[Premium-Rx] Collins 651S-1 Display Upgrade Instructions

[Gary Geissinger]

Gentlemen,

I have a Collins 651S-1 with the original (and now bad) vacuum display
digits.

I have procured a full set of the upgrade LED replacement displays.

Given the different voltage and current requirements between the original
and new digits, I suspect that this upgrade may require more than just
swapping the displays.

Does anyone out there have a copy of the instructions on performing the
upgrade?  My 651S-1 Manual on CD-ROM isn't very clear on this.

Of course another alternative would be to find a source of the original
vacuum displays.  I have tried and not found any.

After I get the frequency display viewable, I'll tackle the sensitivity
problem (20 dB less than my other 651S-1).

Thanks,

Gary WA0SPM  


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