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Old 25th May 2007, 05:33 AM   #1
mb3k is offline mb3k  Canada
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Default Plate Caps for 832A

Does anyone know of any tube caps that can fit the 832A, or can recommend modifications of existing plate caps?

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Info on the tube here: http://tdsl.duncanamps.com/show.php?des=832A
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Old 25th May 2007, 06:30 AM   #2
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I don't believe thay make such a thing. What I'd do is get a couple of Fahnstock connectors, and use those to connect to the plate pins. (Also looks like they're due for a good cleaning.) Granted, they're not insulated, so you'll have to cage those beasts to eliminate the shock hazard.

The other possibility is to have a couple turned from brass rod stock. These can even be made with cooling fins (which is what you'd do if using them as RF amps, or audio if you're pushing the max ratings). The connections would be made with small set screws. Again, you'll have to cage 'em.
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Old 25th May 2007, 01:39 PM   #3
alexg is offline alexg  Philippines
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I will be doing an 832A PP and the best suggestion I found is using the female pins of a computer hard disk power connector and crimping it a bit to fit the "horns". Then using shrink tubes to insulate it, a couple of layers should be enough.
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Old 25th May 2007, 02:04 PM   #4
56oval is offline 56oval  Australia
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Angela Instruments sell new anode top caps drill out the orignal cap hole to suit a new anode cap and cut the pin to suit the new hight.
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Old 25th May 2007, 11:02 PM   #5
mb3k is offline mb3k  Canada
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Nice thoughts guys...
I've searched the net and found only pictures of "normal" ceramic caps on the 832A but no part numbers or sizes. I was thinking I could purchase ceramic caps then solder in hard disk female pins into the caps which would make it look pretty and all. and trim down the 832 pins to fit.

Here's some pics I found on the net
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Old 26th May 2007, 07:31 AM   #6
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Roehrentechnik in Germany produces such adaptors for ceramic caps

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Old 26th May 2007, 07:18 PM   #7
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The Rusian Priboi-tube 6R3S have the same "korns" and I have bought conbnectors for that one in Russia. Hower the 6R3S horns are a bit shorter that those on 829 and 832.
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Old 29th May 2007, 05:17 AM   #8
Macao is offline Macao  Viet Nam
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Hi all,
I'm just collect some 829B/832 plate cap for my 829B amplifier, the are show in attach photos for all reference. Those caps are purchased from old military warehouse and rarely to find.
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File Type: jpg plate_cap.jpg (8.1 KB, 636 views)
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Old 29th May 2007, 06:20 AM   #9
Macao is offline Macao  Viet Nam
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One more photo: 829B tube with plate caps.
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File Type: jpg 829b_cap.jpg (13.7 KB, 439 views)
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Old 29th May 2007, 07:37 AM   #10
alexg is offline alexg  Philippines
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Quote:
Originally posted by Macao
Hi all,
I'm just collect some 829B/832 plate cap for my 829B amplifier, the are show in attach photos for all reference. Those caps are purchased from old military warehouse and rarely to find.
Cool, those are nice caps.

Can you post schematics of your 829/832 amps? Thanks.
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