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Has anyone tried these tubes in a guitar or power amp? They are cheap, that's for sure. And there are tons of them around (in Russia and the Ukrane). I think they are 1970's-1980's vintage. I imagine they are also rugged, but what do they sound like?
Greetings from the sunny Brønshøj riveria on the banks of the lovely Utterslev Mose
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I run them in a Citation V and they have held up just fine for a year. I also put a pair in an old guitar amp that I rebuilt for a friend and he just loves them. I cannot remember the exact plate voltage on the Citation V, but it is in the range of 450 v and I know I run the tubes at about 45 mA idle bias current. Guitar amp was lower voltage and cathode bias and I recall setting the tubes at about 40 - 45 mA, somewhere in that range. Tubes have run just fine in both for quite some time. These are the 1970's coin base. Only issue was the box of 10 I bought were all over the map for matching. I matched them in the Citation V and I must have gone through 7 or 8 of the 10 tubes before finding 4 that were reasonably close. I must have tried 4 or 5 of the remaining ones to find a close pair for the guitar amp. All tested very strong though. However, at roughly $6 - $8 each if you buy 10 you can afford to do that. They sound great. At Mike Samra's urging I dropped 4 of them into my Citation II. I biased them to about 45 mA. They sounded fine, but were not in the same league with the Gold Lion reissue KT88 in that amp. So, I think they are a steal to replace a 6L6GC in most apps, but they do have their limitations. Well built, cheap, sound good, and will take 450 volts no problem. Certainly a very cheap experiment, but buy at least twice as many as you need unless you know the vendor is matching them for current draw. Then put them in the amp and measure them and you can surely find pairs. If you can get matched ones for under $10 a piece that might be worth it.
cheers,
Don
Got the tip from Jeff day on this very forum. My experience has been extremely good. tigher bass, a smoother treble (I the emphasis on treble is lower) and a much more sweeter midrange.
so I guess YMMV depending on the speaker and taste..
We use them all the time - they're rugged, reliable and sound quite good after a bit of breaking in... not to mention the fact they're a lot cheaper than the Sovtek 5881WGC; which of course is almost exactly the same tube (very slight difference in how they're constructed)... both made by Reflektor in any case.
If I could find a road to get away it wouldn't be too soon.... Shipwreck Moon
I can speak directly to that. I have recently re-tubed several of my bud's Fender amps with the early 70's 6P3S-Es, the ones with the coin base. They sounded MUCH better than any of the relatively recent production Sovtech and Chinese tubes they had in them (Groove Tubes, Ruby Tubes ect.)
I was concerned about the rated 250V anode voltage limit on the tubes. I know the Russians de-rate tubes a lot because they use them in Migs and other military equipment at high Gs and such. Another poster (forget who) posted that he had been using them for years in Fender amps with no problems, and that he's seen where they were successfully tested up to 600V on the anodes.
Too early to tell how they hold up, but so far (several months) so good. Hard to say how they'd sound in the audio world, read several 2nd hand reports that they sound very good in audio as well. With the guitars they had way more harmonic richness and sustain, sounded much smoother. Everyone agreed they were a big upgrade from the recent production "usual suspects", the guitar guys were grooving on the "tone"!;-) Definitely worth the 8 dollars including shipping that is a common asking price on ebay.
twystd
NT
Greetings from the sunny Brønshøj riveria on the banks of the lovely Utterslev Mose
They are equivalent to 6l6G or 6L6GB with regard to plate dissipation and voltage ratings. They sound as good as other 6L6, the differences being a matter of taste.
They have significantly lower max voltage and will burn out more quickly than 6L6GC depending upon how much they are "stressed".
I have power amps (Ideal Innovations Custom 30 monoblocks)- designed for them that sound great.
I bought a few quads of them some time back. They sound quite detailed in my homebrew amp. They don't have the bass that most American tubes have but provided clear articulate highs. They certainly don't have the "punch" that RCAs or SEDs have
Not my tube of choice but over all, not bad. They biased up just fine and were closely matched even though I got them from ebay. Since they are so cheap I think that they are worth the money.
They would most likely be great as a pass tube in a regulated PS or maybe even as a driver for higher powered amps. Admittedly I haven't been industrious enough to find out.
Lastly, they look to be well made. Good pin alignment and all the internal welds look good. The bottles are straight in the bases and the bases are all on tight. (are you listening JJ?)
roN
I am using the new Tung-Sol 6L6GC STR black plates
Greetings from the sunny Brønshøj riveria on the banks of the lovely Utterslev Mose
I just put some of these in my Niteshade integrated 6L6 SEP amp to compare against the Ei KT90 V1. All I can say is these tubes rock. Not quite the tone of the Ei .... but faster, clearer and subjectively more detailed than the Ei. The treble is very transparent but not in any way edgy or overdone. I really like these.
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