[R-390] Collins R 389 PTO

[Cecil Acuff]

I'd love to hear our member Bob Camp's view of this issue.  He is an 
oscillator man for a living and may have an interesting solution or two...

Cecil
----- Original Message ----- 
From: "Robert Nickels" <ranickel at comcast.net>
To: "2002tii" <bmw2002tii at nerdshack.com>
Cc: <r-390 at mailman.qth.net>
Sent: Monday, May 04, 2009 10:00 AM
Subject: Re: [R-390] Collins R 389 PTO


> 2002tii wrote:
>> Mine would create a
>> strong heterodyne two doors away when my neighbor tuned in his
>> political talk shows and blasted them out the window so he could hear
>> them in the yard.
> One wonders how you would know this, Don  ;-)
>
> While the digital VFO ideas surely have merit,  it seems to me that a
> simpler approach would be a heterodyne analog approach, mixing the
> output of a fixed crystal oscillator with a a variable one to get the
> desired tuning range.  The variable could be another PTO or a
> conventional oscillator, of course the tricky part would be to get the
> mechanics to match up so the digital readout would be accurate.  Or
> something like the AADE digital dial would be an option.
>
> I haven't been able to follow this thread closely so I assume someone
> has probably already suggested this, but in any case, it would sure be
> worth the effort to find a way to get a otherwise usable R-389 back in
> service.
>
> 73, Bob W9RAN
>
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