I bought some new Chinese 811A's a few years ago, and put them in my MINT Warrior Heath amp. That thing was a beauty to behold, paint like from the factory, everything about it was great......In less than 2 hours of very conservative(<350 watts out intermitent) operation, they shorted out, blew the transformer and fried my pride and joy into an 80 lb.pile of useless junk. Try some of the Chinese hardware items if you think THAT is bad.....I have been VERY upset by the importation of these materials into this country......
"Clear intent is the best predictor of experience"
I work for one of the local company in Bucharest,Romania.I am an electronics engineer.I repair LCD monitors,LCD TV,plasma TV and music systems made in China.All things from China are very low quality.I have many vacuum tubes made from China but all are very low quality.I have four 811 made in the USA,all four are very high quality.I have two 813 made in the USA and two 813 made in Japan,all four have the same characteristics.I prefer tubes manufactured in the USA,Russia,Japan but no China.
Licensed since 2000
Chinees things made solid and last forever, it is like my D3X camera monitor protection cover, as soon as I bought it and fitted it to my camera viewfinder monitor and went photographig, it felt down without noticing it and got lost.
I am glad my site VB software is not made in china.
now with true viterbi decoder!
Bought a distributor wrench once for the hold down bolt on a Chev 350. Broke three of them in a row in one day. They were Chinese made.
Try some of the Chinese hardware items if you think THAT is bad.
On the positive side, I did get it loose with a regular wrench and some fighting with it and never did crack a knuckle!!
"Oh what a tangled web we weave when first we practice to receive."
-Otto Watt Sept. 5 1925
I think your tubes were just celebrating Chinese New Year.
NOS RCA-811A's from the 1960s often bring high prices, but here's some (allegedly NOS) on eBay right now:
I see many places selling "NOS RCA 811As" from the 1960s for as much as $85 each in some cases. I don't know they're really worth THAT, since you can buy 572Bs for less.
But there's no doubt when RCA stopped making 811As in the U.S., that marked the very end of the last production run of high quality 811As. And that was about 40 years ago...
From the pictures posted they do not look like Chinese tubes to me, the writing is Cyrillic Г-811 (G-811) which is the Russian designation for an 811A equivalent and the logo is not Chinese Shuguang, its an obscure Ryazan electronic factory.
Originally Posted by N0WVA