|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
47.158.92.87
I have 2 pairs of these labeled Raytheon that I use in a Marantz 8b.
All test great. The long plates sound better to me and I know that's all that counts but I was wondering if there is a general consensus as to what is considered better...the long or short ones?
Follow Ups:
?
And how often do you listen to simple stereo (minimally miked) recordings of the same?
All well made 6CG7s have very low distortion when used properly.
I do not believe there should or will be any seriously audible difference.
Warmest
Tim Bailey
Skeptical Measurer & Audio Scrounger
I suspect that the long plates are original Raytheon US production, while the short plates are more likely Japanese production relabeled by Raytheon. I recall the US Raytheon 6cg7 is considered to be a Holy Grail of the 6cg7 family by some. The Japanese tubes (if that is what they are) may still be quite good.
While this is a little off topic, the 6cg7/6fq7 are the mini 9 pin version of the 6sn7. Of course it will cost less to build a 9 pin version of the 6sn7 because at the manufacturing level saving a penny is worth millions in the long run. So, it was inevitable that the 6sn7 needed to be economized. But for me with a choice between using either tube in a new build i would always choose the octal tube. To me it easier to use the octals as there is more space with the socket. You have way more brand choices with the 6sn7. The tube itself seems to be sturdier, and since the 6sn7 has a older manufacturing record, i believe they were made better. I have not compared the 2 side by side in a sound competition but i would bet on the octal tube to win. regards, Dak
If sturdiness is important, look to the Loctal 7N7. Remember, Loctal tubes were intended for mobile applications and are vibration resistant. While the 6SN7 and 7N7 are electrically equivalent, the Loctal version is an all but certain winner in a microphonics contest.
Regardless of branding, Loctal tubes were made at Sylvania's Emporium, PA, plant. Keep the good "press" Sylvania 6SN7s get in mind. You know damned well that Sylvania made 6SN7s and 7N7s from the same "cages", at the same time. Anything else would have been bad for profitability.
Eli D.
I know, Eli, i am slowly collecting them. But right now the ratio of 6sn7 to 7n7 is about a 100 to 1. I don't even know if i will be able to get to try them soon. sigh, so many tubes, so little time.
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.
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.
...the former has the interchannel shield and the 6FQ7 doesn't.
Anyone know if that's correct?
----------
Tin-eared audiofool, large-scale-Classical music lover, and damned-amateur fotografer.
William Bruce Cameron: "...not everything that can be counted counts, and not everything that counts can be counted."
Correct
A personally like long, black plate Tungsol 6CG7 with inter-plate shield.
Edits: 10/05/16
I'll probably try those Tungsols at some point.
I noticed my Raytheon long plates have that center shield.
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: