[R-390] Front Panel Screws

[Roger Ruszkowski]

Dave,

I understand you thoughts on the nylocks.
They are and were a pain in the ass.

The washer in your photo looks like the right size.

Nothing wrong with a lock washer and flat nut it gets the job done.

I see the bolt is a self taping tapper. Nothing wrong with that 
either. It gets the job done also. It may help get the job done
better as you can get the nut started easier.

Roger AI4NI



-----Original Message-----
From: quartz55 <quartz55 at hughes.net>
To: R-390 <R-390 at mailman.qth.net>
Sent: Mon, Nov 25, 2013 4:25 pm
Subject: [R-390] Front Panel Screws


Well, I've had someone tell me that the screws for the harness used a large flat 
and nylock.  I looked at mine, and granted both the rxs I have are missing a lot 
of the hardware there.  However, looking closely at the aluminum clamp, it 
appears that the one I have access to may have just had a spring lock washer and 
small pattern nut from looking at the scaring on the clamp, the spring lock just 
fits in the scarred area.  A large flat would crush the bent section at the end 
and a 5/16 o.d. #6 flat just fits beneath the curved part.  I'm not sure I've 
ever seen a nylock in an R390A, but I come late to them, I never worked on them 
except the ones I bought later in life.  I'm sure the repair guys just put 
something on them to hold it together and fill the hole if they had to work in 
that area.  Not that I'm adverse to nylocks but they make working on them a bit 
harder, you have to deal with both ends and the way we use these rxs I doubt if 
a nylock would be of much use.

Feel like I'm getting a bit anal here.  So I think I'll just assume that a split 
spring lock and small pattern 6-32 nut will suffice and no external tooth on the 
panel front because both rxs I have don't look scarred up from an external tooth 
washer in the 3 harness mounting screw holes.  Anyhow here's a pic of the clamp 
with a spring lock, 5/16 o.d. #6 flat and the small pattern nut. 
http://i251.photobucket.com/albums/gg287/DogTi/R390A/frontpanelharnessscrews_zpsb6ec2d38.jpg

I've got about another 7 or 8 people that want sets at this point, so if anyone 
wants nuts, flats and split spring washers, let me know.  It'll take probably 
the rest of the week to get the stuff together.  I'm just sticking with the 8 #8 
screws, the 8 #6 screws, 3 spring locks and nuts for now.  It was suggested I 
make a kit with a whole bunch of items, but that's getting out of control for 
me.  It's not like I need to do this, but since I needed some hardware anyhow I 
thought I'd help others out.  I'm sure a lot of those #8 and 6 front panel 
screws are pretty chewed up or lost at this point, like mine.

I'll add up the price of everything and let you know, but last time it really 
came to nearly $5, but if I can knock down the hardware price......

Dave
N3DT
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