Hi,
The B- of the power supply for the Drake L-4B and L-7 goes to pin 6 of the
Cinch connector. Inside the amp, the B- is floated above ground by a one ohm
resistor. The one ohm resistor that floats B- above ground is said to be for
the purpose of plate current metering. I do not quite understand how this
resistor is needed for plate current meter accuracy. Could someone please tell
me how that works?
I have an L-7 and a homebrew amp that uses a similar power supply. However, in
the homebrew amp the B- goes directly to ground. I'm trying to understand the
difference in the configurations.
Thanks and 73,
Bill NZ5N
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