Looking a little closer at the schematic, R3 and R4 are grid meter
resistors. The grid current is very low about 50 ma for 1500 watts out.
Thanks
73
Jim W7RY
--------------------------------------------------
From: "Jim W7RY" <w7ry@inbox.com>
Sent: Thursday, December 23, 2010 1:04 PM
To: "AMPS" <amps@contesting.com>
Subject: [Amps] AL-1500 Plate Meter Circuit
> Merry Christmas!
> I'm working on a AL-1500. I noticed that the is only one 1.5 Ohm resistor
> in the plate metering circuit. The schematic calls for two 1.5 Ohm
> resistors (R3 and R4).
>
> The plate current seems just a bit high. With 1500 watts out, plate
> current is about 975 ma @ 2900 volts. I really believe the amp is a bit
> more efficient than this.
>
> Ideas?
> Thanks
> 73
> Jim W7RY
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