(!!) (Best Pair) 0B3 Sylvania NOS 1940's (argon)
By Tube World
$ 13.99
1 pair) 0B3 Sylvania NOS 1940's
- ARGON GAS
(OB3=voltage regulator; 90V @ 5-40ma) (argon gas)
- Decware Torii MKIV
See more: vacuum tube