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#32
10-03-2010, 11:28 PM
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Wow! The winning bid was $932! Wonder who got it
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#34
10-05-2010, 01:13 AM
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Don't know who got it. Very early on I had some vision of salvaging the 20BP4 from it if no one bid on it. That obviously wasn't an opportunity that arose!
I did, however, get the seller to send me the pictures so I could post them at Radiomuseum. He kindly agreed. Now there are at least some real pictures of the set where people will always be able to find them. http://www.radiomuseum.org/r/dumont_...20_ra_106.html Tom P.S.: If any other DuMont owners out there have some pictures that could be posted there with the various DuMont models, let me know and we'll arrange to get them posted.
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#35
10-05-2010, 11:22 AM
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I have a ratty, though complete RA-103C I haven't restored yet..
Want any pictures of it? Bill Cahill
__________________
"Tubes are those little glass things that light up orange unless there is a short.. Then they light up all pretty colors..." Please join my forum. http://www.tuberadioforum.com/
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#36
10-05-2010, 01:28 PM
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Bill,
Sure - that would be great to have pictures of. I'll send you a PM with my email address. Tom
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#37
10-06-2010, 11:25 AM
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Quote:
It's my only Dumont, I presently had a little loose funds, and I'm glad I have it, come what may. And since it's just down the thruway from me in Syracuse, I won't have to worry about shipping costs or worse- damage. Hope I can bring it back to life eventually. A little elbow grease should help the appearance for now. Bob Hodge
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#38
10-06-2010, 12:47 PM
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Way to go, Bob! Hope that 20BP4 is AOK.
__________________
John Folsom
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#39
10-06-2010, 06:55 PM
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If that 20BP4 turns out to be bad and you are interested in rebuild... I have a 20BP4 which is bad that I want to rebuild at RACS in France. Shipping is very expensive (as is the rebuild), and pooling several of these large Pyrex tubes in a common shipment would save each person hundreds of $.
Shipping within the U.S. by FedEx Ground is very cheap. The problem is overseas shipping, and that is where we can save by pooling. So we should ship within the U.S. to one location and send combined to France by overseas freight. I've mentioned this on many occasions, and I'm reasonably patient to wait for a plan to come together, but I don't want to wait for ever...
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#40
10-07-2010, 12:55 PM
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Quote:
And if it needs to be rebuilt, I'll keep your offer in mind! Any idea of the cost of the rebuild? Could it be rebuilt if it has gone to air? I will have a tempered moment of rejoicing if the getters are still good. Very Cordially Yours!! Bob
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#41
10-07-2010, 01:00 PM
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I'm curious-with the larger crts, did they take the same gun as what went into a 10bp4, for instance? If so, did that mean the 20" tube would wear out faster as the cathode had to emit more material to cover the larger screen area?
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#42
10-07-2010, 01:10 PM
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Voltage as well as current density affect brightness, so if the larger tube is run at a higher voltage, decent brightness could be produced without increasing cathode "loading". There is a limit to this, however, especially in un-aluminized crts.
jr
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#43
10-07-2010, 02:27 PM
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RACS rebuild is somewhere in the 750 Euro range for a Pyrex 20BP4. I was hoping people would get mobilized earlier this year while the dollar was strong so that the price wouldn't be so high in dollars, but alas that didn't happen and the dollar is falling now. So that's about $900-1000 at the moment for the rebuild.
RACS does a full rebuild with new phosphor and aluminization, so there is no problem with rebuilding tubes that have gone to air. Shipping, if you try to ship just one tube yourself, is somewhere in the $600 - $1000 range. That's why we have plenty of incentive to pool. The total shipping price will be the same, pretty much regardless of the number of tubes, since it will be an overseas surface freight shipment on a pallet. It will be cheaper if we pool our tubes and ship from the east coast or Great Lakes region, rather than the west coast. Obviously this isn't cheap, but if you have a valuable Pyrex tube to rebuild, it's the only game in town -- or more precisely, in the world.
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#44
10-07-2010, 02:44 PM
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Quote:
jr
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#45
10-07-2010, 04:31 PM
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That's probably a matter of taste. I'll probably go with aluminized, but one could presumably have the option to choose no aluminization and bent gun for more historical authenticity.
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