[ARC5] Dynamotor Capacitor

[Mark K3MSB]

Hi Richard.

I haven't tested it yet.  While I can test its value, I don't have any
equipment to do a leakage test that will do above 600 VDC.

I also don't know if the capacitor is mica or waxed paper (and the photo on
my phone doesn't show any markings - they're probably on the other side).

I could jin up a test circuit with a 2 KV transformer, millimeter etc, but
all things considered, I was just planning on replace the cap.

Fear not, the original cap will be saved with the other original caps I
yanked out of the 456.   I don't throw original pieces away, they go into a
baggie for storage and perhaps eventually re-stuffing (although I did
re-stuff the 2 big square caps in the 456).

73 Mark K3MSB

Sent from my Android phone
On Mar 24, 2014 9:58 PM, "Richard Schumann" <richardschumann at comcast.net>
wrote:

> Are the original caps still usable or do they need to be replaced?
>
> Thanks,
>
> Richard kn7sfz
>
>
> On 3/24/2014 6:41 PM, Mike Feher wrote:
>
>> The back EMF spike at every break of the brushes can have extremely high
>> voltage spikes. 73 - Mike
>>
>> Mike B. Feher, N4FS
>> 89 Arnold Blvd.
>> Howell, NJ, 07731
>> 732-886-5960
>>
>>
>> -----Original Message-----
>> From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net]
>> On
>> Behalf Of Mark K3MSB
>> Sent: Monday, March 24, 2014 9:35 PM
>> To: ARC5
>> Subject: [ARC5] Dynamotor Capacitor
>>
>> I just finished a complete rebuild of the dynamotor for my BC-456.
>>
>> I'm curious why the  0.006 uF shunt capacitor across the 28V side is a 2KV
>> cap.  That seems awfully high.
>>
>> 73 Mark K3MSB
>>
>>
>>
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