[R-390] R-390A set screw size

[Chris Kepus]

Has anyone bothered to replace the Bristol set screws in the R-390A with
allen or socket headed set screws? Purpose of same would be to simplify and
standardize things for the next time a knob would have to come off, etc. 

Does anyone know the thread size of these set screws?  4-40, 6-32, 8-32 ????
In looking at the McMaster-Carr set screw selections, one could use the
"flat" or "oval" point set screws to avoid the shaft marring problem, but I
wonder if the holding power is sufficient with these. 

My dream would be that one of you out there with lots of different
equipment, i.e., R-390, 75A-X, 75S-X, 51J-X, Hallicafters, Drake, etc., has
already written down the Bristol wrench or allen wrench size needed on every
knob of their equipment and, most importantly, is willing to share the
knowledge, or knows where on the web it is located.....
  
And while I'm at it, my dream (actually is part of the same dream already
mentioned) is to find the person who has a list, by receiver, of all the
capacitors needed to recap same and, most importantly, is willing to share
the knowledge, or knows where on the web it is located.....  

Do I feel lucky, or what?

What say?
73 and HNY,
Chris
W7JPG



-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of Tom Norris
Sent: Saturday, December 29, 2007 6:19 AM
To: r-390 at mailman.qth.net
Subject: [R-390] Fwd: R-390A's for sale cheap

Dave Bock" <bock at marketcommander.com> has a few items for sale.

Contact him and not me.

73

Tom NU4G


Begin forwarded message:

> From: "Dave Bock" <bock at marketcommander.com>
> Date: December 27, 2007 8:59:28 PM GMT-06:00
> To: <glowbugs at piobaire.mines.uidaho.edu>
> Subject: GB> Moving out some real heavy iron
>
> FS
>
>  Local Pickup only. Romeo, Michigan. 30 Miles north of Detroit.
>
>
> Contact off list. Nobody in any hurry here either. Stuff too heavy  
> to move
> and work on anymore.
>
> Buy the lot and share with your friends.
>
> 1) Collins plated R-390A with covers/meters @ $375
> 2) Collins plated R-390A with covers/meters @ $375
> 3) Motorola plated R-390A with meters with original shock mounted  
> cabinet @
> $550
> 4) 2 Collins R-390A PTO's @ $25 for both
> 5) 2 IF modules with filters and one without for R-390A @ 50 for all
> 6) 1 hanger queen for parts and crystals @ $25
> 7) Bendix T-368E with SS rectifiers, SS line driver and D-104  
> (lower blower
> bearing needs replacement)
> fresh modulators and final and spare 6000 driver tube @ $1,400
>
> This beats all prices going these days but then I do not have to pack
> anything either.
>
> But lot price is $2,500 take all.
>
>
>
> Dave WA6PRL
>
>
>
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