Omni C S-Meter Lamp Mod

From the Ten-Tec Reflector June 1, 2002

I just dug through my Omni folder and found a Ten-Tec modification for the Omni meter lamp.

The modification sheet came with two parts, a 1892 bayonet base bulb (14.4 volt - 0.12 amp) and a 10 ohm, 1/2 watt resistor.

Here are the modification steps:

  1. Remove CM47 Bulb.
  2. Cut out resistor on base of bulb.
  3. Install new bulb (1892).
  4. Install 10 ohm resistor as shown. (Diagram shows the new resistor connecting from the red wire on the Mic/Blanker pot down to the lug on the lamp.)

In the circuitry, the lamp and the resistor wind up being in series and across the 12 volt line. This is where I used the 33 ohm resistor instead of the 10 ohm that Ten-Tec supplied, and I've never lost a lamp since!

I'm sending a copy of this to the Ten-Tec reflector in hopes that it helps someone.

73, Mike N4NT

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