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These are the archives from Mark Longo's original Hammond List, 1994-97



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Re: Start motor fails to engage



At 11:38 PM 8/31/96 -0800, you wrote:
>Hi all,
>
>I'm trying to help a little old lady get her M-3 working again.  It's fine
>except that the start motor fails to engage the tone generator gear.  It
>turns and moves toward the gear, but just barely fails to engage.  If I
>push it into the gear, it starts the organ just fine.
>
>My question: can the present motor be fixed, or is a new one required?
>I've never encountered this problem before.
>
>Also, she persuaded me to cart away what I discovered to be a Hammond Type
>F power amp with full tube complement of 2A3s and 56s.  I checked it out
>and powered it up with the rectfier out (I don't trust high voltage caps
>quite that old, and I have no speaker coil load for it).  I measured 520VAC
>across one half of the power transformer, but only 340VAC across the other
>side.  (I can't measure the rated 1050VAC with my digital meter).  I
>suppose this means that the power transformer's high voltage winding is
>screwed up somehow.  The filament supplies were fine.
>
>The 2A3s measured around 78%, while the 56s and 5Z3 rectifier measured like
new.
>
>Any ideas on what to do with this thing other than make it into a piece of
>living room art?
>
>Regards,
>David Anderson
>
>
>
>You just have to spray the sliding gear on the start motor shaft with some
type of degreaser (I use just a TINY bit of contact cleaner) to free the
gear so it slips left and right freely, then put a few drops of oil on the
shaft and and the gear teeth and you should be in business.

DDH


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