[MRCA] TR-77/prog rock…Field Day Power

[Jason WA6BBQ]

If this thing will cooperate, I’m attaching the document I worked from to
adapt a pair of QRP Labs ProgRock II’s to my TRC-77a.

Jason WA6BBQ

[image: PDF File]
<https://drive.google.com/file/d/1_KCen3EmFjf0XOt3HMfcHdLWViWm-fPE>
The ProgRock 2 in the TRC77.pdf
<https://drive.google.com/file/d/1_KCen3EmFjf0XOt3HMfcHdLWViWm-fPE>


On Tue, Jun 2, 2026 at 07:15 Michael St. Angelo via MRCA <
mrca at mailman.qth.net> wrote:

> I would recommend a Si5351 synthesizer board with Arduino controller.
>
> Here is an example that is overkill but you will get the idea. I did order
> Si5351 Synthesizers from Jason it the past
>
>
> https://www.9h5bm.com/product/avr-gated-gps-locked-frequency-counterstandard
>
> I don't code but if I find one I will send you a link.
>
> Mike N2MS
>
> > On 06/02/2026 7:28 AM EDT Rob Flory via MRCA <mrca at mailman.qth.net>
> wrote:
> >
> >
> > Zorro, nice repurposing of the medical tin.
> >
> > I may have to get my TRC-77 out in the field for field Day.
> >
> > Speaking of the TRC-77 in modern use, I wonder how hard it would be to
> make an Arduino controller to tune progrocks with external thumbwheels or
> even knob for kc and thumbwheel for Mc.
> >
> > I did manage to work a handful of stations with my TBX in the field some
> years back. I can't remember if I ran the transmitter on the EF generator
> or on the dynamotors. Probably the latter.
> >
> > RF
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