The recent video by Shang066 highlights how these truly great portables can be improved using non-tubes in form of MOSFETs? I'm already sold on that 3V4! Audio on these was always lacking to save battery power. A ceramic filter in a 1U4, just awesome!
A model A600 is featured in the video. I have an R600 chassis 6R40, which is a few years prior to the A.
Trouble is, I have a great Zenith schematic and parts list for the A600 chassis 6A41
Are the mid 1950s models similar enough that I could use this for my R600?
BTW - I had borrowed this same model from my friends Dad when I was 12. I got a 50A1 and 1L6 (ordered via RS) and of course it came in the mail and, after I got off the school bus, raced home to try them and they worked! I though it was soooo cool back then that I could now "intercept" Radio Moscow and listen to propaganda. I gave it back when asked, by then I had a G500 and SWL was not as interesting anymore
