[ARC5] Dynamotor Whine

[Mark K3MSB]

Hi Joel –

Remove the ends of the dynamotor.  You’ll see a 0.001 uF bypass capacitor.
Replace it and see if that helps.

I’d also recommend carefully cleaning the commutators.  I used a #2 pencil
eraser and it worked fine.

Clean and repack the bearings while you’re in there.

73 Mark K3MSB

Sent from my Android phone
On Oct 14, 2013 12:21 AM, "Joel R Roberts" <joelroberts001 at comcast.net>
wrote:

> Does Anyone know how best to get rid of the dynamotor whine in the
> receiver? I left the RF and Audio Filters in place in my R-26/ARC-5 and
> have it running from a 24vdc power supply. I would think some sort of
> filter caps or perhaps the dynamotor needs rebuilt. Thanks
> everyone.......Joel R Roberts KB0FPT
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