[K3CAL] interesting intermod read

[wa4prr at comcast.net]

Wayne- 

Thanks for the freq. references. This will help in the number crunching to try to find the mixing products that may be causing our problems. I'm not on the repeater committee, just doing some research to try to help out. 

Ron 

----- Original Message -----
From: "Wayne Rogers" <n1wr at chesapeake.net> 
To: "Calvert Amateur Radio Association - K3CAL" <k3cal at mailman.qth.net> 
Sent: Tuesday, July 26, 2011 1:55:29 PM 
Subject: Re: [K3CAL] interesting intermod read 


FWIW - the FCC requires that a transmitting authorization be posted near the transmitter. It would have the frequency on it. 

Also this might help: http://www.radioreference.com/apps/db/?ctid=1192#cid-2523 

And this: http://www.radioreference.com/apps/db/?action=cfcc&xid=1192&t=2&os=0&s=fr&bf=89 

73, Wayne N1WR 




From: Jim Tetlow 
Sent: Tuesday, July 26, 2011 1:46 PM 
To: 'Calvert Amateur Radio Association - K3CAL' 
Subject: Re: [K3CAL] interesting intermod read 




That is great we will research the county for the exact frequency and that is still in the right price range. 






Regards, 



Jim Tetlow 



K3UGA 

jimtetlow at chesapeake.net 






From: k3cal-bounces at mailman.qth.net [mailto:k3cal-bounces at mailman.qth.net] On Behalf Of wa4prr at comcast.net 
Sent: Tuesday, July 26, 2011 11:59 AM 
To: Calvert Amateur Radio Association - K3CAL 
Subject: Re: [K3CAL] interesting intermod read 




Jim & All- 

I just talked to Dale at PAR. He recommends a custom High-Pass Filter to eliminate both the 39 MHz pager and the 106.7 FM signal from reaching our receiver front end. It would be installed at the receiver input after the duplexer. It will be a custom filter, built for us, and will cost $119.00. He can produce a filter in about 3 days after order. If we want to pursue this solution, I will need the exact frequency of the county pager. 

Good find on the filter company, Jim. 

Ron 
----- Original Message -----


From: "Jim Tetlow" <jimtetlow at chesapeake.net> 
To: "Calvert Amateur Radio Association - K3CAL" <k3cal at mailman.qth.net> 
Sent: Tuesday, July 26, 2011 11:22:29 AM 
Subject: [K3CAL] interesting intermod read 




All-FYI 



While researching a filter for intermod. Most were limited to HT's and lower power transceivers; not repeaters. I did however find a link on eHam.net which I have attached above. Read review by NM7R; this may warrant some investigation of PAR notch filters (I think we are looking at a different frequency as 39mhz or so ) but these can be built custom, still under $100.00 and he used this on a repeater. The downside it may limit sensitivity on receive side. Just a thought, comments encouraged. 





Regards, 



Jim Tetlow 



K3UGA 

jimtetlow at chesapeake.net 




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