[Arran]

Maybe they are worth experimenting with, though I would have to use some produced by the Fu Man Chu tube Co. in China, unless I won the lottery. I wonder if the plate voltage could be supplied with a microwave oven transformer? The audiophools would freak at that idea but there is an almost unlimited source of the things, and I think they put out enough milliamps. What I can't remember is whether they are center tapped or not.
What I find strange is why these goofs insist that ancient, obsolete, and obscure tubes, are the way to go for a stereo amp when you have 6L6s, 6V6s, 6BQ5s, available new for much more reasonable prices. When I was looking up rectifier tubes the other day, (specifically the maximum current of a 6X5 and a 5Y3/5Y4) the other day I found a site pitching one brand of rectifier tube over another because they supposedly made the amp sound better???? Please, audiophools, pick up an RCA tube manual, an ARRL yearbook, or something and find out how tubes actually function and how to read technical specs for each tube!!!
Regarding the type #50s again I forgot about the type #10s, I was thinking of amplifier tubes in general not specifically RCA ones. I remember reading that it was a common trick to use a type 171A in a battery set to get more output power, not sure if any came with them from the factory that ways as most adds seem to sell their sets without the tubes.
Regards
Arran