[MAMS] April 2011 Microwave Activity Day

[M Ragouzis]

Hi Dave

Thanks for the note of the 11th.

My brother  Bruce ,  may have a 6 foot fiberglass dish to give away , he spoke 
about it yesterday and he lives near you.
I have a phone call in to his message center now just so he doesn't cut it up 
before some one has a chance at it.

I hope things are going well for you , we should have a breakfast meeting some 
time , what do you think ? , I do not know anyone in the club by face ( how many 
are here in the st louis area ) .

Is anyone working on SDR using the Apple i-phone or i-Pod products for  a 10 
ghzreceiver ?

I'm still working on getting the SDR radio up and running , I found a 741 OP amp 
in the junk drawer last night , the RF front end will work through the computer 
sound card but not through Jim's i-phone or i-pod , so it looks like the i stuff 
needs more gain , Jim discovered ad added the 10M ohm resistor across the mic 
input to let the i-phone/pod know that it has and external mic.

Plugging in the mic/sdrrffront end caused a spike to form on the display but 
nothing more than this , were getting closer.
I don't know that the 741 will be quiet enough , but as things are right now 
something would be better than nothing.

If we go through the 1/8 inch jack we only get one channel so it I or Q and we 
have just a one channel direct conversion radio ( ? ).
But we will have the ability to use the software to narrow down the band width , 
so this should be real good for 10 ghz.

I have the 2 meter N-channel amp built , I just need to tune it up .as you know 
we were talking about dynamic range problem's , I hope this and sdr will make a 
running receiver.

OH , I picked up a "Gunn Oscillator " that I tuned to 10.368 ghz , so it might 
be good for CW even though its a little wide  ( I have a filter ) .

So much stuff to do so little time.
Mike
N0obi
73







________________________________
From: Dave Calvert <kb0pe at yahoo.com>
To: Mid-America Microwave Society <mams at mailman.qth.net>
Sent: Sat, April 2, 2011 9:28:53 PM
Subject: [MAMS]  April 2011 Microwave Activity Day

I went to EM49au ( AT&T microwave tower site ) and setup at 6am and was ready to 


go on 902, 3456 and 5760....  It was windy and the bands were dead!  I looked 
around
for the beacon on 902 (K3SIW's) and nothing.  I did have some long q's on 
144.200
at around 11am with South St. Louis and that was it....
73,
Dave -KB0PE 

Starting Monday April 11th, 7-11PM local. 2M Sprint. 
Tuesday April 19th - 222 Sprint. 
Wednesday April 27th - 432 Sprint. 


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