|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
64.110.232.60
Anyone out there know if 6SL7GT can be used in my amp designated for 6SL7GTB? What does the "B" signify?
Thanks
Follow Ups:
Thanks to everyone for the assistance
Warning: I'm not an expert.I have a lot of 6SL7s (6SL7, ECC35, CV1985, CV569, VT229, 5691). The 6SL7G, 6SL7GT, 6SL7WGT are other designations we see.
I know that GTA and GTB apply to 6SN7 valves - variants designed for TVs that could handle more plate voltage and wattage.
When this designation is used for 6SL7GT, one could surmise that a 6SL7GTB can handle more voltage - and maybe your amp applies more voltage. The Sylvania 6SL7GTB Brown Base is supposedly quite good.
Do you have the specifications. If your plate voltage is higher than normal you would be wise to find valves that can handle it.
Regards,
Geoff
I found this on the Web - on a forum about old juke boxes. It reinforces my scattered knowledge.Octal tube numbers with no "G" or "GT" are usually metal cased.
"G" suffix is a glass tube, usually coke-bottle shaped with a bulge in the middle. "GT" is a tubular (cylindrical) glass envelope. The A, B, C suffixes are improvements. When the "GTA" was introduced, manufacturers would stop producing "GT", and when "GTB" came out, the "GTA" versions went out of production.
While you can always go up in revision letters, sometimes you can't go backwards. The 6L6GC has higher ratings than the 6L6GB. If an amplifier is designed to push a 6L6GC to its limits, a 6L6GB will be driven beyond its design capacity. If it's designed for a 6L6GB (or GA, or G, or 6L6), then you can substitute a 6L6GC without trouble.
Regards,
Geoff
nt
This post is made possible by the generous support of people like you and our sponsors: