assistance, ARISS mentor Kerry N6IZW, might be able to
provide some insight.? Contact Kerry at kbanke@?????????.???
?
?
The HamTV webpage:? https://www.amsat-on.be/hamtv-summary/
?
?
****************************************************************************
ARISS congratulations the following mentors who have now mentored over 100
schools:
?
Francesco IK?WGF with 140
Satoshi 7M3TJZ with 138
Sergey RV3DR with 132
Gaston ON4WF with 123
?
****************************************************************************
The webpages listed below were all reviewed for accuracy. Out of date
webpages were removed, and new ones have been added.? If there are additional
ARISS websites I need to know about, please let me know.
?
?
?
Total number of ARISS ISS to earth school events is 1380.
Each school counts as 1 event.??????????????????????????????????
Total number of ARISS ISS to earth school contacts is 1313.
Each contact may have multiple schools sharing the same time slot.
Total number of ARISS supported terrestrial contacts is 48.
?
A complete year by year breakdown of the contacts may be found in the
file.
https://www.amsat.org/amsat/ariss/news/arissnews.rtf
?
Please feel free to contact me if more detailed statistics are needed.
?
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
The following US states and entities have never had an ARISS contact:
South Dakota, Wyoming, American?Samoa, Guam, Northern Marianas Islands, and
the Virgin Islands.
?
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
?
QSL information may be found at:
https://www.ariss.org/qsl-cards.html
?
ISS callsigns: DP?ISS, IR?ISS, NA1SS, OR4ISS, RS?ISS
?
****************************************************************************
Frequency chart for packet, voice, and crossband repeater modes showing
Doppler correction as of 2005-07-29 04:00 UTC
https://www.amsat.org/amsat/ariss/news/ISS_frequencies_and_Doppler_correction.
rtf
Check out the Zoho reports of the ARISS contacts
?
https://reports.zoho.com/ZDBDataSheetView.cc?DBID=412218000000020415
****************************************************************************
?
Exp. 60 on orbit
Drew Morgan KI5AAA
?
Exp. 61 on orbit
Oleg Skripochka
Jessica Meir
?
****************************************************************************
73,
Charlie?Sufana AJ9N
One of the ARISS operation team mentors
?
?
?
?
------------------------------
Subject: Digest Footer
_______________________________________________
Sent via amsat-bb@?????.???.
AMSAT-NA makes this open forum available to all interested persons worldwide
without requiring membership. Opinions expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT member? Join now to support the amateur satellite program!
https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 15, Issue 47
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