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CX2SA > SATDIG 20.01.14 14:39l 1063 Lines 35430 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: driver problems (Scott Smith)
2. Re: 145 MHz signal blocking 435 MHz downlink (Jim Jerzycke)
3. Re: 145 MHz signal blocking 435 MHz downlink (Greg D)
4. Re: 145 MHz signal blocking 435 MHz downlink (Paul)
5. Re: 145 MHz signal blocking 435 MHz downlink (Jim Jerzycke)
6. Re: 145 MHz signal blocking 435 MHz downlink (Greg D)
7. arduino balloon beacon via the ISS (Lizeth Norman)
8. Re: 145 MHz signal blocking 435 MHz downlink (Jim Jerzycke)
9. Re: 145 MHz signal blocking 435 MHz downlink (kc6uqh@xxx.xxxx
10. Re: 145 MHz signal blocking 435 MHz downlink (g0mrf@xxx.xxxx
11. balun and phasing lines for M2 436cp30 and 2mcp14 (Floyd Rodgers)
----------------------------------------------------------------------
Message: 1
Date: Sun, 19 Jan 2014 16:44:48 -0700
From: "Scott Smith" <ve6itv@xxxxx.xxx>
To: "Amsat" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: driver problems
Message-ID: <BAAD41AFE5884C3987DDEE76F84D044C@xxxxxxxxxxxxxxx>
Content-Type: text/plain; charset="Windows-1252"
Tnx everyone for the help on my drivers issue. also a very big thanks to
Erich who wrote the SATPC32 program. i also had the darn wrong Com port lol.
Have a great day everyone.
73 de Scott VE6ITV
------------------------------
Message: 2
Date: Mon, 20 Jan 2014 01:39:57 +0000
From: Jim Jerzycke <kq6ea@xxxxxxx.xxx>
To: Paul <paul.hamradio@xxxxxxx.xxx>, amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: 145 MHz signal blocking 435 MHz downlink
Message-ID: <52DC7E6D.3070708@xxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi, Paul
I use that antenna as my "Field Day" antenna, as it's much easier to
transport.
At home I use an M2 2M7 and a 420-450-11 with SSB preamps.
73, Jim KQ6EA
On 01/19/2014 11:21 PM, Paul wrote:
> Hello Jim,
>
> Do you still use the GulfAlpha 'Easy Sat' antenna?
> I'm looking for any advice on improving performance.
> I have already installed the diplexer as shown in the article below but it
> seems I'm getting no good signal on the 70cm uplink.
>
> Paul Delaney - K6HR
> http://k6hr.dyndns.org:8080
>
>
> -----Original Message-----
> From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
> Behalf Of Jim Jerzycke
> Sent: Sunday, January 19, 2014 11:09 AM
> 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
>
>
> ---
> This email is free from viruses and malware because avast! Antivirus
protection is active.
> http://www.avast.com
>
>
------------------------------
Message: 3
Date: Sun, 19 Jan 2014 19:41:33 -0800
From: Greg D <ko6th.greg@xxxxx.xxx>
To: Jim Jerzycke <kq6ea@xxxxxxx.xxx>, w4tas <w4tas@xxx.xxx>, "'AMSAT
Mailing List'" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: 145 MHz signal blocking 435 MHz downlink
Message-ID: <52DC9AED.9000106@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
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
------------------------------
Message: 4
Date: Sun, 19 Jan 2014 15:21:15 -0800
From: "Paul" <paul.hamradio@xxxxxxx.xxx>
To: "'Jim Jerzycke'" <kq6ea@xxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: 145 MHz signal blocking 435 MHz downlink
Message-ID: <14B236A38BE34374A887DD9C3BBFC920@xxxxxxx>
Content-Type: text/plain; charset=US-ASCII
Hello Jim,
Do you still use the GulfAlpha 'Easy Sat' antenna?
I'm looking for any advice on improving performance.
I have already installed the diplexer as shown in the article below but it
seems I'm getting no good signal on the 70cm uplink.
Paul Delaney - K6HR
http://k6hr.dyndns.org:8080
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Jim Jerzycke
Sent: Sunday, January 19, 2014 11:09 AM
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
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------------------------------
Message: 5
Date: Mon, 20 Jan 2014 04:28:32 +0000
From: Jim Jerzycke <kq6ea@xxxxxxx.xxx>
To: Greg D <ko6th.greg@xxxxx.xxx>, w4tas <w4tas@xxx.xxx>, "'AMSAT
Mailing List'" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: 145 MHz signal blocking 435 MHz downlink
Message-ID: <52DCA5F0.8080603@xxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Since I use a very good 2 Meter bandpass filter on my 2 Meter output, I
use the diplexer AT the antenna, ahead of the preamp.
Jim KQ6EA
On 01/20/2014 03:41 AM, Greg D wrote:
> 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
>
>
------------------------------
Message: 6
Date: Sun, 19 Jan 2014 20:54:08 -0800
From: Greg D <ko6th.greg@xxxxx.xxx>
To: Jim Jerzycke <kq6ea@xxxxxxx.xxx>, w4tas <w4tas@xxx.xxx>, "'AMSAT
Mailing List'" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: 145 MHz signal blocking 435 MHz downlink
Message-ID: <52DCABF0.5010401@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
The more I read about it, the more I expect that the right answer
depends on one's particular receive-side hardware. If it's already got
good out of band filtering, then the hi-pass filter offered by the
posted diagram won't help, since it's aimed at reducing the 2m
fundamental overload. For that, you need to use the 2m port on the Tx
side (Tx to Common, 2m port to antenna, leaving the 70cm port unconnected).
