> Date: Thu, 24 Nov 2011 09:17:14 -0800
> From: Jim Brown <jim@audiosystemsgroup.com>
> Subject: Re: [Amps] best deal for Mallory caps?
>
>
> On 11/23/2011 12:53 PM, Pete Soper wrote:
>> I need several replacement caps for my Ten-Tec Titan 725, Mallory
>> CGS401T450R5L (long/slim 400mf 450vdc/85c). Newark wants $29 each. Is
>> there a better deal available?
>
> Another important point. It's rare for all of the caps in the series
> string to fail. Only one gone bad will cause lots of hum. I use my
> trusty Simpson 260 on the middle Ohms range to read charge and discharge
> current as I reverse the leads, and compare each cap to the others. A
> bad one will have a lot less charge and discharge current. I have three
> Titans, so I've been through this several times. Only once when I've
> replaced one has another one come up bad in the string.
>
> 73, Jim K9YC
That test is about 1% better than nothing. There are plenty of decent cap
testers on the vintage gear market that will test at rated voltage instead
of a battery. I use a CDE TC-6A but many others are fine for this test
including the military ZM-11A.
Then you wont be surprised by another one soon failing.
Carl
KM1H
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