Eric, I believe the scale is removable in the 78/x74 as it is in 77 series.
Another alternative is to out-source the scale to RAMMETERS.com. I know
they've re-done old 78/x74 meter scales using the original ETO negatives.
KH6P did much of the research on this.
I recently had them make a new multimeter scale for my 77Dx as the red scale
was fading after years of indirect UV exposure. Anyone know why red is so
sensitive to UV fading? Same with family photos that sit in the living room
for many years of sunlight exposure. Anyway, cost was about $45 per scale.
A bit pricey, but it's the "real deal." If the amp is in nice cosmetic
condition, it may be worth it. I believe they could easily use the old ETO
scales but with modified numbers for the meter doubler. To get started,
they need all the ETO numbers from the corners of the scale -- and that
usually means disassembly of the lens from the meter. Contact is:
Ram Meter Inc.
----- Original Message -----
From: "Eric Rosenberg" <email@example.com>
Sent: Friday, February 25, 2011 3:28 PM
Subject: Re: [Amps] Alpha 78 Labels/upgrades
> Mark --
> Is it possible to open up the meter and remove the scale? Is the scale an
> integral pasrt of the meter movement? If so, is there a solvent available
> that can remove the "printing"?
> In the meantime, can you email me the scale you drew, or a link to the s/w
> you used?
> Eric W3DQ
> Washington, DC
> I I also have the meter doubler circuit on my 78 and found a program on
> web that will let you draw a perfect meter scale. I seriously considered
> doing it until I realized that just pasting the paper I printed it on over
> the existing scale would not work too well. The light that illuminates
> meter would shine through both scales making the result impossible to
> Take care,
> Amps mailing list
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