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G6Tanuki · 8th Apr 2015, 9:14 am

It's essentially a voltmeter (a 200uA microammeter with a series resistor) wired between the screen-grid and cathode of the second IF amp; there's a diode [one half of the noise-limiter double-diode) wired in series with the meter because under some settings of the IF gain control it would otherwise cause reverse current-flow through the meter.

8th Apr 2015, 9:14 am	#2
G6Tanuki Dekatron Join Date: Apr 2012 Location: Wiltshire, UK. Posts: 14,007	Re: Eddystone 888A Field Strength Meter It's essentially a voltmeter (a 200uA microammeter with a series resistor) wired between the screen-grid and cathode of the second IF amp; there's a diode [one half of the noise-limiter double-diode) wired in series with the meter because under some settings of the IF gain control it would otherwise cause reverse current-flow through the meter.