[R-390] Collins R 389 PTO

[Cecil Acuff]

Well if I can find a 389 in reasonable shape with a munched PTO and maybe a 
2nd munched PTO that all was also reasonably priced I would be happy to make 
an attempt to develop a method to rehabilitate the original PTO's.

But it appears only functioning 389's are offered for sale...or ones with no 
PTO included at all which is no help!

Cecil Acuff
K5DL
----- Original Message ----- 
From: <Flowertime01 at wmconnect.com>
To: <R-390 at mailman.qth.net>
Sent: Tuesday, May 05, 2009 4:40 PM
Subject: Re: [R-390] Collins R 389 PTO


> Bill,
>
> R389 did run into a to least a couple 1000 built.
> We think there may be 25 units at current time that need a VFO.
>
> Down the other path, what are the chances of mixing core stuff and epoxy 
> to
> make a new core?
>
> We could do a cold glue core and machine it to size and thread that would
> fit the shaft.
>
> Then we would have to do a new coil form and wind a coil.
>
> We could select the new core outside diameter to fit a stock core form.
>
> I cannot imagine how many test coils would need to be wound to get the
> inductance and linearity close enough to be usable.
>
> Roger AI4NI
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