They made the radios. Zenith-branded tubes were often Sylvanias but could be anything really.
Yep, those are just Tesla ECC88's, can tell by bottle shape and sloped getter support. Worth no more than about $30 a pair.
Well... I finally pulled the trigger and bought a second Siemens E188CC from tube museum to pair with the first one I found (RCA labelled)
this tube rolling is an expensive disease!! Hopefully they'll sound incredible!!
Hey guys, new here so please bear with me. :) I have an HE500 and wanted some better tubes than the stock tubes, any good suggestions? I've read through a lot of the pages of the old thread and all of this thread and it seems people mostly enjoy the Mastu****a 6922, Bugles Boys and the rare and expensive tubes such as the LRT RTC E18CC from Harleen and the Siemens E188CC with their HE500. I love great deep and extended, tight bass with a large spacious sound stage. Which tubes should I go for? Thanks for the help!