[R-390] Autopsy of a bad PTO.

[Phil Atchley]

Jim et al...

> This is a real hard introduction for a new 390a owner, but once you =
have=20
> accomplished the PTO initiation, you will be a true member of the=20
> fraternity.  Good luck!

Well, this is R-390A number either 5 or 6 (you tend to lose count as you =
get
older) that I have had and overhauled here (one belonged to a friend).  =
In
fact, come to think of it, over the years this one may actually be =
number 7
overall.  That doesn't include one Junker that was parted out and an =
R-391
autotune unit that I obtained and sold without repairing it.  I just =
can't
stay away from the things!! When one arrives at the house one way or =
another
and I show it to my wife, she just looks at it and says, "Yep, another =
big
gray radio". =20

This is just the first one that I EVER had this many problems with the =
PTO.
All the others except one had Collins PTO's.  The lone exception was an =
EAC
belonging to a friend.  That one had a Cosmos PTO which, after a little
tweaking lined up on the end points and the 100 KHz calibration spots =
were
in tolerance (didn't check the 25 KHz points).  So, I've done a few of =
these
critters.

73 de Phil, KO6BB
DX begins at the noise floor!
k06bb@elite.net
Merced, California
37.18N  120.29W  CM97sh





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