[R-390] Connector pictures

[Robert P. Meadows]

Why not just purchase a new or good used replacement connector from Fair
Radio?
R

-----Original Message-----
From: r-390-bounces at mailman.qth.net <r-390-bounces at mailman.qth.net> On
Behalf Of David Olean
Sent: Sunday, October 20, 2019 12:53 PM
To: John Gedde <jgedde at optonline.net>; r-390 at mailman.qth.net
Subject: Re: [R-390] Connector pictures

Hello John,

I made my own pin out of half hard brass rod. I had some 3/16" dia stuff and
I turned it down on a lathe. The problem is that a 40 thousandths thick
piece of brass will give abit when turning, so any un supported portion can
flex and it is hard to keep a constant diameter as you are turning it down.
The solution is to have a sharp cutter and go slow, with repeated passes to
remove as much material as you can.

I am sure that brass wire in 40/1000ths can be found. I checked K&S hobby
tubing and they have 0.031 and 0.047 (1/32 and 3/64ths) rod. You could
probably put the 3/64ths in a drill and file it down quite easily while
running the drill, and skip having to roll your own on a lathe.

Dave

On 10/20/2019 12:01 PM, John Gedde wrote:
> Hi Dave,
>
> Looks great!  Clever repair.  What did you use as a new pin?
>
> John
>
> -----Original Message-----
> From: r-390-bounces at mailman.qth.net <r-390-bounces at mailman.qth.net> On 
> Behalf Of David Olean
> Sent: Sunday, October 20, 2019 4:58 AM
> To: r-390 at mailman.qth.net
> Subject: [R-390] Connector pictures
>
> 1269.JPG shows the broken pin in the IF assembly.
>
> 11268.JPG shows the new pin after the repair
>
> 1267.JPG shows the IF assy bolted down in the drill press and getting 
> drilled with a #60 drill bit. (0.040" dia.)
>
> Hopefully the pictures made it this time.
>
> Dave K1WHS
>
>
>
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