[Boatanchors] 2013 myth

[J. Forster]

I think there is more myth than fact in this issue.

The BBs have developed a cult following among the electric guitar fand. I
can just see someone taking their vintage amp in for service and getting
it back, and then complaning

"Hey, dude. My amp doesn't sound right!! Whatt'd ya do to screw it up"

"I replaced the leaky caps"

"Put back the originals, to get my sound back  !!!!!!"

When, in fact, the electrically BBs had biased a stage non-linear.

YMMV,

-John

====================




> On 07/07/2013 09:42 AM, J. Forster wrote:
>> I would actually like to see some data on BB's. And I do not mean
>> measuring those that have been removed because they have failed, which
>> will obviously badly skew the stats.
>>
>> Do they, in fact, fail more than other similar caps of the same vintage?
>>
>> -John
>>
>> ===========
>>
>
> Hi John,
>
> That's on my mind, too and it's why I asked. Some of the messages I have
> read BB and other paper caps were tested after a "shotgun" replacement
> and all found to be bad. Leakage has two different meanings in these
> discussions. There is electrical leakage that can pull down the B+ or
> apply DC voltage from a preceding stage. There is mechanical leakage
> when oil and goo escape from the capacitor body. Some hams have
> testified that goo covered caps sometimes were still working well as
> caps. The suggestion is that BB caps fail more often than others. The OP
> in this thread says "not so".
>
> There haven't been very many hard numbers.
>
> 73,
>
> Bill  KU8H
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