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CX2SA > SATDIG 03.03.17 07:26l 734 Lines 27481 Bytes #999 (0) @ WW
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Sent: 170303/0520Z @:CX2SA.SAL.URY.SOAM #:1534 [Salto] FBB7.00e $:AMSATBB1261
From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. EL89 tomorrow (Matthew Stevens)
2. Re: Still trying to decode NO-84 (Mark Lunday)
3. Re: Nayif-1 (Ray Hoad)
4. Re: Still trying to decode NO-84 (Mark Lunday)
5. Re: Shack re-wiring: RTL-SDR options? (Jim Jerzycke)
6. Re: Shack re-wiring: RTL-SDR options? (Greg D)
7. Re: Shack re-wiring: RTL-SDR options? (Mac A. Cody)
8. Re: Shack re-wiring: RTL-SDR options? (Scott)
9. Re: Shack re-wiring: RTL-SDR options? (Jim Jerzycke)
----------------------------------------------------------------------
Message: 1
Date: Thu, 2 Mar 2017 21:01:30 -0500
From: Matthew Stevens <matthew@xxxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] EL89 tomorrow
Message-ID: <1ADB1D19-66D0-4E7A-8D6E-1DF61B410440@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
I'll be in EL89 tomorrow morning on the ~1700z FO29 pass if anyone needs it,
fixed uplink around 145.930. Afterwards, I'll try the 1? AO-7 pass towards
EU, at 145.938.
73,
- Matthew KK4FEM
Sent from my iPhone
------------------------------
Message: 2
Date: Fri, 3 Mar 2017 02:36:12 +0000
From: Mark Lunday <wd4elg@xxxxxxx.xxx>
To: Fer <mhz4464@xxxxx.xxx>, Mark Lunday <wd4elg@xxxxxxx.xxx>, AMSAT
BB <amsat-bb@xxxxx.xxx>, Paul Stoetzer <n8hm@xxxx.xxx>, Robert
Bruninga <bruninga@xxxx.xxx>
Subject: Re: [amsat-bb] Still trying to decode NO-84
Message-ID:
<CO2PR06MB491299A3CEA1DF8207D894C952B0@xxxxxxxxxxxx.xxxxxxxx.xxxx.xxxxxxx.xxx>
Content-Type: text/plain; charset="utf-8"
FINALLY! I am not losing my mind.
Fer sees the same thing that I see on receive! Multiple harmonics signals
in the passband on RX! Is that what it is supposed to look like? I am
expecting a single PSK31 trace like what I see on HF?.how will multiple
harmonics be decoded sing FLDIGI? Sorry if I am wrong about this, but
that?s what an overmodulated AFSK BPSK signal looks like on HF.
Mark Lunday, WD4ELG
Greensboro, NC FM06be
wd4elg@xxxx.xxx
http://wd4elg.blogspot.com
SKCC #16439 FISTS #17972
From: Fer [mailto:mhz4464@xxxxx.xxxx
Sent: Thursday, March 02, 2017 10:25 AM
To: Mark Lunday; AMSAT BB; Paul Stoetzer; Robert Bruninga
Subject: Re: [amsat-bb] Still trying to decode NO-84
I am trying too to activate NO-84, 50w on 28.120 MHz with vertical antenna
or dipole with FLDIGI (saw no difference, still weak), good downlink signal
on UHF with SDR-14+SpectraVue as panadapter at 10.7 MHz, beacon decoded in
FLDIGI, my weak signal sometime decoded, strong doppler on my signal
despite I correct both with orbitron/wispdde using only fresh keps and GPS
computer sync clock.
Any idea?
