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CX2SA > SATDIG 20.01.14 21:07l 323 Lines 11282 Bytes #999 (0) @ WW
BID : AMSATBB923
Read: GUEST
Subj: AMSAT-BB-digest V9 23
Path: IZ3LSV<IK2XDE<DB0RES<ON0AR<F1OYP<F3KT<CX2SA
Sent: 140120/2003Z @:CX2SA.SAL.URY.SA #:2735 [Salto] FBB7.00e $:AMSATBB923
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: balun and phasing lines for M2 436cp30 and 2mcp14
(Lizeth Norman)
2. Re: balun and phasing lines for M2 436cp30 and 2mcp14
(Floyd Rodgers)
3. Flex5000A For Satellites (Richard Lawn)
4. Re: balun and phasing lines for M2 436cp30 and 2mcp14
(Lizeth Norman)
5. Re: 145 MHz signal blocking 435 MHz downlink (kc6uqh@xxx.xxxx
6. AO27.org (K4FEG)
----------------------------------------------------------------------
Message: 1
Date: Mon, 20 Jan 2014 10:14:57 -0500
From: Lizeth Norman <normanlizeth@xxxxx.xxx>
To: kc5qbc@xxxxxx.xxx
Cc: AMSAT Mailing List <amsat-bb@xxxxx.xxx>, Jim Jerzycke
<kq6ea@xxxxxxx.xxx>
Subject: [amsat-bb] Re: balun and phasing lines for M2 436cp30 and
2mcp14
Message-ID:
<CAJUhCTO2V9_DXGhc4=itbyX=vWsEYHqVQDznF9vhwTdoM+t+EA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Easy enough to make, the problem is that the crimping tool is 40-60$
M2 charges 66 bux for all four. Still waiting for my parts. Ordered them
two months ago.
73 de Norm n3ykf
On Mon, Jan 20, 2014 at 8:29 AM, Floyd Rodgers <kc5qbc@xxxxxx.xxx> wrote:
> Can anyone measure the balun and phasing lines for 436cp30 and 2mcp14 and
> tell me the lengths? Anyone with spares available?
> It seems my dogs loved the flavor they had.
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 2
Date: Mon, 20 Jan 2014 09:38:55 -0600
From: Floyd Rodgers <kc5qbc@xxxxxx.xxx>
To: AMSAT Mailing List <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: balun and phasing lines for M2 436cp30 and
2mcp14
Message-ID: <52DD430F.5060802@xxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Probably not quite the quality, but I was planning to use compression
fittings and tool from Home Depot since I have both.
Any hints on length or the design frequency? Guess I could construct
based on where I plan to use them.
That reminds me of the months I've been waiting on ball bearings for the
Yaesu az/el rotor which is why the antennas were on the ground where the
beasts live. Four pits actually defend them from other things pretty
well, and you wouldn't believe what they can do to 7/8 hardline.
------------------------------
Message: 3
Date: Mon, 20 Jan 2014 10:49:13 -0500
From: Richard Lawn <rjlawn@xxxxx.xxx>
To: Amsat BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Flex5000A For Satellites
Message-ID:
<CADQmrTGCpwvwP9Mq-YthAV7uHOvK4D5xyrVGAuEng8omKDTHqw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I'm considering using a Flex 5000 for satellite communication and wonder
how users are powering the mast mount preamps? I'd also like to hear from
anyone successfully using a Flex5KA with the V/U module on the Sats. You
can contact me on or off the list at rjlawn at gmail dot com.
73
Rick
W2JAZ
------------------------------
Message: 4
Date: Mon, 20 Jan 2014 11:24:38 -0500
From: Lizeth Norman <normanlizeth@xxxxx.xxx>
To: kc5qbc@xxxxxx.xxx
Cc: AMSAT Mailing List <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: balun and phasing lines for M2 436cp30 and
2mcp14
Message-ID:
<CAJUhCTM3bHxN39WsXpSTnznYmVktMJQtHNrJ+Aidta7+rfKZZg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Compression fittings from home depot work. I have the baluns and phasing
gear for both your antennas, as I have a set myself. The436cp30 ones are
off and I can measure them directly. However the 2m antenna is on the
tower. I will have that down in a few days. Will make measurements for you.
Norm n3ykf
On Mon, Jan 20, 2014 at 10:38 AM, Floyd Rodgers <kc5qbc@xxxxxx.xxx> wrote:
> Probably not quite the quality, but I was planning to use compression
> fittings and tool from Home Depot since I have both.
> Any hints on length or the design frequency? Guess I could construct based
> on where I plan to use them.
>
> That reminds me of the months I've been waiting on ball bearings for the
> Yaesu az/el rotor which is why the antennas were on the ground where the
> beasts live. Four pits actually defend them from other things pretty well,
> and you wouldn't believe what they can do to 7/8 hardline.
