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In Reply to: RE: Socket Mounting posted by rogerh113 on June 07, 2015 at 20:18:02
I'm not sure all the US sockets will show a brand name. However, the pin contacts are formed differently than the ones you have, and no American manufacturer ever gold-plated their sockets. I just ran over to eBay, and all the US-made 211/845 sockets look old and tired at the moment. Be patient and you'll get a good pair, even if you have to buy them one at a time. Vintage octal and 9-pin sockets are easier to find, although they frequently sell for more than I think they're worth. Belton sockets have also been recommended by Jim McShane as a good modern replacement for octals and miniatures.
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Buy Chinese. Bury freedom.
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The Mind has No Firewall~ U.S. Army War College.
Just to confirm, are you sure it wasn't done after the fact by someone else? I'm also curious how tubes this large (i.e. slow) would be used in radar. Do you have any more info on the origin or use of those sockets (I didn't see your previous post)?
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Buy Chinese. Bury freedom.
Edits: 06/12/15
Here is the link from AA forum... The British invented RADAR and as you know... the lower the frequency the farther the range... a triode would be more than sufficient, the antennae plays just as big a part as it should match the frequency being beamed, moreover the technology progressed to the cavity magnetron, the beginning of fast food via microwave.
As an aside, {as I have learned} a 6SJ7 may be electrically very similar to a 77 or 6C6... the fact remains, aurally the 6C6 will soundly trounce the 6SJ7... pun intended. As usual, more is going on than just reading by the numbers. Size of the plate for older tubes making a difference?
Perhaps.
The Mind has No Firewall~ U.S. Army War College.
Edits: 06/24/15 06/24/15
Thanks for your help in this. I am fine with patience - for some reason I have a strong aversion to Chinese products, so any inclusion would be from ignorance rather than intent. There are some nice NOS vintage sockets out there, and the prices are higher but not prohibitive. Any particular brands I should look for or avoid. I think I am going to stick to ceramic.
Thanks -- Roger
Some users have reported odd noises or susceptibility to vibration associated with ceramic sockets (octals and miniatures). I can't confirm that, but almost all my vintage sockets are bakelite or similar. The only exceptions are ceramic octals that I use for high voltage applications (more than +750V). Good luck with your project!
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Buy Chinese. Bury freedom.
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