[R-390] R-390A meter substitutes, repair, or sales.

[Tom Frobase]

I have a back burner project I have been working on.  I have multiple 390's
lacking meters, I thought about a solution for a good while and decided to
go digital, although it will emulate an analog meter.  Attached is a
picture of my prototype.

http://www.kitparts.com/r-390/meter.jpg

One of my fellow ham's worked with me to produce a meter housing to fit a
64 X 128 pixel OLED display.  What you see here is the raw printed plastic,
no paint.  It is the same physical size as the original meter.  The unit
will be powered off of power borrowed from the pilot lamp.  Since the a/d
converter will be used the resistance will be identical to the original.
The audio meter will do the ac - cd conversion internally.  Thought I might
add a digital DB field under the meter.  Lot's of available options but
first I just want the holes filled ... 73, tom, N3LLL

On Fri, Dec 16, 2016 at 12:24 AM, Chris Kepus <ckepus at comcast.net> wrote:

> I am rebuilding a R-390A and am in the process of gathering parts while my
> back recovers from lumbar fusions and other restorative surgical
> procedures.
> I have another 90 days before I'll be maneuvering this R-390A onto a repair
> bench.
>
>
>
> This R-390A is missing it's meters so I am looking for either the real
> deals
> or suitable substitutes.  If anyone has spare working meters that they
> would
> like to convert to wampum, please contact me directly.
>
>
>
> Given the relatively scarcity of these rascals, I have found at least one
> candidate for  a substitute meter. It has the same dimensions as the
> original meters and when flipped over, it appears to have the same circular
> "nut" with four equally spaced square notches and the "nut" is recessed
> into
> the Bakelite surrounding the circular meter case.
>
>
>
> I have never attempted to take one of these meters apart so would someone
> who has performed meter surgery please enlighten me if it possible to open
> these meters up.  The circular "nut" may not be a nut at all.. But if it
> is,
> it looks like it requires a unique spanner wrench.or ?
>
>
>
> Thanks in advance for any and all input, suggestions, sad tales of meter
> destruction, or success stories.
>
>
>
> 73 / Chris / W7JPG
>
>
>
>
>
>
>
>
>
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