I hope readers have picked up on the discussion of the Islander DSB rig out of Cuba. We had a bit of a breakthrough on this recently. I’ve been writing about it on the blog:
https://soldersmoke.blogspot.com/2024/04/re-building-islander-dsbcw-rig-in-cuba.html
One thing I think is especially interesting: The Cubans were using parts taken out of old Soviet TV sets. One of the tubes used in the VFO section of the Islander was known among the Cuban hams as “the little spider.”
Arnie Coro CO2KK explains why:
“VFO is made with ONE of the 6 “little spider” 5 pentodes… By the way, I am sure you will like to know why the tube is locally known like that… the ZHE letter of the Cyrillic alphabet is something difficult to pronounce to a Cuban – or any other non slavic for the matter – and it resembles like a little spider on the tube’s carton and… that’s why it is not a 6 “ZHE” 5 but a 6 “little spider” five!!!”
6Ж5П https://ae01.alicdn.com/kf/Se8c1d07ef93e47fbbe84235b5c157165A.jpg_640x640Q90.jpg_.webp
Thanks!
Here is a link to a Russian tube manual I scanned a few years ago: https://one-electron.com/Archives/Tube/TubeBooks/Katznelson%20&%20Larionov%201981%20Receiving%20Tubes%20(ru).pdf There is an index 5 pages back from the end. It is in Russian, but it is not hard to read the data. Just remember that B = V (for volts).