[ARC5] BC-348 Dynamotor

[John Hutchins]

Mike, Mark -
I agree with Mike, yes disconnect the filter cap on the HV brushes for 
now and test, the dynamotor running time and voltage.
Back to square one }
Hutch

On 1/2/2016 3:32 PM, Mike Feher wrote:
>
> Mark –
>
> Can you measure the current drawn on the output of the dynamotor with 
> the brushes in but without connecting to the 348? Sounds like maybe 
> one of your re-stuffed capacitors may have blown. Or, just disconnect 
> the dynamotor output from the base, with the brushes in, and then 
> measure the output voltage at the dynamotor.73 – Mike
>
> Mike B. Feher, N4FS
>
> 89 Arnold Blvd.
>
> Howell, NJ, 07731
>
> 732-886-5960
>
> *From:*ARC5 [mailto:arc5-bounces at mailman.qth.net] *On Behalf Of *Mark 
> McKeown
> *Sent:* Saturday, January 02, 2016 4:12 PM
> *To:* ARC5 at mailman.qth.net
> *Subject:* [ARC5] BC-348 Dynamotor
>
> I appreciate all the suggestions.  I have replaced (restuffed all the 
> caps in the base of the dynamotor assembly so it shouldn't be the 
> caps.  I am running the unit on the bench using a 24 volt supply.  The 
> supply is regulated and isn't pulled down by the dynamotor.  A 
> vibratach says the unit is running at 5000 rpm which may be reasonable 
> although higher than specified.  The armature gets hot with the 
> brushes out of the high voltage end but you can still touch it.  With 
> the brushes in I get 103 volts out instead of the 226 or so 
> specified.  The entire unit gets too hot to touch when the high 
> voltage section has the brushes in it.  I disconnected the hot leads 
> from the dynamotor to the base wiring and still only get 103 volts.  
> Any more ideas?  Thanks!
>
>
>
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