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@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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> Amps@contesting.com
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>
>
>
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