tube brand

[billcreller]

 Anyone heard of Haltron tubes ?  I bought a couple NOS 6SC7s that are Haltron brand.  My old National amp uses that one.

 I could rewire to a 6SL7, but wanted to keep the original type....

[Platefire]

Never heard of that brand but got a couple of amps with 6SC7's and been pretty happy with their performance. Platefire

[HotBluePlates]

An internet search turned up: "...  Haltron, which was part of the British Hall Electric company that distributed valves and components in the UK."

I would read that as akin to the old "International Servicemaster" or "Richardson Electronics"/"National" brands, which relabeled and distributed other makes' tubes.

Given the 6SC7 is a U.S. type, if the tube seems genuinely old, I'd assume it is a U.S. tube rebranded by Haltron for sale in the U.K. market.

[birt]

i have quite a lot of those. they seem to be relabeled tubes as some of them have more than one type of ink on the glass.

[billcreller]

  These both say "made in England" on the glass.  
 Anyway, the one I'm using works & sounds good.  Last time I bought a couple NOS tubes like that, they were microphonic as hell and I tossed them.

 The other tubes I bought were 6SJ7s, which have the brand name CEI on the box & on the tube.