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 5
Date: Mon, 20 Jan 2014 08:59:20 -0800
From: <kc6uqh@xxx.xxx>
To: <g0mrf@xxx.xxx>, <ko6th.greg@xxxxx.xxx>, <kq6ea@xxxxxxx.xxx>,
<w4tas@xxx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: 145 MHz signal blocking 435 MHz downlink
Message-ID: <000e01cf1600$f63c6d00$e2b54700$@xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Greg,
I had a problem with 70cm jamming 2401 down link many years ago. The problem
turned out to be corrosion between the coax connector shell and the aluminum
antenna element. Cleaning up the connection solved the problem. The
corrosion acts like a diode and will make enough 3 order products to trash
any receiver. Use liquid electrical tape or non-corrosive (doesn't smell
like vinegar) silicon seal to keep these connections dry and clean.
Art, KC6UQH
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of g0mrf@xxx.xxx
Sent: Monday, January 20, 2014 1:23 AM
To: ko6th.greg@xxxxx.xxxx kq6ea@xxxxxxx.xxxx w4tas@xxx.xxxx
amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: 145 MHz signal blocking 435 MHz downlink
Hi Greg.
Most decent VHF transmitters will already have a pretty good LPF on the
output to reduce the harmonics.
However, receivers these days tend to be DC-Daylight, so frequently need a
filter to prevent 'blocking' by unwanted high level signals. In that case
preventing the VHF coming into the UHF receiver can be important
Thanks
David
-----Original Message-----
From: Greg D <ko6th.greg@xxxxx.xxx>
To: Jim Jerzycke <kq6ea@xxxxxxx.xxx>; w4tas <w4tas@xxx.xxx>; 'AMSAT Mailing
List' <amsat-bb@xxxxx.xxx>
Sent: Mon, 20 Jan 2014 3:47
Subject: [amsat-bb] Re: 145 MHz signal blocking 435 MHz downlink
I know this has been answered before, but I forget. Given one Diplexer, is
it better to put it on the Tx side to limit the 3rd harmionic going out, or
better on the Rx side to limit the VHF fundamental coming in?
Tony's diagram shows the later; I would have thought the former would be
more effective (hitting the problem at its source).
Greg KO6TH
Jim Jerzycke wrote:
> Yep, been using one of those for years!
>
> I have a Sinclair Labs unit that provides 100dB rejection outside of
> the 2 Meter band.
>
> Jim KQ6EA
>
>
> On 01/19/2014 07:32 PM, w4tas wrote:
>> I would also suggest a low pass filter on the two meter transmitter.
>> A diplexer will work well for this also.
>> This will reduce the third harmonic which is causing your problem.
>>
>> Good luck,
>>
>>
>>
>>
>> -----Original Message----- From: Jim Jerzycke
>> Sent: Sunday, January 19, 2014 2:09 PM
>> To: amsat-bb@xxxxx.xxx
>> Subject: [amsat-bb] Re: 145 MHz signal blocking 435 MHz downlink
>>
>> Buy a diplexer, and connect it as shown in the linked article:
>>
>>
>> http://www.amsat.org/amsat-new/articles/Mode-J/
>>
>> I also tilt both of my Yagis so they're 45* to the boom, which makes
>> them 90* to each other.
>>
>> Yes, I lose some signal on terrestrial use, but ti helped cut the
>> coupling, and desense, down quite a bit.
>>
>> 73, Jim KQ6EA
>>
>> On 01/19/2014 06:56 PM, Gabriel - EA6VQ wrote:
>>> Hi all,
>>>
>>> I have a coupling problem in my station when trying to work FO-29.
>>> My 2m
>>> signal is completely blocking the 435 MHz downlink, and so I can't
>>> hear my signal off the satellite. I guess it must be something
>>> related to the distance between the two yagis. (I use the
>>> terrestrial horizontal yagis you can see at
>>> http://www.dxmaps.com/jm19hn.html ). With mode-B satellites there is
>>> no problem. I have tried it with two different 435 receivers, and
>>> it's exactly the same.
>>>
>>> Anyone has had this problem o have an idea of the possible reason?
>>> And what
>>> is more important, of some way to solve it?
>>>
>>> Thanks for any possible help.
>>>
>>> 73. Gabriel - EA6VQ
>>> _________________________________________________________
>>> Web-Site: HTTP://www.dxmaps.com
>>> VQLog 3.1 (build 78): HTTP://www.vqlog.com
>>> _________________________________________________________
>>>
>>>
>>> _______________________________________________
>>> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the
>>> author.
>>> Not an AMSAT-NA member? Join now to support the amateur satellite
>>> program!
>>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>>>
>>
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>> Not an AMSAT-NA member? Join now to support the amateur satellite
>> program!
>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 6
Date: Mon, 20 Jan 2014 11:10:55 -0600
From: K4FEG <k4feg@xxxxx.xxx>
To: starcom-bb@xxxxxxxx.xxxx amsat-bb@xxxxx.xxxx satdx-bb@xxxxxxxx.xxx
Subject: [amsat-bb] AO27.org
Message-ID: <52DD589F.1060706@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
For those of us who occasionally check on the /*status of AO27*/, I
emailed /*Michael, N3UC,*/ and he told me that they have /*had a server
crash */and are in the process of getting it back up.
No additional information on the "Rescue Operations" for AO27 at this
time. Keep your fingers crossed folks! We may yet get AO27 back on the air.
Many thanks to the AO27 Group and their efforts to recover AO27 for
operations. We really appreciate your efforts!
73 ALL FRM;
K4FEG
Starcom/SATDX- bb's
EM55aj84ta
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 9, Issue 23
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