73 Fer IW1DTU
here some screenshoot link to dropbox
https://www.dropbox.com/s/ec2i14l62u4ij3w/NO-84%202%20mar17%20uno.jpg?dl=0
https://www.dropbox.com/s/l1k3a3h8atyys5l/NO-84%202mar17%20due.jpg?dl=0
------------------------------
Message: 3
Date: Thu, 2 Mar 2017 21:09:13 -0600
From: "Ray Hoad" <ray.hoad@xxxxxxxx.xxx>
To: "'Paul Stoetzer'" <n8hm@xxxx.xxx>, "'Richard Tejera'"
<Saguaroastro@xxx.xxx>
Cc: 'AMSAT' <amsat-bb@xxxxx.xxx>, "'APBIDDLE@xxxxxxx.xxxxx
<APBIDDLE@xxxxxxx.xxx>, 'Red Willoughby' <red@xxxxxxxxxxxxx.xxx>
Subject: Re: [amsat-bb] Nayif-1
Message-ID: <001901d293cb$89ad3600$9d07a200$@xxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Opps! I missed changing it this week.
Nayif-1 is the last TLE in the list. You can edit it to EO-88 this week and
I will change next week.
Ray Hoad
WA5QGD
Orbital Elements Manager
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of Paul
Stoetzer
Sent: Thursday, March 2, 2017 17:16
To: Richard Tejera <Saguaroastro@xxx.xxx>
Cc: AMSAT <amsat-bb@xxxxx.xxx>; APBIDDLE@xxxxxxx.xxxx Red Willoughby
<red@xxxxxxxxxxxxx.xxx>
Subject: Re: [amsat-bb] Nayif-1
Celestrak has it as Nayif-1 (EO-88) now. AMSAT should have as EO-88
with tonight's release.
73,
Paul, N8HM
On Thu, Mar 2, 2017 at 6:10 PM, Richard Tejera <Saguaroastro@xxx.xxx> wrote:
> When will it show as EO-88 the keps? I'm still seeing Nayif-1..
>
> Rick Tejera K7TEJ
> Saguaro Astronomy Club
> www.SaguaroAstro.org
> Thunderbird Amateur Radio Club
> www.w7tbc.org
>
> On March 2, 2017, at 08:00, Alan <wa4sca@xxxxx.xxx> wrote:
>
> The satellite formerly known as Nayif-1 is now EO-88.
>
> 73s,
>
> Alan
> WA4SCA
>
>
> <-----Original Message-----
> <From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of Red
> <Willoughby
> <Sent: Thursday, March 02, 2017 08:48 AM
> <To: amsat-bb@xxxxx.xxx
> <Subject: [amsat-bb] Nayif-1
> <
> <I see it listed at the top of the colorful matrix on amsat.org/status,
> <but it does not seem to appear in the Select Satellite dropdown box for
> <posting reports. Am I just missing it or does it have another name?
> <_______________________________________________
> <Sent via AMSAT-BB@xxxxx.xxx. 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: http://www.amsat.org/mailman/listinfo/amsat-bb
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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: http://www.amsat.org/mailman/listinfo/amsat-bb
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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: http://www.amsat.org/mailman/listinfo/amsat-bb
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. 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: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 4
Date: Fri, 3 Mar 2017 03:54:01 +0000
From: Mark Lunday <wd4elg@xxxxxxx.xxx>
To: Mark Lunday <wd4elg@xxxxxxx.xxx>, Fer <mhz4464@xxxxx.xxx>, AMSAT
BB <amsat-bb@xxxxx.xxx>, Paul Stoetzer <n8hm@xxxx.xxx>, Robert
Bruninga <bruninga@xxxx.xxx>
Subject: Re: [amsat-bb] Still trying to decode NO-84
Message-ID:
<CO2PR06MB491C0DBF56784CAC56B3C6F952B0@xxxxxxxxxxxx.xxxxxxxx.xxxx.xxxxxxx.xxx>
Content-Type: text/plain; charset="utf-8"
I just caught the word ?beacon? and a partial call on the 0330 pass.
I think I saw my downlink when I was transmitting?there was about a 2-3
second delay after I started to transmit, but when I stopped transmit the
downlink signal ended almost immediately. This happened twice, so I think I
was getting through the bird.
OK, I will try something different next time. I will decode/receive using
my IC-910H instead of the SDRPlay RSP1 receiver.
Mark Lunday, WD4ELG
Greensboro, NC FM06be
wd4elg@xxxx.xxx
http://wd4elg.blogspot.com
SKCC #16439 FISTS #17972
------------------------------
Message: 5
Date: Fri, 3 Mar 2017 04:24:37 +0000
From: Jim Jerzycke <kq6ea@xxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Shack re-wiring: RTL-SDR options?
