Good luck with the project. I did it and wrote the article for ER. Still use
it over 20 yrs later.
On Wednesday, May 29, 2024 at 08:57:05 AM CDT, Byron Tatum
<[email protected]> wrote:
Thanks all for the help!! I now have schematics of Series 500 IF unit and
the alignment info. My goal is to have a modified R-390 IF unit fitted into an
R-390A mainframe for listening pleasure. I don't feel I need the mu-metal
shielded PTO nor the hum-bucking filament circuit for PTO/BFO. In this
R-390A mainframe I will use the Longmont Labs modified audio deck. I studied
the ER article years back when it first appeared and have had an interest in
one. I have a boxed one from Longmont Audio Labs to try out, out of an estate.
As a side note I build tube guitar amps, mostly on blank steel chassis
(Fender Super Reverb size) from ZH Music. I incorporate reverb and tremolo
circuits into them. I build them using my own style with "tag" strips. Attached
two photos of a 100 watt build using pair of KT-88. Have cabinets custom built
in 2x10, 1x12 and 2x12. I can't play but I sure enjoy listening to them. So the
Longmont audio chassis sparked some interest.Sincere thanks and glad to be
associated with this great group.
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