tube differences??

nogin007 · October 29th, 2003, 06:50 PM

The Bassman Ten I recently bought has the original tubes, RCA 6L6GC's. I have another set of Rca 6L6GC's that look like the same tube, except one set is 3/8 to 1/2 inch longer than the other set. Anyone know the difference, If any? Thanks.

Dacious · October 29th, 2003, 07:17 PM

RCA, like other vendors, as well as making tubes, bought some from other manufacturers with their logo. Also, the machines changed as did manufacturing processes. I think some later RCAs, shared their internal cooling structures with 7027s which are pretty similar other than a couple of linked pins. This made them a little different.

I have some sets of black-glass radiotrons which are marked identically, but some have taller envelopes than others, they all test the same and work similar as far as I can tell.

October 29th, 2003, 06:50 PM	#1 (permalink)
nogin007 Tele-Meister Join Date: Apr 2003 Posts: 156	tube differences?? The Bassman Ten I recently bought has the original tubes, RCA 6L6GC's. I have another set of Rca 6L6GC's that look like the same tube, except one set is 3/8 to 1/2 inch longer than the other set. Anyone know the difference, If any? Thanks.

October 29th, 2003, 07:17 PM	#2 (permalink)
Dacious Friend of Leo's Join Date: Mar 2003 Location: Godzone Posts: 2,612 35 Photos	RCA, like other vendors, as well as making tubes, bought some from other manufacturers with their logo. Also, the machines changed as did manufacturing processes. I think some later RCAs, shared their internal cooling structures with 7027s which are pretty similar other than a couple of linked pins. This made them a little different. I have some sets of black-glass radiotrons which are marked identically, but some have taller envelopes than others, they all test the same and work similar as far as I can tell. __________________ My other Telecaster is a Thinline The Tele Bible, Ch 1, v 10 Love thy Telecaster, covet not thy neighbour's Strat!