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

[Tom Frobase]

Yes Jim that is the plan, to look as much like an analog meter as I can.
Working on the software I realized that I can make the arc a little longer
and larger since the mechanical movement for the meter pivot is not a
limitation anymore. tom, N3LLL

On Fri, Dec 16, 2016 at 3:26 PM, Jim Pruitt <jpruitt67 at gmail.com> wrote:

> Hello Tom.
> I wonder if you are going to program the meter so it looks like an analog
> meter, at least in the display?
>
> Thank you.
>
> Jim Pruitt
>
>
> On Fri, Dec 16, 2016 at 1:22 PM, Tom Frobase <tfrobase at gmail.com> wrote:
>
>> 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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