[MRCA] QRP Military Radio Magic

[wa6bbq at sdf.org]

Thanks Anthony!

Attachment came across fine and printed perfectly.

I have a "non-A" radio, so I'll be that guinea pig. Hoping I'll have time
today to pour over Tim's TRC-77 page again to learn if there are any
differences between revisions that'll even make the distinction matter at
all.

Got my shipment notification from Hans!

Thanks again and 73!
Jason WA6BBQ

> Well, since it seems to be a hot topic on the list, I have attached a PDF
> of
> my instructions for installing the ProgRock 2 into the TRC-77.
>
> Hopefully, the attachment will get through. If not, I will find some
> alternative means.
>
> n3kcb
>
> ------ Original Message ------
> Received: Tue, 01 Oct 2024 07:27:49 PM EDT
> From: WA6BBQ via MRCA <mrca at mailman.qth.net>
> To: "mrca at mailman.qth.net" <mrca at mailman.qth.net>
> Subject: Re: [MRCA] QRP Military Radio Magic
>
> Excellent discussion!
>
> I put my order in for a few progrock2's. (already have a box full of their
> low pass filters, as yet unbuilt.)  TRC-77 will be one recipient, and I've
> got a pile of the old boat radios. Always thought it would be fun to move
> one onto 160M.
>
> Thanks!
> Jason WA6BBQ
>
>>  I have really enjoyed all the QRP Labs kits I've built.  Just a couple
>> weeks ago I put a 10m WSPR beacon on the air from here on Kauai using
>> another Ultimate 3S kit and a low-pass-filter kit.  A successful result
>> and quite economical.
>>
>> I've used ProgRock2 devices several times as a crystal substitute, and
>> I'd
>> like to share my experiences:
>> -Â  The USB programming requires that you know how to use a terminal
>> program to talk on a USB port.
>> - The output is a harmonic-rich square wave, so filtering may be
>> necessary
>> in some applications.  QRP Labs has very inexpensive low pass filter
> kits
>> that may be helpful.
>> -Â  These are microcontroller/synthesizer modules and as such will spray
>> significant radio noise.  When used in a transceiver or receiver you
>> should be ready for some reception interference.  Shielding and
> filtering
>> the lines into the ProgRock2 can help, but remember you are directly
>> coupling the unit into your receiver.  If a birdie from the ProgRock2
>> happens to fall on a desired channel it might be a difficult problem.
>> -Â  If you are considering using a ProgRock2 in an FM transmitter
>> application, you will need to make sure the rig uses phase modulation
>> and
>> not direct-FM.  Direct FM wants to frequency modulate the crystal
>> oscillator, and if you use a ProgRock you can't do that.
>>
>> I don't want to discourage people about the ProgRock2 - it is a very
>> handy
>> device and have successfully used them in projects.  But I have also
> been
>> frustrated and given up on that approach.  It is important to realize
> the
>> reality of the situation and manage one's expectations.
>>
>>
>> Steve WD8DASÂ Â 
>>
>> sbjohnston at aol.com  
>> http://www.wd8das.net/Â Â  http://af4k-crystals.com/Â Â 
>>
> --------------------------------------------------------------------Â Â 
>> Radio is your best entertainment value.  
>>
> --------------------------------------------------------------------Â Â 
>>
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