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CX2SA > SATDIG 23.01.18 23:03l 948 Lines 29091 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: fox 1b (Roy Dean)
2. Re: Exciting Coax (Diane Bruce)
3. Re: Exciting Coax (Miles (WF1F))
4. Re: fox 1b (Burns Fisher)
5. Re: fox 1b (Nick Pugh)
6. Re: AO 91 Rumbling Noise (Zach Metzinger)
7. Re: fox 1b (Roy Dean)
8. Re: fox 1b (Burns Fisher)
9. Re: Exciting Coax (Greg D)
10. Re: Exciting Coax (Norm n3ykf)
11. Re: Exciting Coax (Glenn Miller - AA5PK)
12. Re: Exciting Coax (Greg D)
----------------------------------------------------------------------
Message: 1
Date: Tue, 23 Jan 2018 09:44:59 -0500
From: Roy Dean <royldean@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] fox 1b
Message-ID:
<CADGPg2tkssCofHtD2WCHufyZJ49tygG2Dy0E4ThMucQOCi1M4Q@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
"RadFxSat"
-Roy
K3RLD
> I have downloaded fox telem however I can find the fox ib file I see 1 1c
> and 1d file Suggestions?
------------------------------
Message: 2
Date: Tue, 23 Jan 2018 09:37:13 -0500
From: Diane Bruce <db@??.???>
To: Bob- W7LRD <w7lrd@???????.???>
Cc: amsat-bb@?????.???? anderson58625 <anderson58625@?????.???>
Subject: Re: [amsat-bb] Exciting Coax
Message-ID: <20180123143713.GA13196@?????.??.???>
Content-Type: text/plain; charset=us-ascii
On Mon, Jan 22, 2018 at 11:46:15PM -0800, Bob- W7LRD wrote:
> For 2 & 70cm I use LMR400. LMR is better (in my opinion), in that it's
more flexable, 9913 can get water inside. Unless coax connectors are super
sealed.
It's probably impossible to keep water from inside due to condensation.
That said, the more recent 9913 is supposed to be easier to keep dry.
I once saw on the web an enterprising university club station that rigged up
a dry air pump for their 9913 run. ;) LMR is far better IMO as well.
> 73 Bob W7LRD
73 Diane VA3DB
--
- db@???????.??? db@??.??? http://www.db.net/~db
------------------------------
Message: 3
Date: Tue, 23 Jan 2018 10:01:35 -0500
From: "Miles (WF1F)" <ka1rrw@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Exciting Coax
Message-ID: <5A674E4F.40501@?????.???>
Content-Type: text/plain; charset=windows-1252; format=flowed
I just use "LMR" Super-flex cable for everything.
For short runs in a car 15-20 feet, I use LMR-240 Super-flex.
Its 0.240 in diameter and has measurably less loss at 20 feet (400 mc
and higher) than typical 0.195" coax.
In the Shack:
For HF, I use LMR-500 flexible with runs up to 200 feet.
It can handle full legal limit without melting.
For VHF and UHF runs of 100' or less, I use LMR-600 Super-flex.
It is flexible enough to go around a rotor.
Normal RG-8 coax is 0.405 inches in diameter.
LMR 600 is 0.600 inches in diameter.
The Greater the diameter, the lower the loss.
Its not the Name stamped on the cable that's important, it is the
diameter of the cable.
All 405 cable will have similar losses. It does not matter if its a 1$
per foot or 20$ per foot, 405 cable will have similar losses.
If you need less loss, go with thicker cable or hardline.
The loss with 600 is so much lower than 405 cable, i just do not count
DB 's any more.
Also, avoid splices, etc.
WF1F
On 1/22/2018 9:03 PM, anderson58625 wrote:
> Reading the subject line, I may have somehow mixed sarcasm with a potential
> pun (eye of the beholder!) <grin>. Sorry for that.
