[NLRS] 23GHz 2 foot MaComm dishes available again

[Doug Reed]

Personally, I have nothing against 24GHz WBFM but don't automatically 
say 30MHz IF. Instead, choose the IF based on what crystals or 
oscillator modules we can get cheap and easy. The 40.7 MHz LO crystal 
for a 30MHz IF costs $$$ and takes a long time to get. But 40 and 48 MHz 
crystals and oscillator modules are cheap and frequently available from 
local computer surplus stores or scrap equipment. There are lots of 
other crystals that could be used if we don't care exactly where the IF 
ends up. Choose something common that anybody can find in a scrap 
computer and let the IF fall where it may. As long as we all use the 
same LO frequency we don't care where the exact IF frequency is but 
we'll be able to communicate.

73, Doug.

aa9il at sbcglobal.net wrote:
> Hi all
>
> I picked up a couple of the dishes/white boxes years ago - sold
> off the dishes but kept the white box and their guts.  The 'guts'
> were two MACOM gun sources - one for RX and one for TX.  The
> RX could transmit as well by modulating the PSU line.
> Anyway, I have thought of using these for short range
> Q's during contests.  Also have picked up some Alpha
> sources with a rx diode, gunn, and varactor - a cheap
> way to get on the air - just add psu and a 30mhz wbfm IF.
> Anyway, if there is work on these, please include me in
> the email as I am going to be working on getting these
> up and running.  Got my start in wbfm and its still a
> quick/easy way to add a band.
>
> 73 de AA9IL
> Mike
>
>
> --- On Sat, 8/1/09, WBØLJC <wb0ljc at comcast.net> wrote:
>
>   
>> From: WBØLJC <wb0ljc at comcast.net>
>> Subject: Re: [NLRS] 23GHz 2 foot MaComm dishes available again
>> To: n0nas at amsat.org, "NLRS List" <nlrs at mailman.qth.net>
>> Date: Saturday, August 1, 2009, 11:46 PM
>>
>>
>> Hi Doug,
>>
>> I am interested in having some more people get on 24 G
>> WBFM. I have two woeking systems, although after today
>> one of them seems to working much better than the other.
>>
>> I know there are a number of 24 G Gunn sources sitting in
>> junk boxes. It would be fun to have them on the air. Just
>> think
>> of all the 10 G WBFM equipment that is also sitting in our
>> junk boxes.
>> With the dishes you have and the gunn sources it is easy to
>> get
>> 24 G WBFM going.  I hope it happens. I am willing to
>> help.
>>
>> 73, Gary  WBØLJC
>>
>> ----- Original Message ----- 
>> From: "Doug Reed" <n0nas at amsat.org>
>> To: "NLRS List" <nlrs at mailman.qth.net>
>> Sent: Saturday, August 01, 2009 12:07 PM
>> Subject: [NLRS] 23GHz 2 foot MaComm dishes available again
>>
>>
>>     
>>> A friend of mine has a dozen of these dishes
>>>       
>> available. These are a 2
>>     
>>> foot prime focus dish with button-hook waveguide feed
>>>       
>> for 23-24GHz. I
>>     
>>> haven't seen this batch but previous dishes mostly
>>>       
>> came with the
>>     
>>> radomes. They are basically free for the hauling, FOB
>>>       
>> North St Paul, MN.
>>     
>>> If I have to ship them, I expect the cost to be in the
>>>       
>> $30-$50 range due
>>     
>>> to the 30" or larger box that would be needed. Let me
>>>       
>> know if you are
>>     
>>> interested.
>>>
>>> John W0ZQ suggested early this year that maybe NLRS
>>>       
>> could kick-start
>>     
>>> more activity on 24GHz by starting with 24GHz
>>>       
>> Gunnplexers and seeing
>>     
>>> what we could do with them, sort of by recycling some
>>>       
>> of the old 10GHz
>>     
>>> Gunnplexer systems still in NLRS-land. If we want to
>>>       
>> try it, these
>>     
>>> dishes would be way more than the minimum needed. I
>>>       
>> also have some
>>     
>>> others that have gunnplexers and maybe they could be
>>>       
>> used for the
>>     
>>> project. I think there are a number of our members who
>>>       
>> have 24GHz
>>     
>>> Gunnplexers squirreled away in a drawer somewhere.
>>>       
>> Should we do
>>     
>>> something with them?
>>> 73, Doug Reed, N0NAS.
>>>       
>> ______________________________________________________________
>> NLRS mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/nlrs
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:NLRS at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>>     
>
>
>