[R-390] Another "Close to Perfect" R-390a

[Les Locklear]

It was /is a known problem with the 51J series pto's, but they had other 
problems, 12 kc off wasn't un common. Theory seemed to be you either had a 
good one, or you didn't.

I must have been lucky, had several 51J3's (R-388) and 2 51J4's, all were 
good.

Les Locklear
Monitoring Since '57
Located On the Gulf of Mexico
Gulfport, MS.
http://www.hammarlund.info/homepage.html

----- Original Message ----- 
From: "Bill Hawkins" <bill at iaxs.net>
To: <R-390 at mailman.qth.net>
Sent: Thursday, March 02, 2006 12:50 AM
Subject: RE: [R-390] Another "Close to Perfect" R-390a


> Well, I worked on two R-389 PTOs for linearity. Can't get much
> more Collins or much older than that. They were within 500 cps
> of linear without being touched. Maybe the "cost-reduced" (that
> is "cheaper") R-390A had that problem.
>
> They're gone now...
>
> Bill Hawkins
>
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