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Old 17th June 2007, 10:29 PM   #1
Pyre is offline Pyre  Canada
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Default Anyone seen these 6L6gc's before?

I got these 6L6gc's in a bunch of nos tubes that I bought a while back. I cant say that I have seen 6l6gc's like them before and cant seem to find anything about westinghouse 6L6gc's online. They kinda look like the old coke bottle tung sol 6L6's. has any one seen these before or know anything about them?

Thanks

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Old 17th June 2007, 10:46 PM   #2
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They look russian or chinese. Maybe an order that Westinghouse had to subcontract out?
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Old 17th June 2007, 10:53 PM   #3
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I have not seen this exact shape of glass yet, but the internals and the brown base match the Chinese Shuguang (Sino) 6L6GC's that I have been getting. They have been available in two different glass envelopes. You may have found a third. I have seen Shuguang tubes relabled as Westinghouse before. I bought some 5AR4's from a reputable seller who told me that they were Chinese. These tubes seem nearly indestructable, but don't sound as good as NOS RCA's. They are far cheaper, often $5 or less.
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Old 17th June 2007, 11:19 PM   #4
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I think you may be right there they look exactly like the ones in your picture. The Westinghouse label looks like it was kinda printed on half heartedly later. They sure rattle a lot when I tap them. I put them on one side of my amp and they sounded ok, quite similar to the Sovtek 6l6gc. The RCA black plates I have blow them away.
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Old 17th June 2007, 11:45 PM   #5
Salas is offline Salas  Greece
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Mr. Westinghouse, the only one who endorsed Mr. Tesla, half responsible for the second industrial revolution based on AC, ending up as a fake Chinese print. Oh tempora, oh mores!
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Old 18th June 2007, 06:32 AM   #6
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My money is on chinese too. Probably after Westinghouse ditched their tooling, and had to fill some contracts...
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Old 18th June 2007, 07:54 PM   #7
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$20 on Chinese with the "Westinghouse" name and boxes being a 100% forgery
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Old 19th June 2007, 01:51 PM   #8
Pyre is offline Pyre  Canada
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I guess they had to do something back in the day before LV handbags became so popular.
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Old 24th June 2007, 12:10 AM   #9
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Saw this late.

Mmmmmm.... As a 6L6 man, I hesitate between 6L6GC and 6L6GB here (Pa for ...GC = 30W, for ...GB = 23W. One of the ...GC features is a quite rigid mounting of the internal structure on pins that go right through to the base pins, not mounted on a glass tongue as here. Also the ...GC has a higher Va rating due to 1/4 circle slots cut in the mica ends between the anode mounting pins/lips and the rest to increase flash-over/leakage. I looked as best I could but did not notice such slots - also the plate is not "ribbed" to increase rigidity.

But Tubelab has a lot of experience and rated them before as nearly indestructable. I would trust that - not sure of voltage tolerance though.

Tubelab,
What about high voltages?

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Old 24th June 2007, 01:28 AM   #10
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Enclosed is a picture of the latest version of this tube. They stuffed the same internals (minus the top getter) into an envelope that is thinner and shorter than the previous design. Maybe they saved 1 pennys worth of glass. The result is obvious. With less room and less glass surface area, the insides get hotter for a given dissipation. They just start to show color in a dark room at about 35 watts. The old Coke Bottle version showed red at 39 watts. I have tested 8 different tubes from the new version in a SimpleSE which runs 465 volts of B+. This puts about 410 volts across the tube (cathode bias and OPT loss). None of the tubes objected, but I have not done extensive testing.
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