[Amps] AL-1500 Circuit Diagram

[Jerry Muller]

If the heater isn't driven, the heater will sputter itself to the cathode
and eventually it will end up with a short between the heater and the
cathode. You need to put a filament choke in an amplifier using an 8877 and
NOT ground either side of the filament.

73, Jerry K0TV

----- Original Message ----- 
From: "R.Measures" <r at somis.org>
To: "AMPS" <amps at contesting.com>
Sent: Tuesday, March 01, 2005 11:48 AM
Subject: [Amps] AL-1500 Circuit Diagram


> In the AL-1500 diagram, the cathode is connected to one side of the
> heater,  C7 couples RF from the tuned-input to the cathode ,and C8
> couples RF from the tuned-input to the other side of the heater.  Can
> someone please explain why the heater is driven with RF?
>
> Richard L. Measures, AG6K, 805.386.3734.  www.somis.org
>
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps