On Tue, 2 Feb 2010 15:55:10 -0500, Gary Schafer wrote:
>You should be able to get an idea of the output impedance of the amp at the
>second harmonic frequency by checking with an impedance meter at the output,
>like with an MFJ. You may need to place a resistor from the plate to ground
>of the tube to simulate the tube load. Do all this of course after the amp
>has been tuned up on the operate frequency and then shut down.
Yes, I thought about doing that, but didn't get as far as simulating the tube.
You
can't just shut down the amp though -- you've got to leave it up with the
antenna
relay pulled in. All in all, a lot more work than I have time for right now.
But I
think you're right on target about measuring it. Any suggesting as to the
resistance to use to simulate the tube?
73,
Jim K9YC
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