>
>
>
> I seek to avoid investing in a set of cable producing hardware (or assembled
> cables) which I will regret later. I am hoping to get some guidance
> regarding coax for:
>
> 1) IF patch between equipment (male-male BNC's)
>
> 2) 2m feedline (N-connectors) (<50')
>
> 3) 70cm feedline (N-connectors) (<50')
>
> 4) A later potential for feedline carrying microwave frequencies
> (>1GHz)
>
>
>
> The frequency & loss-rate charts for coax are informative, but I'm not sure
> I'm seeing which connectors will fit what cable brand/types. With the
> variables of loss, dimensions, flexibility, and potential proprietary
> crimping systems, etc., I don't have enough experience or information to
> confidently make an online materials order. Things were much easier down
> here with just HF frequencies, RG-213, and good quality (weather protected)
> PL-259's! <grin>
>
>
>
> For IF patch cables, I figure these are conveying HF so the cable type/loss
> at 1-3' isn't very important. But, there is also shielding: A
> consideration?
>
> . Any thoughts on IF cables?
>
> . Plus, I've never attached a BNC to a cable. Easy? Avoid it?
>
> . Plan on a new crimper/die?
>
> . Or, if premade would be cheaper (just a few IF patch cables), any
> quality sources to recommend?
>
>
>
> For the 2m & 70cm feedlines, I know flexibility may be a consideration on
> rotating/elevating masts. Of course, I'm sure a rigid feedline may be
> superior elsewhere, but I am not at that point yet. Still, advice on that
> subject is gratefully appreciated. I need to provide good questions to hope
> for good answers, so what feedline you would recommend for:
>
> . Reasonable flexibility/portability
>
> . 2m-23cm
>
> . Modest power
>
> . <50'
>
> . For use with n-connectors
>
>
>
> The benefit of you knowledge and experience is much appreciated.
>
>
>
> 73
>
>
>
> Mark W9AT
>
>
>
>
>
> _______________________________________________
> 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: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 4
Date: Tue, 23 Jan 2018 10:21:38 -0500
From: Burns Fisher <burns@??????.??>
To: Roy Dean <royldean@?????.???>
Cc: AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] fox 1b
Message-ID:
<CABX7KxVnzPfu7zdvyBt-cZm==H9YZ93GqQOgEP4CUL4LxRaQHQ@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
In fact to make Keplerian element downloads work, the three satellites A,
B, and D have to be named AO-85, AO-91 and AO-92.
On Tue, Jan 23, 2018 at 9:44 AM, Roy Dean <royldean@?????.???> wrote:
> "RadFxSat"
>
> -Roy
> K3RLD
>
>
> > I have downloaded fox telem however I can find the fox ib file I see 1 1c
> > and 1d file Suggestions?
> _______________________________________________
> 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: http://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 5
Date: Tue, 23 Jan 2018 10:02:21 -0600
From: "Nick Pugh" <quadpugh@?????????.???>
To: "'Burns Fisher'" <burns@??????.??>, "'Roy Dean'"
<royldean@?????.???>
Cc: 'AMSAT BB' <amsat-bb@?????.???>
Subject: Re: [amsat-bb] fox 1b
Message-ID: <008f01d39463$8de821f0$a9b865d0$@?????????.???>
Content-Type: text/plain; charset="iso-8859-1"
Hello Burns
I got the Kepts what I am looking for is the fox 1 b config file for
foxtelem
nick
Cell????? 337 258 2527
?
Helping UL become a world Class Engineering ?and Educational School
Disagree I Learn
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@?????.???? On Behalf Of Burns Fisher
Sent: Tuesday, January 23, 2018 9:22 AM
To: Roy Dean <royldean@?????.???>
Cc: AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] fox 1b
In fact to make Keplerian element downloads work, the three satellites A, B,
and D have to be named AO-85, AO-91 and AO-92.
On Tue, Jan 23, 2018 at 9:44 AM, Roy Dean <royldean@?????.???> wrote:
> "RadFxSat"
>
> -Roy
> K3RLD
>
>
> > I have downloaded fox telem however I can find the fox ib file I see
> > 1 1c and 1d file Suggestions?
> _______________________________________________
> 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: http://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: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 6
Date: Tue, 23 Jan 2018 10:09:03 -0600
From: Zach Metzinger <zmetzing@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] AO 91 Rumbling Noise
Message-ID: <0defb9f7-7882-4113-4129-96637b8d5664@?????.???>
Content-Type: text/plain; charset=utf-8
On 01/22/18 15:45, Bernie and Cheryl wrote:
> Thanks for the replies, guys. That explains it. I'd just never heard
> it before on other FM birds.