Message-ID: <6af403d6-f22d-c347-0484-d14b23385d20@xxxxxxx.xxx>
Content-Type: text/plain; charset=windows-1252; format=flowed
I don't think an RTL dongle will tune down that low.
Jim KQ6EA
On 03/02/2017 10:46 PM, Greg D wrote:
> Hi folks,
>
> Has anyone used an RTL-SDR dongle on the 10.7 MHz IF output from another
> receiver? Is that better than going direct?
>
> My cable TV provider is forcing us to go all-digital. With the new
> "cable box" comes the opportunity to re-wire the shack and simplify the
> many layers of cables, splitters, and lash-ups that have accumulated
> over the years. The proverbial camel is crying out for help.
>
> What this has to do with Ham Radio is that part of the lash-up mess is
> an old pre-CATV deep fringe TV antenna that I have in the attic, aimed
> to the southern horizon. We are well outside the range of any of the
> digital OTA stations, and never one to leave a perfectly good piece of
> RF equipment go to waste, I currently have it fed to an old Icom R-7000
> scanning receiver (previously used as the AO-40 downlink IF) and to an
> RTL-SDR dongle by way of a TV 2:1 splitter. I've tried hooking the
> dongle directly to my 2m ham antenna for satellite use, but for some
> reason that was less than satisfactory. Never really did hear much of
> anything, and never could figure out why. At least with the TV antenna,
> I can copy some stuff with the dongle, though the Icom is generally
> better. But the Icom doesn't do the various digital modes that are
> better suited for SDR.
>
> Looking at the back of the Icom, I see that it has a 10.7 MHz IF output,
> so the thought is that the SDR dongle might perform better hooked there
> (with a DC bias block) instead of to the antenna itself through the
> splitter. Both receivers have similar frequency coverage, but perhaps
> the Icom, while somewhat deaf by modern standards, might still make for
> a better front-end to the dongle?
>
> I think the down-side is that the Icom's IF bandpass is narrower than
> the Dongle's, so I'd lose some flexibility there. I would also lose the
> ability to software-control the frequency of the receive chain, outside
> of the IF bandpass.
>
> What do you think? Would this be a net win or loss for the RTL-SDR?
>
> Thanks,
>
> Greg KO6TH
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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: http://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 6
Date: Thu, 2 Mar 2017 20:40:50 -0800
From: Greg D <ko6th.greg@xxxxx.xxx>
To: Jim Jerzycke <kq6ea@xxxxxxx.xxx>, amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Shack re-wiring: RTL-SDR options?
Message-ID: <9c8b6fcf-2232-1f53-608f-9b7184c59491@xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Doh!
Well, that answers that question. Thanks, Jim. You are correct! 24.00
is the minimum Gqrx will let it go.
Greg KO6TH
Jim Jerzycke wrote:
> I don't think an RTL dongle will tune down that low.
>
>
> Jim KQ6EA
>
>
> On 03/02/2017 10:46 PM, Greg D wrote:
>> Hi folks,
>>
>> Has anyone used an RTL-SDR dongle on the 10.7 MHz IF output from another
>> receiver? Is that better than going direct?
>>
>> My cable TV provider is forcing us to go all-digital. With the new
>> "cable box" comes the opportunity to re-wire the shack and simplify the
>> many layers of cables, splitters, and lash-ups that have accumulated
>> over the years. The proverbial camel is crying out for help.
>>
>> What this has to do with Ham Radio is that part of the lash-up mess is
>> an old pre-CATV deep fringe TV antenna that I have in the attic, aimed
>> to the southern horizon. We are well outside the range of any of the
>> digital OTA stations, and never one to leave a perfectly good piece of
>> RF equipment go to waste, I currently have it fed to an old Icom R-7000
>> scanning receiver (previously used as the AO-40 downlink IF) and to an
>> RTL-SDR dongle by way of a TV 2:1 splitter. I've tried hooking the
>> dongle directly to my 2m ham antenna for satellite use, but for some
>> reason that was less than satisfactory. Never really did hear much of
>> anything, and never could figure out why. At least with the TV antenna,
>> I can copy some stuff with the dongle, though the Icom is generally
>> better. But the Icom doesn't do the various digital modes that are
>> better suited for SDR.
>>
>> Looking at the back of the Icom, I see that it has a 10.7 MHz IF output,
>> so the thought is that the SDR dongle might perform better hooked there
>> (with a DC bias block) instead of to the antenna itself through the
>> splitter. Both receivers have similar frequency coverage, but perhaps
>> the Icom, while somewhat deaf by modern standards, might still make for
>> a better front-end to the dongle?
>>
>> I think the down-side is that the Icom's IF bandpass is narrower than
>> the Dongle's, so I'd lose some flexibility there. I would also lose the
>> ability to software-control the frequency of the receive chain, outside
>> of the IF bandpass.
>>
>> What do you think? Would this be a net win or loss for the RTL-SDR?
>>
>> Thanks,
>>
>> Greg KO6TH
>>
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. 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: http://www.amsat.org/mailman/listinfo/amsat-bb
>>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 7
Date: Thu, 2 Mar 2017 23:03:31 -0600
From: "Mac A. Cody" <maccody@xxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Shack re-wiring: RTL-SDR options?
Message-ID: <4766f250-70fc-1186-df3f-1856114bb051@xxx.xxx>
Content-Type: text/plain; charset=windows-1252; format=flowed
Greg,
There are modified versions of the RTLSDR dongle that support
direct sampling. That is to say, a signal is fed directly into the
RTL2832 chip, bypassing the tuner/down-converter chip. This
enables reception of signals from 0 to 14.4 MHz (half the
28.8 Msps sampling rate of the analog-to-digital converter).
Perhaps you could make use of one of these. Search for them
on Ebay or through Google in general. You may need to
attenuate the 10.7 MHz IF signal prior to feeding into the
dongle, as too strong a signal will damage it. Hope this helps.
73,
Mac / AE5PH
On 03/02/2017 10:40 PM, Greg D wrote:
> Doh!
>
> Well, that answers that question. Thanks, Jim. You are correct! 24.00
> is the minimum Gqrx will let it go.
>
> Greg KO6TH
>
>
> Jim Jerzycke wrote:
>> I don't think an RTL dongle will tune down that low.
>>
>>
>> Jim KQ6EA
>>
>>
>> On 03/02/2017 10:46 PM, Greg D wrote:
>>> Hi folks,
>>>
>>> Has anyone used an RTL-SDR dongle on the 10.7 MHz IF output from another
>>> receiver? Is that better than going direct?
>>>
>>> My cable TV provider is forcing us to go all-digital. With the new
>>> "cable box" comes the opportunity to re-wire the shack and simplify the
>>> many layers of cables, splitters, and lash-ups that have accumulated
>>> over the years. The proverbial camel is crying out for help.
>>>
>>> What this has to do with Ham Radio is that part of the lash-up mess is
>>> an old pre-CATV deep fringe TV antenna that I have in the attic, aimed
>>> to the southern horizon. We are well outside the range of any of the
>>> digital OTA stations, and never one to leave a perfectly good piece of
>>> RF equipment go to waste, I currently have it fed to an old Icom R-7000
>>> scanning receiver (previously used as the AO-40 downlink IF) and to an
>>> RTL-SDR dongle by way of a TV 2:1 splitter. I've tried hooking the
>>> dongle directly to my 2m ham antenna for satellite use, but for some
>>> reason that was less than satisfactory. Never really did hear much of
>>> anything, and never could figure out why. At least with the TV antenna,
>>> I can copy some stuff with the dongle, though the Icom is generally
>>> better. But the Icom doesn't do the various digital modes that are
>>> better suited for SDR.
>>>
>>> Looking at the back of the Icom, I see that it has a 10.7 MHz IF output,
>>> so the thought is that the SDR dongle might perform better hooked there
>>> (with a DC bias block) instead of to the antenna itself through the
>>> splitter. Both receivers have similar frequency coverage, but perhaps
>>> the Icom, while somewhat deaf by modern standards, might still make for
>>> a better front-end to the dongle?
