Paladin79
Previously MOT: Cables For Less
IMHO you were sent the wrong tubes.
The Reference 6SN7 Thread
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Are 6H7C tubes of use to anyone? I do not need them. I feel bad, the seller is highly rated and is in Ukraine. He doesn't need this. I ran a business in post-communist Poland for a while, I have had much bigger problems in that part of the world. I embarrassed my daughter terribly once, arguing price in the lobby of a ritzy Prague hotel. But the seller had misrepresented something, I deserved a discount.
g0ldl10n
500+ Head-Fier
Those little Aune tube dacs are great! lol.. I really wanna get the 4th generation .. anyone have one they want to sell?Fotons are the reason I started replacing the solder in 6sn7 tube pins. People claimed they needed a super long burn in and I thought that a little crazy so I conducted some experiments with the pins, new solder, and a long test cycle. To the best of my recollection @bcowen who is the resident Foton expert went back and checked some tubes that he had applied the long burn in time to and found they were still acting like they did prior to said burn in. Bill can answer this better but the best Fotons are from the fifties and have ribbed plates. 1952-1957 I think but Bill can answer that better than me.
As best I recall the socket extension is needed on the Vali, the socket on the circuit board sits fairly low and will not allow an adapter otherwise. This is back when I did a lot of experiments with 6J5 single triode tubes, the device in the back had a 9 pin socket closer to the top of the amp so a 9 pin extension was not needed there.
It was fairly idiotic to design incompatible tubes called "6SN7" and "6N7S", in my opinion. I suspect a (Russian) plane has crashed because of this.
H becomes an N, C becomes an S.
Paladin79
Previously MOT: Cables For Less
I agree and as I said I have seen this mistake before. The guy even sent me the tubes but I keep them far away from 6sn7's.
I was able to watch the Antonov, a triumph of Ukrainian and Russian cooperation, being loaded once. A hatch opened to reveal the refueling connections. Notes on the inside of the hatch did not inspire confidence!I agree and as I said I have seen this mistake before. The guy even sent me the tubes but I keep them far away from 6sn7's.
Attachments
Ayaka
New Head-Fier
I found this document some time ago which shows the russian numbering matching: Russion Tube Decoder
If the glass of a tube is slightly moving (when you hold its base and the glass at the same time and try to twist it very gently), it's not good right? I presume it means no more vacuum.... still usable or not??
If the glass of a tube is slightly moving (when you hold its base and the glass at the same time and try to twist it very gently), it's not good right? I presume it means no more vacuum.... still usable or not??
ColSaulTigh
Headphoneus Supremus
Not necessarily. The glass is crimped at the bottom, which is what keep it vacuum sealed. The glass is then glued into the base. Sometimes some superglue or other quick-drying glue will fix the issue. I've never tried it, although I have a KR/RK that needs some love. The vacuum itself should be OK unless there's a crack in the glass or the glass was not crimped/sealed when originally manufactured.
Paladin79
Previously MOT: Cables For Less
It should still be usable, the glue on the base did not hold up. The glass itself is sealed with wire leads protruding from the bottom that go into the pins of the base. Sorry I answered before I saw the previous response and I was adding a pdf of the Russian tube info.
I designed an amp using those Russian GU-50 tubes, German made tubes also work except they use a different keying system.
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g0ldl10n
500+ Head-Fier
Gotta ask - how does it sound?It should still be usable, the glue on the base did not hold up. The glass itself is sealed with wire leads protruding from the bottom that go into the pins of the base. Sorry I answered before I saw the previous response and I was adding a pdf of the Russian tube info.
I designed an amp using those Russian GU-50 tubes, German made tubes also work except they use a different keying system.
Paladin79
Previously MOT: Cables For Less
I enjoy it. I was handed a bucket of parts and needed to build a class A SET amp to win a bet. My friends were impressed and I got to keep the amp. I then went in and replaced wire and specific components. I upgraded the tubes to all Telefunken and that helped. The amp is about 15 watts per channel. I like class A sound so it fits my needs at times. Here Finnegan and I are hooking up a headphone adapter. I ran Russian GU-50’s on that day.
g0ldl10n
500+ Head-Fier
Ahh, I see what's happening here - Finnegan is the brains of the operation!I enjoy it. I was handed a bucket of parts and needed to build a class A SET amp to win a bet. My friends were impressed and I got to keep the amp. I then went in and replaced wire and specific components. I upgraded the tubes to all Telefunken and that helped. The amp is about 15 watts per channel. I like class A sound so it fits my needs at times. Here Finnegan and I are hooking up a headphone adapter. I ran Russian GU-50’s on that day.
Paladin79
Previously MOT: Cables For Less
Well yeah, he is a big help with tubes and electronics.Ahh, I see what's happening here - Finnegan is the brains of the operation!
LobalWarming
1000+ Head-Fier
You're so lucky to have such an adorable assistant that considers GEC 6AS7 as just another disposable bulb that makes cools glass shatter sounds when knocked off the desk. Zen Cataphonics.Well yeah, he is a big help with tubes and electronics.
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