>
> 73 de Bernie, KF0QS
>
>
> On 1/22/2018 2:08 PM, Alan wrote:
>> Bernie,
>>
>> You are hearing the Data Under Voice telemetry. It is transmitted in
>> <-----Original Message-----
>> <From: AMSAT-BB [mailto:amsat-bb-bounces@?????.???? On Behalf Of Bernie
>> <Forgive me if someone has already discussed this, but I noticed a
>> <"rumbling" noise in the background during this morning's AO 91 pass.
>> <What is that? It almost sounds like a train is passing by. It was not
I believe this was specifically designed to keep the VP-Engineering
happy, given his predilection for train sounds. hihi
--- Zach
N0ZGO
------------------------------
Message: 7
Date: Tue, 23 Jan 2018 11:27:43 -0500
From: Roy Dean <royldean@?????.???>
Cc: AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] fox 1b
Message-ID:
<CADGPg2urUp+MmX16bcJ8Qg2e0C5cuNbDTvjbF2q67RipO-xKVQ@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Is it not in the "spacecraft" folder listed as "radfxsat"?
--Roy
K3RLD
On Tue, Jan 23, 2018 at 11:02 AM, Nick Pugh <quadpugh@?????????.???> wrote:
> Hello Burns
>
> I got the Kepts what I am looking for is the fox 1 b config file for
> foxtelem
>
>
>
>
>
>
>
>
> nick
>
>
------------------------------
Message: 8
Date: Tue, 23 Jan 2018 11:37:17 -0500
From: Burns Fisher <burns@??????.??>
To: Roy Dean <royldean@?????.???>
Cc: AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] fox 1b
Message-ID:
<CABX7KxXTaXnpviaXDxJSSbB4s7Ak7-GerAY7cKen-naFxUK-Yg@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Yes, it's kind of mix and match. The keps are put into FOX2.TLE. They are
taken from nasabare.txt where it looks for the name that is on spacecraft
tab (Input, AO-92, AO-91) etc. And the description file, also in the
spacecraft directory is called RadFxSat_fm.dat.
So it is the .dat file that you are missing Nick? What IS in the
spacecraft directory? What version of FoxTelem? Are you running it for
the first time? Are you giving it a data directory in the command line?
Can you just delete that whole spacecraft directory and start over? It
should offer to copy a new set of s/c files for you.
If all this does not help, you may have to contact Chris.
On Tue, Jan 23, 2018 at 11:27 AM, Roy Dean <royldean@?????.???> wrote:
> Is it not in the "spacecraft" folder listed as "radfxsat"?
>
> --Roy
> K3RLD
>
> On Tue, Jan 23, 2018 at 11:02 AM, Nick Pugh <quadpugh@?????????.???>
> wrote:
>
> > Hello Burns
> >
> > I got the Kepts what I am looking for is the fox 1 b config file for
> > foxtelem
> >
> >
> >
> >
> >
> >
> >
> >
> > nick
> >
> >
> _______________________________________________
> 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: http://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 9
Date: Tue, 23 Jan 2018 09:33:40 -0800
From: Greg D <ko6th.greg@?????.???>
To: Bob- W7LRD <w7lrd@???????.???>, anderson58625
<anderson58625@?????.???>
Cc: amsat-bb@?????.???
Subject: Re: [amsat-bb] Exciting Coax
Message-ID: <6a69296e-2305-fc75-963f-90fc40651444@?????.???>
Content-Type: text/plain; charset=ISO-8859-1
I've got hardline for my 60' runs on 70cm, and 1.2 ghz. Really works a
LOT better than 9913, especially with the water problems. Besides at
the connectors, the local squirrel population likes to gnaw at stuff,
and all it takes is one small chew to ruin the entire run. With
"regular" (solid innards) coax, the wound can be taped over with
electrical tape, since they don't seem to like the braid. Even the
smallest nick in 9913 will eventually be fatal.
Greg KO6TH
Bob- W7LRD wrote:
> For 2 & 70cm I use LMR400. LMR is better (in my opinion), in that it's
more flexable, 9913 can get water inside. Unless coax connectors are super
sealed.
> 73 Bob W7LRD
>
>> On January 22, 2018 at 6:03 PM anderson58625 <anderson58625@?????.???>
wrote:
>>
>>
>> Reading the subject line, I may have somehow mixed sarcasm with a potential
>> pun (eye of the beholder!) <grin>. Sorry for that.
