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Author Topic: Loose 572B Plate cap  (Read 2131 times)
W4OP
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« on: November 07, 2011, 06:02:59 PM »

One of my 572's plate cap is a bit loose. Is there a hi temp cement that can be used to secure it?

Tnx,
Dale W4OP
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AD4U
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Posts: 2173




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« Reply #1 on: November 07, 2011, 06:07:12 PM »

Over a year I repaired a loose plate cap on a 8950 tube in a Swan 700CX with JB Weld.  Even with the extreme heat, so far so good.

Dick  AD4U
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AG6K
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« Reply #2 on: November 07, 2011, 07:57:51 PM »

One of my 572's plate cap is a bit loose. Is there a hi temp cement that can be used to secure it?

Tnx,
Dale W4OP

  Dale -- General electric, red/hi-temp silicone rubber bonds to glass if the glass i's cleaned with acetone or methyl ethyl ketone.
Rich, ag6k
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NJ3U
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« Reply #3 on: November 09, 2011, 05:02:18 AM »

OK, so now we have the cap afixed,  any pointers on the electrical connection ?  Silver / Lead / Resitance soldering ?
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W8JX
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« Reply #4 on: November 09, 2011, 06:01:46 AM »

You should have silver solder it BEFORE you glued it to envelope to minimize heat transfer during soldering. I would use tin/lead solder now.
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