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Hi, I just picked up a tube at the flea market and am looking for a little information on it. It is a Western Electris 212D, with a brass base and it looks like it was drawn(tipped) at the top of the tube. It has what appears to be a brown bakelite disc at the base, through which the 4 pins protude. It is crimped in by the brass base.Any idea what it was used for, and what its worth?
Follow Ups:
So any ball park on what it is worth?
Oh, and the filiment is good. I have looked for these on the 'net, but have not found any for sale to get a idea of price.
212s are very rare and are something of a cult item in Japan so pricing them is going to be difficult. One vendor has STC4212E at $USD1500 each NOS. These are claimed to be the best of the 212 series.Your ex-flea market example is likely to worth somewhat less but still way more than you paid for it. Ebay maybe? - you'll need to test it first. Take care with the 2500volt B+. The filament takes 14V at 6A - I suppose you could fire it up with a 13.8V ham radio supply.
Not compared to say 849 or 851.Tube world has been sitting on those STCs for a couple years. Obviously priced too high.
I bought (well, brokered) a deal for 10 STC 4212E's not long ago, all NOS/new in box, tested/guaranteed for $500/ea and there were more where those came from.
The Japanese tube market is not really all that realted to the US market unless you are buying from one and selling into the other. Tubes in japan are usually a good bit more $ than here, for some reason.
I have long hankered after a quartet of 212Es for a PP monster.No way I could afford it at $1500 a pop. Even at $500 it's too much for now but if my fortunes change I'll be in touch.
I had a friend who is a old tube hand look at it today. He pointed out that the brass base has no scratches in it, so it appears to be new/unmounted. His best guess was that it was made before 1927 or so, since thats the latest date from which he has seen a BBT tube. I tested the filament and it measured about 20 ohms resistance.The next challange is to find a market, forum, classifieds or some sort of contact where I can find a buyer. I am a little leary of e-bay and foriegn bidders, and I am also not kean of e-bays' fees.
... how about $50? ;-)20 ohms seems high for fil. resistance. you can figure out the date from various books and patents. I have the info but not here at the moment. The age range is about right, 1920s-30s.
-Ed
I had a friend who is a old tube hand look at it today. He pointed out that the brass base has no scratches in it, so it appears to be new/unmounted. His best guess was that it was made before 1927 or so, since thats the latest date from which he has seen a BBT tube. I tested the filament and it measured about 20 ohms resistance.The next challange is to find a market, forum, classifieds or some sort of contact where I can find a buyer. I am a little leary of e-bay and foriegn bidders, and I am also not kean of e-bays' fees.
...a fortune if it's a worker ! Good find
...FB
first thing to check is filament continuity with a volt/ohm meter. I have no idea which of the four pins is supposed to be connectted, but there are not too many permutations and combinations to try. if you can't get a fairly low non-zero reading between two of the pins you have a dud with an open filament.
regards,
Douglas
Beware the man who behaves deceitfully towards others, for there is nothing else to save you from his deceiving you
If you look at the base with the locating pin at the top the four pins form a shape like a crucifix. The filament pins are the two side ones.
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