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In Reply to: RE: 6cg7 tube question... posted by onemug on October 05, 2016 at 11:43:15
I imagine it is amp dependent, but I used to have a preamp that used the 6CG7. When I bought it in the early 2000s, "the" tube was supposedly the RCA cleartops. After trying every brand I could get a hold of I found I liked the RCA blackplates and the Toshiba labeled tubes better than the cleartops, but the best tube in my preamp was the Mazda.
Upscale has them but the price is going up. The stock of NOS tubes is going to run out some day, so if you find a tube you really like, buy a lifetime supply. They are almost like an investment, they will continue to get more expensive, and you will be able to get your money back or make a profit if you no longer need them.
Follow Ups:
I particularly liked the Tosh's too. I had a Counterpoint pre that would also accept 6CG7s. The Tosh sounded very nice in a circuit designed for a 6DJ8.
I always wondered if the Toshiba was a rebranded tube or made by them. I don't recall seeing Toshiba on any of the 12ax7 or 12au7s,that I got a hold of.
I had two pair of Teonex branded Mazda. The most common were the 6cg7 GEs, I didn't care for those.
My current preamp uses 6H30,and the only NOS of those are the 6H30dr which are hard to find and a few dealers who had them listed were charging $250 a pair, but out of stock. I replaced the EH gold pins, with the same 6H30 EH, but cyroed. I'm real happy with them. I kind of like the lack of options, it discourages obsessing over a lot of different NOS tubes.
Think both Toshiba and Matsushita had tube making plants in Japan.
IIRC, Hitachi too. That many Matsushita made tubes are highly regarded is not at all surprising. Matsushita bought tooling from Mullard.
Eli D.
I might as well pile on in that I own tubes from those 3 plants Hitachi, Toshiba and Matsushita. I wouldn't be surprised if there were others like Nippon Electric know now as NEC, in tube's "Heyday".
( BTW What was tube's Heyday? I will guess 1925 to 1969- don't mean to threadjack- sorry)
My guess would be it ended around 1960. I was born late 1954, and transistor radios were available and affordable by the time I was about 6. Could been a few years earlier. I had 1955 Chevy that had tubes in the radio head, and a tube amp by the glove box. My 1964 Skylark had a solid state radio.
I'm sure there is a history of tubes online somewhere.
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