>>>
>>> I think the down-side is that the Icom's IF bandpass is narrower than
>>> the Dongle's, so I'd lose some flexibility there. I would also lose the
>>> ability to software-control the frequency of the receive chain, outside
>>> of the IF bandpass.
>>>
>>> What do you think? Would this be a net win or loss for the RTL-SDR?
>>>
>>> Thanks,
>>>
>>> Greg KO6TH
>>>
>>> _______________________________________________
>>> Sent via AMSAT-BB@xxxxx.xxx. 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: http://www.amsat.org/mailman/listinfo/amsat-bb
>>>
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. 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: http://www.amsat.org/mailman/listinfo/amsat-bb
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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: http://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 8
Date: Fri, 3 Mar 2017 00:09:19 -0500
From: "Scott" <scott23192@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Shack re-wiring: RTL-SDR options?
Message-ID: <84CBC69D25934D8FA4E7849B20E873E1@xxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=response
I don't know what your budget is, but an SDRPlay would work fine at those
frequencies and is a higher performing SDR as well.
-Scott, K4KDR
------------------------------------------------------------------------------
--
-----Original Message-----
From: Mac A. Cody
Sent: Friday, March 03, 2017 12:03 AM
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Shack re-wiring: RTL-SDR options?
Greg,
There are modified versions of the RTLSDR dongle that support
direct sampling. That is to say, a signal is fed directly into the
RTL2832 chip, bypassing the tuner/down-converter chip. This
enables reception of signals from 0 to 14.4 MHz (half the
28.8 Msps sampling rate of the analog-to-digital converter).
Perhaps you could make use of one of these. Search for them
on Ebay or through Google in general. You may need to
attenuate the 10.7 MHz IF signal prior to feeding into the
dongle, as too strong a signal will damage it. Hope this helps.
73,
Mac / AE5PH
On 03/02/2017 10:40 PM, Greg D wrote:
> Doh!
>
> Well, that answers that question. Thanks, Jim. You are correct! 24.00
> is the minimum Gqrx will let it go.
>
> Greg KO6TH
>
>
> Jim Jerzycke wrote:
>> I don't think an RTL dongle will tune down that low.
>>
>>
>> Jim KQ6EA
>>
>>
>> On 03/02/2017 10:46 PM, Greg D wrote:
>>> Hi folks,
>>>
>>> Has anyone used an RTL-SDR dongle on the 10.7 MHz IF output from another
>>> receiver? Is that better than going direct?
>>>
>>> My cable TV provider is forcing us to go all-digital. With the new
>>> "cable box" comes the opportunity to re-wire the shack and simplify the
>>> many layers of cables, splitters, and lash-ups that have accumulated
>>> over the years. The proverbial camel is crying out for help.
>>>
>>> What this has to do with Ham Radio is that part of the lash-up mess is
>>> an old pre-CATV deep fringe TV antenna that I have in the attic, aimed
>>> to the southern horizon. We are well outside the range of any of the
>>> digital OTA stations, and never one to leave a perfectly good piece of
>>> RF equipment go to waste, I currently have it fed to an old Icom R-7000
>>> scanning receiver (previously used as the AO-40 downlink IF) and to an
>>> RTL-SDR dongle by way of a TV 2:1 splitter. I've tried hooking the
>>> dongle directly to my 2m ham antenna for satellite use, but for some
>>> reason that was less than satisfactory. Never really did hear much of
>>> anything, and never could figure out why. At least with the TV antenna,
>>> I can copy some stuff with the dongle, though the Icom is generally
>>> better. But the Icom doesn't do the various digital modes that are
>>> better suited for SDR.
>>>
>>> Looking at the back of the Icom, I see that it has a 10.7 MHz IF output,
>>> so the thought is that the SDR dongle might perform better hooked there
>>> (with a DC bias block) instead of to the antenna itself through the
>>> splitter. Both receivers have similar frequency coverage, but perhaps
>>> the Icom, while somewhat deaf by modern standards, might still make for
>>> a better front-end to the dongle?
