[R-390] R-390 audio, part-2

[Frank Hughes]

Hi,
Thanks for all the tips and advice on better audio for my ancient R-390!

Found "ER 181 JUN 2004 PG46 Audio Circuit Design in the R-390 Receiver
Family" in the piles.

This article describes how the Signal Corps requirements for audio were
done, and why it is not good
for the way we want to use these receivers.

Also found in ER #203 "Part -2 High Performance Audio for R-390 AM
reception" by Bill Feldman, N6PY
No idea which issue has Part-1! (Asking Ray....)

Thanks Brian KA9EGW for reminding me about the Diode Load circuit from
Chuck!
I had built and tested long ago when I was using his video training for the
R-390A. (Wish there were videos for the R-390..)

http://i180.photobucket.com/albums/x257/fish1_07/R-390/chuck_r_diode_load_circuit_zpsoamfqmmv.jpg

Will try it on 75M tonight, if the thunderstorms hold off.
73
Frank
KJ4OLL