>>
>>
>>
>> I seek to avoid investing in a set of cable producing hardware (or
assembled
>> cables) which I will regret later. I am hoping to get some guidance
>> regarding coax for:
>>
>> 1) IF patch between equipment (male-male BNC's)
>>
>> 2) 2m feedline (N-connectors) (<50')
>>
>> 3) 70cm feedline (N-connectors) (<50')
>>
>> 4) A later potential for feedline carrying microwave frequencies
>> (>1GHz)
>>
>>
>>
>> The frequency & loss-rate charts for coax are informative, but I'm not sure
>> I'm seeing which connectors will fit what cable brand/types. With the
>> variables of loss, dimensions, flexibility, and potential proprietary
>> crimping systems, etc., I don't have enough experience or information to
>> confidently make an online materials order. Things were much easier down
>> here with just HF frequencies, RG-213, and good quality (weather protected)
>> PL-259's! <grin>
>>
>>
>>
>> For IF patch cables, I figure these are conveying HF so the cable type/loss
>> at 1-3' isn't very important. But, there is also shielding: A
>> consideration?
>>
>> . Any thoughts on IF cables?
>>
>> . Plus, I've never attached a BNC to a cable. Easy? Avoid it?
>>
>> . Plan on a new crimper/die?
>>
>> . Or, if premade would be cheaper (just a few IF patch cables), any
>> quality sources to recommend?
>>
>>
>>
>> For the 2m & 70cm feedlines, I know flexibility may be a consideration on
>> rotating/elevating masts. Of course, I'm sure a rigid feedline may be
>> superior elsewhere, but I am not at that point yet. Still, advice on that
>> subject is gratefully appreciated. I need to provide good questions to
hope
>> for good answers, so what feedline you would recommend for:
>>
>> . Reasonable flexibility/portability
>>
>> . 2m-23cm
>>
>> . Modest power
>>
>> . <50'
>>
>> . For use with n-connectors
>>
>>
>>
>> The benefit of you knowledge and experience is much appreciated.
>>
>>
>>
>> 73
>>
>>
>>
>> Mark W9AT
>>
>>
>>
>>
>>
>> _______________________________________________
>> 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: http://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: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 10
Date: Tue, 23 Jan 2018 14:09:23 -0500
From: Norm n3ykf <normanlizeth@?????.???>
To: Greg D <ko6th.greg@?????.???>
Cc: "<, amsat-bb@?????.??????? " <amsat-bb@?????.???>, anderson58625
<anderson58625@?????.???>
Subject: Re: [amsat-bb] Exciting Coax
Message-ID:
<CAJUhCTPx=D_BkNMUisOnwU3ikS71U5txTP5OgEJfQMQghz9NnQ@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
9913 is not 9913F7
Google is your friend, or perhaps if one is lazy, not.
Norm n3ykf
On Tue, Jan 23, 2018 at 12:33 PM, Greg D <ko6th.greg@?????.???> wrote:
> I've got hardline for my 60' runs on 70cm, and 1.2 ghz. Really works a
> LOT better than 9913, especially with the water problems. Besides at
> the connectors, the local squirrel population likes to gnaw at stuff,
> and all it takes is one small chew to ruin the entire run. With
> "regular" (solid innards) coax, the wound can be taped over with
> electrical tape, since they don't seem to like the braid. Even the
> smallest nick in 9913 will eventually be fatal.
>
> Greg KO6TH
>
>
> Bob- W7LRD wrote:
>> For 2 & 70cm I use LMR400. LMR is better (in my opinion), in that it's
more flexable, 9913 can get water inside. Unless coax connectors are super
sealed.
>> 73 Bob W7LRD
>>
>>> On January 22, 2018 at 6:03 PM anderson58625 <anderson58625@?????.???>
wrote:
>>>
>>>
>>> Reading the subject line, I may have somehow mixed sarcasm with a
potential
>>> pun (eye of the beholder!) <grin>. Sorry for that.
