[GreenKeys] 28 cabinet lamps

[w9ddd at tapr.org]

Over the years there have been several modifications.

Originally the copy lights were fluorescent and the margin indicator was a 60 volt lamp with  a 700 ohm resistor.

I see a wiring diagram that indicates there were also versions with 60 volt lamps all around and therefore 3 700 ohm resistors.

Later we have the transformer with 6 volt (#82) copy lamps but still a 60 volt margin lamp.

Was there ever a modification for a different voltage margin lamp?  I ask because I have a cabinet with a #82 in that spot.  I haven't fired that cabinet up yet, but I'm expecting that #82 to be toast. 

There are two more lamps on the left side of the cabinet which usually used for some kind of alert or status.  These both have #82 lamps in them.  I've not researched to see where those get their power from.  

The trade number 82 lamp is a G6 bulb with a BA15d base.  The 60 volt lamp is a S6 bulb with the same BA15d base.  I have not been able find the trade number for this lamp.  The 82s are all clearly marked, nothing more than USA marked on the 60 volt lamps. I wish I still had my circa 1980 GE miniature lamp catalog.  

( the G6 or S6 describe size and shape of the glass envelope of the lamp)
John, W9DDD