>>>
>>> I think the down-side is that the Icom's IF bandpass is narrower than
>>> the Dongle's, so I'd lose some flexibility there. I would also lose the
>>> ability to software-control the frequency of the receive chain, outside
>>> of the IF bandpass.
>>>
>>> What do you think? Would this be a net win or loss for the RTL-SDR?
>>>
>>> Thanks,
>>>
>>> Greg KO6TH
------------------------------
Message: 9
Date: Fri, 3 Mar 2017 05:18:12 +0000
From: Jim Jerzycke <kq6ea@xxxxxxx.xxx>
To: Greg D <ko6th.greg@xxxxx.xxx>, amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Shack re-wiring: RTL-SDR options?
Message-ID: <74aa74f4-d977-cc31-20cc-aad7e0008e22@xxxxxxx.xxx>
Content-Type: text/plain; charset=windows-1252; format=flowed
I know there are plans for simple upconverters out there, but I've never
built one.
I've owned most of the SDR receivers out there, from $5 dongles to both
FunCube dongles, the HackRF One, SDRplay, and now the AirSpy. Depending
on what you want to use them for, and *where* you're located, they can
be really cool, or a disappointment.
Here in the RF Alley of SoCal, the cheap dongles can really fold up on
strong signals many, many MHz away from the signal-of-interest.
Jim
On 03/03/2017 04:40 AM, Greg D wrote:
> Doh!
>
> Well, that answers that question. Thanks, Jim. You are correct! 24.00
> is the minimum Gqrx will let it go.
>
> Greg KO6TH
>
>
> Jim Jerzycke wrote:
>> I don't think an RTL dongle will tune down that low.
>>
>>
>> Jim KQ6EA
>>
>>
>> On 03/02/2017 10:46 PM, Greg D wrote:
>>> Hi folks,
>>>
>>> Has anyone used an RTL-SDR dongle on the 10.7 MHz IF output from another
>>> receiver? Is that better than going direct?
>>>
>>> My cable TV provider is forcing us to go all-digital. With the new
>>> "cable box" comes the opportunity to re-wire the shack and simplify the
>>> many layers of cables, splitters, and lash-ups that have accumulated
>>> over the years. The proverbial camel is crying out for help.
>>>
>>> What this has to do with Ham Radio is that part of the lash-up mess is
>>> an old pre-CATV deep fringe TV antenna that I have in the attic, aimed
>>> to the southern horizon. We are well outside the range of any of the
>>> digital OTA stations, and never one to leave a perfectly good piece of
>>> RF equipment go to waste, I currently have it fed to an old Icom R-7000
>>> scanning receiver (previously used as the AO-40 downlink IF) and to an
>>> RTL-SDR dongle by way of a TV 2:1 splitter. I've tried hooking the
>>> dongle directly to my 2m ham antenna for satellite use, but for some
>>> reason that was less than satisfactory. Never really did hear much of
>>> anything, and never could figure out why. At least with the TV antenna,
>>> I can copy some stuff with the dongle, though the Icom is generally
>>> better. But the Icom doesn't do the various digital modes that are
>>> better suited for SDR.
>>>
>>> Looking at the back of the Icom, I see that it has a 10.7 MHz IF output,
>>> so the thought is that the SDR dongle might perform better hooked there
>>> (with a DC bias block) instead of to the antenna itself through the
>>> splitter. Both receivers have similar frequency coverage, but perhaps
>>> the Icom, while somewhat deaf by modern standards, might still make for
>>> a better front-end to the dongle?
>>>
>>> I think the down-side is that the Icom's IF bandpass is narrower than
>>> the Dongle's, so I'd lose some flexibility there. I would also lose the
>>> ability to software-control the frequency of the receive chain, outside
>>> of the IF bandpass.
>>>
>>> What do you think? Would this be a net win or loss for the RTL-SDR?
>>>
>>> Thanks,
>>>
>>> Greg KO6TH
>>>
>>> _______________________________________________
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>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. 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: http://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Subject: Digest Footer
_______________________________________________
Sent via amsat-bb@xxxxx.xxx.
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!
http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 12, Issue 61
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