So - the completed replacement runs off the normal B+?
- Jerry, KF6VB
toggle quoted message
Show quoted text
On 2025-01-08 13:50, Gary WB6OGD via groups.io wrote:
It is pretty easy to make a solid state mixer. Unlike amplifiers, that
need just a certain amount of amplification, extra AVC inputs, etc.,
mixers are
basically non-linear choppers. They just need enough gain to chop and
enough voltage tolerance for the circuit they are in.
My very first experiment was a J-310 FET(the only FET I had) plugged
into the R-4A Pre-mixer socket. I only had to disconnect the +150V
plate supply resistor and hook it to about 18VDC(?). Worked fine
though hooking it to the T-4X and selecting XMTR control might have
blown it.
I researched more (stole designs and modded) and now have a plug in
tube replacement. Works great.
Attached is what I think I am running now. I also attached a 6AU6
replacement from the Collins site.
Beats trying to buy expensive, possibly bad old tubes. YMMV.
My 6HS6 is now safe and part of my 401K IRA.. hi hi...
73,
Gary
WB6OGD
Links:
------
[1] /g/DRAKE-RADIO/message/81765
[2] /mt/110491919/243852
[3] /g/DRAKE-RADIO/post
[4] /g/DRAKE-RADIO/editsub/243852
[5] /g/DRAKE-RADIO/leave/12260778/243852/767576506/xyzzy
