6550's

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6550's

Postby stratopicker on Tue Jun 19, 2001 5:19 am

I know most around here are EL 34 afficionados. But my JMP Mark 2 Master 100 watt uses 6550's. I have groove tubes in it right now that came with it when I bought it and they sound really good. But I like to keep an eye out for NOS tubes. Thought somebody may have some experience with NOS 6550's..........The Stratman
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Re: 6550's

Postby twang on Tue Jun 19, 2001 10:15 am

OK I don't know a lot about tubes, but I think the best sounding 6550 I've come across is the Tungsol coke bottle type. I've got these in my Sound City 200 (mid to late 60's, non-master volume) and they sound great. The best description I can give is like some of the guitar sounds on some Dave Edmonds records with either Albert Lee and/or Billy Bremmer on guitar That's with my tele and Marshall 1960A cab which this amp seems to like. It also comes surprisingly close to the Eric Johnson sound on Steve's Boogie which is a tele through BF Twin. I guess this amp originally had KT88s, but I can't imagine they would sound any better than these Tungsol 6550s. This is what the amp came with when I got it. I've got no idea how available these tubes are or at what price. Anybody know?
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Re: 6550's

Postby Goku on Tue Jun 19, 2001 1:20 pm

Twang, the Tungsols are the holy grail of 6550s. You would be hard pressed to find more NOS without ponying up some serious dough. Whoever left those in there did you a great service! :D
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Re: 6550's

Postby twang on Tue Jun 19, 2001 4:07 pm

Yeah Goku, that's what I'm thinking too. I got this amp on eBay, and was the only bidder which surprised me. The seller did mention that the amp had Tungsol 6550s, but I didn't know anything about them so I was planning to put KT88s in there. Was I surprised when I tried the amp out and it sounded so great. It was only later that I found out these are pretty desirable tubes.
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Re: 6550's

Postby Goku on Tue Jun 19, 2001 4:22 pm

Yeah, the Tungsols don't sound at all like the "non musical" variety that were used in the imported Marshalls during the '70s :D
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Re: 6550's

Postby Swarty on Tue Jun 19, 2001 8:24 pm

The Tungsols come with a variety of names including RCA, GE, Leslie, Harmon Kardon and others...basically any US made coke bottle shaped 6550 is a Tungsol...I believe these were only made until the very early '70s, which was about the same time that GE developed the straight walled 6550A, which is a not my idea of a good sounding guitar tube...very harsh and hard sounding compared to the Tungsol, which to me sounds and bends very much like an EL34, but with a much solider, more robust lowend. I have a couple factory matched NOS pairs that I would consider selling or trading for ???
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Re: 6550's

Postby stratopicker on Tue Jun 19, 2001 11:16 pm

Thanks for the input from everybody. Tim, email me with your price. Maybe we can do a deal....The Stratman
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Re: 6550's

Postby stratopicker on Fri Jun 22, 2001 9:48 pm

Tim,<BR> Did you get my email?......The Stratman
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