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Re: [Amps] Alpha 76A "hums on 160" problem resolved

To: w7ry@centurytel.net, amps@contesting.com
Subject: Re: [Amps] Alpha 76A "hums on 160" problem resolved
From: Jim Barber <audioguy@q.com>
Reply-to: audioguy@q.com
Date: Sat, 19 Oct 2013 09:59:39 -0700
List-post: <amps@contesting.com">mailto:amps@contesting.com>
Thanks, Jim.

Allied has Vishay .01uF 6KV units in stock for $3.44 .
I'll get a batch next time I order; seems they're getting hard to find.

73,
Jim N7CXI

On 10/19/2013 7:52 AM, Jim W7RY wrote:
I too have had those .01 6KV Chinese caps short. It can take a while but
they eventually will short. They have about a 50% failure rate with me.
Its a matter of when they short... Not if they short. One was in a
TL-922 with 3200 volts on it.

Mouser has .0047 (4700pf) 6KV Vishay/Sprague caps for a couple of bucks
each.

Good luck with thoes
73
Jim W7RY



On 10/19/2013 1:06 AM, Jim Barber wrote:
Replaced the two .002uF caps at the "cold" end of the larger plate
choke with two .01uf 6KV blue Chinese caps in parallel. (It's what I
had, don't tell Carl...)

. Replaced the two .002uF caps at the "cold" end of the smaller 15uh
plate choke with two .01uf 6KV blue Chinese caps in parallel, as above.

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