Re[Hallicrafters]V24#22- Cap ID
Phil Barnes-Roberts WA6DZS
wa6dzs at charter.net
Wed Jan 18 17:43:14 EST 2006
hallicrafters-request at mailman.qth.net wrote:
> Subject: Re: [Hallicrafters] Another Cap Identification
> From: Roy Morgan <roy.morgan at nist.gov>
> Date: Tue, 17 Jan 2006 13:27:42 -0500
> To: Rich Soennichsen <rsoennichsen at gmail.com>
> CC:
> At 10:31 AM 1/15/2006, you wrote:
>
>> This appears to be a molded paper cap in my SX-42:
>>
>> http://members.cruzio.com/~soennichsen/cap
>>
>> I tried to identify it via this chart but it does not seem to make sense:
>
>
>
> That is a classic BLACK BEAUTY, aka Bumble Bee capacitor.
>
> Get rid of it.
>
> Orange - orange - yellow
> 3 3 0000 Pf
> or .033 uF
>
> Roy
>
> - Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
> 7130 Panorama Drive, Derwood MD 20855
> Home: 301-330-8828 Cell 301-928-7794
> Work: Voice: 301-975-3254, Fax: 301-948-6213
> roy.morgan at nist.gov --
I agree with Roy, it's definitely the 'Bumble Bee' version of the molded
Black Beauty (Of Death) paper cap - which is worth replacing sooner
rather than later. Moisture gets into the paper over years, and they
fail, sometimes catastrophically, taking other (expensive) parts with them.
The colors (on my -ViewSonic 21- monitor) look like Red-Red-Yellow,
though, which would be .022uF!
If you can, it's probably worth trying to measure it after it's out of
the circuit - and check it against the schematic and parts list for your
radio, before replacing with a (potentially) wrong value.
Looking at the parts lists I've collected here (from BAMA and
elsewhere), there are 16 caps .02 +40-15% 400V, and no .033's at all.
Check your particular model's mods/service notes before jumping!
Not always easy to tell from differences in solder workmanship, but it
could also have been a substitute by a previous repairer. Depending on
the particular part of the circuit, some variation in 'field-expedient'
replacements have been known to work just fine. Enjoy it, and let us
know how it goes!
--
73, Phil Barnes-Roberts WA6DZS mailto:wa6dzs at arrl dot net
All else aside, RF to the other fellow's antenna is what counts.
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