Bruce, your 1300 ohm figure is right on the money.
The three Ameritron amplifiers you mention run similar plate currents so the
plate load Z will also be similar. The loaded Q might vary a bit from unit
to unit but this causes no problems in the real world.
73,
Gerald K5GW
In a message dated 11/8/2007 7:00:22 P.M. Central Standard Time,
n9bx@mchsi.com writes:
>From What I read when you have two tubes in Parallel, Like two 3-500
the RL is 1/2 of what it would normally be if one tube was used. Since
the good people at Ameritron have shown us the schematics for the Al-84,
(2-3550), al-1200 and al-1500. I wonder why all of the same components
are used in both AMPS? Like Tank circuit and Capacitance Values. Does
this not effect the operating Q of the final Tank circuit?
I only ask this in hopes that someone could shed some light on my quest
to build a 2 x 8877 Amp.
If I had 3600 Volts on the Plates of Two tubes, and figuring 1.82 x 1.5
amps that should give me a RL of 1318. Or 1300. Should I design my
Tank circuit for that value? In everything I read this is Correct.
Please give me your thoughts.
73 Bruce N9BX
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