>>>
>>>
>>>
>>> I seek to avoid investing in a set of cable producing hardware (or
assembled
>>> cables) which I will regret later. I am hoping to get some guidance
>>> regarding coax for:
>>>
>>> 1) IF patch between equipment (male-male BNC's)
>>>
>>> 2) 2m feedline (N-connectors) (<50')
>>>
>>> 3) 70cm feedline (N-connectors) (<50')
>>>
>>> 4) A later potential for feedline carrying microwave frequencies
>>> (>1GHz)
>>>
>>>
>>>
>>> The frequency & loss-rate charts for coax are informative, but I'm not
sure
>>> I'm seeing which connectors will fit what cable brand/types. With the
>>> variables of loss, dimensions, flexibility, and potential proprietary
>>> crimping systems, etc., I don't have enough experience or information to
>>> confidently make an online materials order. Things were much easier down
>>> here with just HF frequencies, RG-213, and good quality (weather
protected)
>>> PL-259's! <grin>
>>>
>>>
>>>
>>> For IF patch cables, I figure these are conveying HF so the cable
type/loss
>>> at 1-3' isn't very important. But, there is also shielding: A
>>> consideration?
>>>
>>> . Any thoughts on IF cables?
>>>
>>> . Plus, I've never attached a BNC to a cable. Easy? Avoid it?
>>>
>>> . Plan on a new crimper/die?
>>>
>>> . Or, if premade would be cheaper (just a few IF patch cables), any
>>> quality sources to recommend?
>>>
>>>
>>>
>>> For the 2m & 70cm feedlines, I know flexibility may be a consideration on
>>> rotating/elevating masts. Of course, I'm sure a rigid feedline may be
>>> superior elsewhere, but I am not at that point yet. Still, advice on that
>>> subject is gratefully appreciated. I need to provide good questions to
hope
>>> for good answers, so what feedline you would recommend for:
>>>
>>> . Reasonable flexibility/portability
>>>
>>> . 2m-23cm
>>>
>>> . Modest power
>>>
>>> . <50'
>>>
>>> . For use with n-connectors
>>>
>>>
>>>
>>> The benefit of you knowledge and experience is much appreciated.
>>>
>>>
>>>
>>> 73
>>>
>>>
>>>
>>> Mark W9AT
>>>
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> 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: http://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: http://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: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 11
Date: Tue, 23 Jan 2018 14:36:01 -0600
From: "Glenn Miller - AA5PK" <aa5pk@??????????.???>
To: "AMSAT BBS" <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Exciting Coax
Message-ID: <55F1112961434BD280E74FEC9D156A4E@???????>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
9913F7 has nearly 10 dB attenuation/100 feet at 400 MHz. 9913 has about 2.6
dB.
https://edesk.belden.com/products/techdata/metric/pdf/9913F7.pdf
https://catalog.belden.com/techdata/EN/9913_techdata.pdf
I know which I'd choose.
-----Original Message-----
From: Norm n3ykf
Sent: Tuesday, January 23, 2018 1:09 PM
To: Greg D
Cc: <, amsat-bb@?????.??????? ; anderson58625
Subject: Re: [amsat-bb] Exciting Coax
9913 is not 9913F7
Google is your friend, or perhaps if one is lazy, not.
Norm n3ykf
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 12
Date: Tue, 23 Jan 2018 12:51:31 -0800
From: Greg D <ko6th.greg@?????.???>
To: Norm n3ykf <normanlizeth@?????.???>
Cc: Amsat BB <AMSAT-BB@?????.???>, anderson58625
<anderson58625@?????.???>
Subject: Re: [amsat-bb] Exciting Coax
Message-ID: <618cf1c1-3950-8b88-f3ca-f7c637723467@?????.???>
Content-Type: text/plain; charset=ISO-8859-1
Ok, fair enough. F7 is different than the original 9913, and that is an
important distinction. Bob's comment (which I quoted) was about the
original 9913. The F7 variety shouldn't be as susceptible to water, but
then it also isn't quite as good as (dry) 9913 or LMR-400.
But to the original question, which included a point about covering
microwave bands, none of the RG-8-ish type cables are appropriate for
more than a few feet on those bands. Except for the short flexible
portion around the rotor, LMR-600 or hardline is needed, or mount a
weather proof transverter up on the tower to shorten the microwave
portion of the feed. I still use a higher-grade cable for UHF, as my
run is over 60' from rig to antenna. Below that, it's more a matter of
availability and cost. Just don't go with the really skinny stuff
(RG-58 or RG-8X), because of both higher loss and lower power handling
capability.
A good comparison table I found is here:
https://mapleleafcom.com/PDFs_Downloads/CoaxLossChart.pdf
Greg KO6TH
Norm n3ykf wrote:
> 9913 is not 9913F7
>
> Google is your friend, or perhaps if one is lazy, not.
>
> Norm n3ykf
>
> On Tue, Jan 23, 2018 at 12:33 PM, Greg D <ko6th.greg@?????.???> wrote:
>> I've got hardline for my 60' runs on 70cm, and 1.2 ghz. Really works a
>> LOT better than 9913, especially with the water problems. Besides at
>> the connectors, the local squirrel population likes to gnaw at stuff,
>> and all it takes is one small chew to ruin the entire run. With
>> "regular" (solid innards) coax, the wound can be taped over with
>> electrical tape, since they don't seem to like the braid. Even the
>> smallest nick in 9913 will eventually be fatal.
>>
>> Greg KO6TH
>>
>>
>> Bob- W7LRD wrote:
>>> For 2 & 70cm I use LMR400. LMR is better (in my opinion), in that it's
more flexable, 9913 can get water inside. Unless coax connectors are super
sealed.
>>> 73 Bob W7LRD
>>>
>>>> On January 22, 2018 at 6:03 PM anderson58625 <anderson58625@?????.???>
wrote:
>>>>
>>>>
>>>> Reading the subject line, I may have somehow mixed sarcasm with a
potential
>>>> pun (eye of the beholder!) <grin>. Sorry for that.
>>>>
>>>>
>>>>
>>>> I seek to avoid investing in a set of cable producing hardware (or
assembled
>>>> cables) which I will regret later. I am hoping to get some guidance
>>>> regarding coax for:
>>>>
>>>> 1) IF patch between equipment (male-male BNC's)
>>>>
>>>> 2) 2m feedline (N-connectors) (<50')
>>>>
>>>> 3) 70cm feedline (N-connectors) (<50')
>>>>
>>>> 4) A later potential for feedline carrying microwave frequencies
>>>> (>1GHz)
>>>>
>>>>
>>>>
>>>> The frequency & loss-rate charts for coax are informative, but I'm not
sure
>>>> I'm seeing which connectors will fit what cable brand/types. With the
>>>> variables of loss, dimensions, flexibility, and potential proprietary
>>>> crimping systems, etc., I don't have enough experience or information to
>>>> confidently make an online materials order. Things were much easier down
>>>> here with just HF frequencies, RG-213, and good quality (weather
protected)
>>>> PL-259's! <grin>
>>>>
>>>>
>>>>
>>>> For IF patch cables, I figure these are conveying HF so the cable
type/loss
>>>> at 1-3' isn't very important. But, there is also shielding: A
>>>> consideration?
>>>>
>>>> . Any thoughts on IF cables?
>>>>
>>>> . Plus, I've never attached a BNC to a cable. Easy? Avoid it?
>>>>
>>>> . Plan on a new crimper/die?
>>>>
>>>> . Or, if premade would be cheaper (just a few IF patch cables), any
>>>> quality sources to recommend?
>>>>
>>>>
>>>>
>>>> For the 2m & 70cm feedlines, I know flexibility may be a consideration on
>>>> rotating/elevating masts. Of course, I'm sure a rigid feedline may be
>>>> superior elsewhere, but I am not at that point yet. Still, advice on
that
>>>> subject is gratefully appreciated. I need to provide good questions to
hope
>>>> for good answers, so what feedline you would recommend for:
>>>>
>>>> . Reasonable flexibility/portability
>>>>
>>>> . 2m-23cm
>>>>
>>>> . Modest power
>>>>
>>>> . <50'
>>>>
>>>> . For use with n-connectors
>>>>
>>>>
>>>>
>>>> The benefit of you knowledge and experience is much appreciated.
>>>>
>>>>
>>>>
>>>> 73
>>>>
>>>>
>>>>
>>>> Mark W9AT
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
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>>> _______________________________________________
>>> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
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>> _______________________________________________
>> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
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AMSAT-NA.
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------------------------------
Subject: Digest Footer
_______________________________________________
Sent via amsat-bb@?????.???.
AMSAT-NA makes this open forum available to all interested persons worldwide
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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!
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End of AMSAT-BB Digest, Vol 13, Issue 36
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