[R-390] Re: Refinishing meters
Gregory W. Moore
[email protected]
Tue, 29 Apr 2003 09:30:44 -0400
To ALL,
I could generate some artwork for the meter faces, but what I would need
is a photo of an actual glowing R390 meter face
with a machinist's scale in the photo... I want to do the artwork large,
then have it reduced in a process camera. I need the machinist's scale
in the pix to establish actual size...I would appreciate being able to
see the mounting screw holes for the meter face, etc.....I have an R392
from Fair with a replacement meter, so I can use that as the benchmark
for the "new" meter, in case
screw holes have changes, etc, etc.
If you can do this, I will do a layout of the artwork, and get it shot
in the process camera to reduce it.. Hey, I KNOW that
this is kinda behind the times, but we didn't use CAD/CAM or computer
rendering when I was designing dials for aircraft instrumentation..we
did the original anywhere from 4:1 to 10:1 using pc artwork layout tape
for the indicia, cut to exact size
with my trusty X-Acto, and a photo typesetter of the old strip type, so
one cut the lettering out and pasted it up...
The bigger the better, as scale errors were reduced in the reduction
process.
Now, on printing the meter face, I recommend using either Randolph
epoxy Fed-Std 595 color 37038 (flat black) yes krylon flat black would
work, or flat black baking laquer from Brownells, and to screen the
indicia, a 600x600 mesh stainless screen using Ulano Wet Direct
Emulsion.... the printing, I can find no better than Wornow Cat-L-Ink
flat white (17875) unless you want a different color..
color. I am not really set up here for this type of precision screen
printing, since I am now retired from aerospace engineering,
but I could do the artwork, if asked nicely enough --hi--
I will suppose that someone on this list has the ability to do the whole
layout by computer graphics, so if they do, you have my greatful thanks,
but if you want it done "the old way" I will do the artwork, get it
reduced with the emulsion on the right side to
expose the screen printing plate, and then ya are on your own...these
are just suggestions....
73 es tnx de Greg
David P. Goncalves wrote:
>Question: Does the joint between the circular case and square face have a
>recessed metal ring with 4 notches in it? A couple of meters I recieved
>yeterday have that, might need a special wrench to unscrew it, if it does
>indeed screw in. It could also be a friction/compression ring; if so I
>guess drilling into the notches would help. Just a guess.
>
>Also: I was reading in the 'Pearls' about the solution of the meter face
>reproduction problem (using a laser printer). I'd like to make a couple of
>Fair Radio replacement meters into useable R390 meters, but to do so, I
>need either a scan or high quality photograph of the two dial faces. Does
>anybody have these?
>
>
>David P. Goncalves
>
>
>
>>Has anyone experience with meters like the one shown at
>>
>>http://members.aol.com/n4buq/r390a
>>
>>I want to have it powder coated, but I'm not sure putting it in a 400-deg.
>>oven is a good idea. Does it come apart? It appears to have a hard-rubber
>>(neoprene?) gasket imbedded in the back. Does this come out easily? If so,
>>does it expose the method of disassembly?
>>
>>I noticed that when I removed the electrical connections on the back, the
>>meter movement became loose inside the housing. Apparently this isn't a
>>sealed meter and it should come apart but I havent seen any way to get it
>>apart.
>>
>>
>
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>
>
>
--
"All that is necessary for the triumph of evil is that good men do nothing."
--Edmund Burke
Greg Moore NNN0BVN PA
U.S. Navy-Marine Corps Military Affiliate Radio System (MARS)
Official Pennsylvania Area Website:
http://pages.prodigy.net/nnn0fbk/mars.htm
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Navy-Marine Corps MARS: Proudly Serving Those Who Serve."
E-Mail (MARS) [email protected]
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