[ARC5] Dynamotor Capacitor

[Mike Feher]

Gee, what a coincidence. The windings are inductive. Ever hear of "hash"? 

Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960 

-----Original Message-----
From: J. Forster [mailto:jfor at quikus.com] 
Sent: Monday, March 24, 2014 10:16 PM
To: Mike Feher
Cc: 'Mark K3MSB'; 'ARC5'
Subject: Re: [ARC5] Dynamotor Capacitor

That only applies if the dyno is supplied by a source w/ considerable
inductance, like a generator or a long length of wire.

If the dyno is w/in a foot or two of a car batter or other low impedance
supply, you don't see big spikes.

-John

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



> 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
>
> Sent from my Android phone
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