[MRCA] [Milsurplus] [ART-13_Transmitters] Working on my ART-13's

[John Hutchins]

On 2/14/2012 3:26 PM, Mike Hanz wrote:
> On 2/14/2012 3:53 PM, J. Forster wrote:
>> I should have added that. I leave the supply connected for several hours
>> at least. If there is no smoke coming out of anything, I kill the B+ and
>> feel each of the caps to see if they are warm/hot. It is unwise to do this
>> with B+ applied, IMO.
>>
>> In many sets, this is easy because all you have to do is not apply
>> filament power.
> The only reason I go the extra mile with the heat gun is that even if
> the cap has been operating satisfactorily with low leakage for 3-4 days,
> a touch of heat has quickly driven a couple of them to failure in my
> experiments.  That shouldn't happen with a good capacitor.  The
> dynamotor junction box normally operates at a pretty warm temperature,
> so they have to be able to take the heat...no pun intended. :-)
>
> I wonder what the effect would be to simply dispense with the interior
> dynamotor caps in operational setups and mount them externally?  It is
> certainly true that they should be as close to possible to the hash
> generating elements like brushes, but perhaps a small external doghouse
> on the dyno output and input connector back shells might be a
> consideration.  I'll have to try that one of these days...my good
> original stock is running out like everyone else's...
>
>    - Mike
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List -
Cant you simply replace with a ceramic cap the brush caps?
Hutch