GRC-9

[KA3EKH]

Got a bunch of AN/GRC-9 transmitter receivers in the shop that I am working on, early fifties technology that was intended as a field or vehicle radio and covers 2 to 12 MHz They make about five or six watts in AM and around fifteen on a good day in CW. The transmitter uses a 2E22 tube in the PA running suppressor modulation and produce ok AM with a T-17 microphone. The one in the picture is a French copy of the US set but mostly US manufacture. The receiver’s passband is wide enough to drive a fifty-five Chevy through. Figure they did that because it doesn’t matter if the other stations were off frequency or not you would still hear them.

[SM6OID]

Hi!

I have a GRC-9 that I use probably once a week or more, CW (80-40-30 m) and som AM on 80 & 40 m.
With the TX in Band 3 at the high end, I get surprisingly high power levels, more than specs.
In both CW and AM, and the AM sound fine, as AM sounds using a T-17 microphone that is...
It modulates well, is without screaming...

I use it with the DY-88 power supply set at 12 V. (can be set to 6-12-24 volts)
My GRC-9 is made by Telefunken and the face plate is in German...of course.
As far as I remember, it was overhauled in the early years of the 70's, not sure why, it's has never been used.
The previous owner bought it "in the box".

Sometimes I use the LV-80/GRC-9 "afterburner", then I get around 100 W on CW.
The LV-80/GRC-9 is made by Hagenuk, it comprises two parts PA and PS, the latter is feed by a 24 volt system.
PS is a transistorized unit while PA is tubes 2x 6159.

The receiver is...yes it is wide...

[KA3EKH]

Just put the video of one of the AN/GRC-9 that I have been playing with. There were many produced and many more options for powering by AC, Dry Battery with hand crank and Vehicle. Somehow get the feeling that the GRC-9 was something like the PRC-25/77 of its day.


https://www.youtube.com/watch?v=ekwSnH5sfbw