[Arran]

By the way, I found someone who is making reproduction electrolytic condenser cans. It's debatable whether it's worth buying them in this case over renovating some old ones, but it's obvious that some effort went into producing these:

http://www.ebay.com/itm/New-Production-1...1014697519

I know all about those capacitors to couple the B- to chassis in an AC/DC set, if it isn't there the set will motorboat and howl like crazy. Sometimes they are paralleled with a 220K ohm resistor. I'm actually quite surprised that they did not produce radios of transformerless design in the former Soviet Union since it was RCA who developed the high voltage 150 ma series string tubes, given that they are cheap to build, and that the regime was somewhat indifferent to safety in many ways, and they liked to copy RCA.
Regards
Arran