[Drake] Re: #12 lamps (Fuse lamp in TR-4)

[Barry L. Ornitz]

Chris Codella, W2PA, asked:

> Do any of you know a source for the #12 fuse lamp in the
> TR-4 (the one in the antenna line)?

According to the Chicago Miniature Lamp Incorporated's "Design
Engineers Databook," the #12 lamp, which they call the CM12 is
a G-3�, Miniature 2-pin base lamp rated at 6.3 volts and 0.15
amps.

If you unsolder and remove the base of an ordinary #47 lamp
and solder the fine wires to two short pieces of #18 gauge
wire, you should have a suitable replacement.  If you want
something a little more substantial, use a short piece of a
standard PC board header to solder the fine wires to.  The
leads are 0.20 inches apart and are 40 mils in diameter.  The
#47 (CM47) is one of the most commonly available miniature
bulbs around.  It is rated at 6.3 volts and 0.15 amps, the
same as the #12.

        73,  Dr. Barry L. Ornitz     WA4VZQ     ornitz@tricon.net