Tony-

For specs, go to http://www.rigpix.com/gonset/g77.htm. At the bottom
of the page you can click on "User manual", which takes you to
http://www.rigpix.com/gonset/g77_manual.pdf.

There is no mention of the 3201, only the 3117. The manual has the
diagram, but it is split with no overlap.

Fred
K4DII

Hi Fred,

the file on rigpix is actually the same file I had downloaded from BAMA. But
I had not realized that it also contains the model 3117 diagram.

So, thank you for pinpointing that.

Yes, a little piece of the diagram is missing, but no practical problem.

BTW I have determined that:

- power supply / modulator model 3117 (DC only with vibrator) was standard
for transmitter G-77
- power supply / modulator model 3201 (DC or 115VAC) was standard for
transmitter G-77A

I believe that model 3117 cannot be readily converted to AC operation (e.g.
by removing the vibrator and feeding 6VAC o 12VAC into its socket), as the
transformer is sized for the vibrator frequency, that is about 120 Hz. At 50
or 60 Hz the transformer would presumably draw too high a current under no
load conditions.

73

Tony I0JX
Rome, Italy