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rectifier tubes.

Posted by FenderLover on May 22, 2017 at 07:06:48:
In my world of guitar amps... huge difference. Both tone and reliability.
Been using Sylvania and GE NOS 5AR4 lately. Not as stout sounding as a good British Mullard or Dutch Amperex... but close. And reliable! Great in combo amps.
There are a ton of good old-stock 5U4GB rectifiers. My favorites are the black plates... TS, GE, and RCA.
Same goes for NOS 5Y3GT tubes. GE 6087 and Bendix 6106 seem to be best of the mil spec. 1950 era GE BP 5Y3GT are great tubes, too.