Hi Harold,
I was curious about the progress you made in bringing the B Twins back from storage. Did you replace the electrolytic caps with one of the upgrade kits? What issues have you run into since you started the project?
I wanted to share my recent experience and see if we had similar experience.
R-4B
The R-4B came back to life immediately after some inspection and cleaning. I cleaned the contacts in the band switch and used fader cleaner on some of the pots. The only issue I ran into was wonky behavior in the S meter. I eventually traced this to a bent pin in a 12AU6 vented it from being seated properly. I had to go through the alignment procedure for the S-meter which was very simple.
T-4XB
The T-4XB also came back to life after some inspection and cleaning. I still need to make another pass on the band switches as I have poor connection on some of the bands. 80 and 40 meters load up with no issue, but I discovered alignment issues on 15 and 20 meters. I don't remember having these issues 30 years ago when I last had QSOs with this rig. All the voltages check out with the PS-4 so, I am guessing the characteristics of the 6JB6s changed, but I really don't know the reason. The alignment procedure seems straight forward so I will tackle that next.
