I have suspected for a number of years that the plate meter in my L4 was reading a bit low. Today I had the amp opened up to make a minor repair and I decided to check. Using a variable power supply, a series resistor, and a DMM in series, I've determined that the L4 meter does indeed read a bit low. As an example, when I adjust the power to give me 400ma on the DMM, the drake plate meter reads ~360ma. The schematic shows the meter to be a 1.0 amp movement and does not appear to have any external shunt resistors. BTW, the meter was disconnected form the amplifier circuitry when I took the current readings.
There obviously does not seem to be any way to tweak this but I thought I would ask. This slightly lower reading is not a problem for me but I thought I'd check with the Drake brain trust before buttoning the the amp. TNX & 73, Stew K3ND
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