Subject: Tubes and sockets with brass pins or contacts September 28th 2018, 11:58 pm
If you are restoring a very old radio that uses the really old tubes with plain brass pins on them or plain brass contact sockets, be sure to clean them before you try the radio. You can get some nasty intermittents from the least little amount of corrosion or crud on the brass.
Rod Clay Technician
Join date : 2018-08-01
Subject: Re: Tubes and sockets with brass pins or contacts September 29th 2018, 3:49 pm
Quite true. I have been picking up some CX-301A (UX-201A) triode battery tubes recently and some of these came in with badly oxidized/corroded pins. Nickel pins can have some of this problem too. If the nickel pins look bumpy looking they'll need some cleaning too. I use a small brass wire brush to clean them but sometimes gentle scraping is required then some more brushing.