[Amps] AL-1500 Plate Meter Circuit

[Dave Hachadorian]

Page 9 of the instructions says, "The final grid current should 
be around 50 mA and the plate current below 1000 mA."

By the way, the power output meter in the AL-1500 is not a real 
wattmeter, and can be quite inaccurate.


Dave Hachadorian, K6LL
Yuma, AZ



-----Original Message----- 
From: Jim W7RY
Sent: Thursday, December 23, 2010 2:07 PM
To: Jim W7RY ; AMPS
Subject: Re: [Amps] AL-1500 Plate Meter Circuit

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 at inbox.com>
Sent: Thursday, December 23, 2010 1:04 PM
To: "AMPS" <amps at 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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