On the other hand, if the receiver pretty wide open, then the 2m
fundamental is the main problem, and the posted receive-side design will
eliminate it before it hits the receive chain.
Yes?
Greg KO6TH
Jim Jerzycke wrote:
> Since I use a very good 2 Meter bandpass filter on my 2 Meter output,
> I use the diplexer AT the antenna, ahead of the preamp.
>
> Jim KQ6EA
>
>
> On 01/20/2014 03:41 AM, Greg D wrote:
>> 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
>>
>>
>
------------------------------
Message: 7
Date: Sun, 19 Jan 2014 23:56:01 -0500
From: Lizeth Norman <normanlizeth@xxxxx.xxx>
To: "<, amsat-bb@xxxxx.xxxxxxx " <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] arduino balloon beacon via the ISS
Message-ID:
<CAJUhCTP9EK=V9QEMt0Pm24845ZbkH6XUL2iJNmDoPK=aui_d1Q@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi all,
Was doing some snooping on some of the arduino libraries available.
If the chip is aware of it's lat/long and time, via gps, how difficult
would it be to calculate the AOS/LOS of the ISS? Given is an appropriate
TLE set, of course.
Norm n3ykf
------------------------------
Message: 8
Date: Mon, 20 Jan 2014 05:07:41 +0000
From: Jim Jerzycke <kq6ea@xxxxxxx.xxx>
To: Greg D <ko6th.greg@xxxxx.xxx>, w4tas <w4tas@xxx.xxx>, "'AMSAT
Mailing List'" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: 145 MHz signal blocking 435 MHz downlink
Message-ID: <52DCAF1D.6080404@xxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Well, from my experience, every little bit helps.....
I first had the two antennas mounted horizontally on the cross boom, and
had some interference/desense. Then I installed the diplexer, and it
lessened. Then I put the 2 Meter bandpass filter on the transmitter, and
it improved some more. Then I mounted the two antennas at 45* to the
boom, making them 90* to each other, and it went down some more.
Short of hanging huge cavity filters on the antenna, and using a 20'
cross boom, I don't think there's much more I could do!
73, Jim
On 01/20/2014 04:54 AM, Greg D wrote:
> The more I read about it, the more I expect that the right answer
> depends on one's particular receive-side hardware. If it's already
> got good out of band filtering, then the hi-pass filter offered by the
> posted diagram won't help, since it's aimed at reducing the 2m
> fundamental overload. For that, you need to use the 2m port on the Tx
> side (Tx to Common, 2m port to antenna, leaving the 70cm port
> unconnected).
>
> On the other hand, if the receiver pretty wide open, then the 2m
> fundamental is the main problem, and the posted receive-side design
> will eliminate it before it hits the receive chain.
>
> Yes?
>
> Greg KO6TH
>
>
> Jim Jerzycke wrote:
>> Since I use a very good 2 Meter bandpass filter on my 2 Meter output,
>> I use the diplexer AT the antenna, ahead of the preamp.
>>
>> Jim KQ6EA
>>
>>
>> On 01/20/2014 03:41 AM, Greg D wrote:
>>> 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!
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>>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> 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!
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>>>>>
>>>>
>>>> _______________________________________________
>>>> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the
>>>> author.
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>>>> program!
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>>>
>>>
>>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
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------------------------------
Message: 9
Date: Sun, 19 Jan 2014 21:16:16 -0800
From: <kc6uqh@xxx.xxx>
To: "'Greg D'" <ko6th.greg@xxxxx.xxx>, "'Jim Jerzycke'"
<kq6ea@xxxxxxx.xxx>, "'w4tas'" <w4tas@xxx.xxx>, "'AMSAT Mailing List'"
<amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: 145 MHz signal blocking 435 MHz downlink
Message-ID: <000601cf159e$beb039f0$3c10add0$@xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
To All,
Solid State transmitters have white noise generated due to the changing I/O
reactance as a function of the junction voltage of FET/BJT devices. Since
both transmitters have low pass filters for harmonic suppression that also
reduce white noise above the transmit frequency the Diplexer is most
effective on the 70 cm side preventing white noise from blocking the 2M
receiver. BTW Tubes do not have white noise.
Art, KC6UQH
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Greg D
Sent: Sunday, January 19, 2014 7:42 PM
To: Jim Jerzycke; w4tas; 'AMSAT Mailing List'
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
------------------------------
Message: 10
Date: Mon, 20 Jan 2014 04:22:40 -0500 (EST)
From: g0mrf@xxx.xxx
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
Message-ID: <8D0E3D84D1E22EF-3838-974E@xxxxxxxxxxxxx.xxxxxx.xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
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
------------------------------
Message: 11
Date: Mon, 20 Jan 2014 07:29:28 -0600
From: Floyd Rodgers <kc5qbc@xxxxxx.xxx>
To: Greg D <ko6th.greg@xxxxx.xxx>, Jim Jerzycke <kq6ea@xxxxxxx.xxx>,
w4tas <w4tas@xxx.xxx>, "'AMSAT Mailing List'" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] balun and phasing lines for M2 436cp30 and 2mcp14
Message-ID: <52DD24B8.6040203@xxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
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 member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 9, Issue 22
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