[ARC5] Working on the FA-7989 / TRX-102

[sbjohnston at aol.com]

No - as I said, I found that the ProgRock2 will likely need a shielded box with a filter on the output.  


Steve WD8DAS   

sbjohnston at aol.com   
http://www.wd8das.net/   http://af4k-crystals.com/   
--------------------------------------------------------------------   
Radio is your best entertainment value.   
--------------------------------------------------------------------   



 

    On Tuesday, August 29, 2023 at 11:25:43 AM CDT, <mstangelo at comcast.net> wrote:  
 
   did you place a low pass filter on the Progrock2?       Mike N2MS  
  On 08/29/2023 10:32 AM EDT sbjohnston--- via ARC5 <arc5 at mailman.qth.net> wrote:             Once I confirmed that the FA-7989 received well with a random crystal, I decided to take the opportunity to try the QRP Labs ProgRock2 as a "crystal substitute" to receive some local frequencies.  I'd ordered several of these programmable oscillators and this was a good excuse to program one and see how it worked.       The tiny unit programmed easily via USB on my Windows 10 laptop.  I set it up to run in place of the local oscillator on three of the local aviation frequencies.  I hooked it up and was almost instantly hearing aero traffic.         One problem:  self interference.  The ProgRock2 had enough spurious outputs that it was interfering with the reception of the desired signals.  I did not determine if the signals were spraying from the board or were present on the output - probably both.  I met my goal of working with these programmable oscillators but in this VHF application I think the ProgRock2 will need to be in a shielded box with a filter on the output.            73   Steve  WD8DAS       
   sbjohnston at aol.com   
     http://www.wd8das.net/       http://af4k-crystals.com/      --------------------------------------------------------------------   
    Radio is your best entertainment value.   
    --------------------------------------------------------------------                              ______________________________________________________________ 
ARC5 mailing list 
Home: http://mailman.qth.net/mailman/listinfo/arc5 
Help: http://mailman.qth.net/mmfaq.htm 
Post: mailto:ARC5 at mailman.qth.net 
 
This list hosted by: http://www.qsl.net 
Please help support this email list: https://www.qsl.net/donate.html 
   
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/arc5/attachments/20230829/3cae56be/attachment-0001.html>