[ARC5] GO-9: Cathode Mod Questions

[D C _Mac_ Macdonald]

50 or more years ago, there was a QST article about using a vacuum tube in series with the cathode to ground lead to do cathode modulation.  I seem to remember that it used a 6Y6G and I built one to modulate a pair of 1625s or 807s.  It cut the "normal" amplifier tube cathode current to about half of the CW value.  I don't know anything about a GO-9, but if you choose a modulator tube capable of about half the GO-9 power, this MAY give you satisfactory modulation.  I had no means (scope) in those poor high school student days, but that modulator simply plugged into the normal CW keying jack of the transmitter and seemed to give decent results until I was able to build a "real" plate modulator for my homebrew transmitter.

73 de Mac, K2GKK/5​
Since 30 Nov 1953​
Oklahoma City, OK​
USAF, Retired ('61-'81)​
FAA, Retired ('94-'10)​

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/arc5/attachments/20191120/084d3c92/attachment.html>