You have to calculate the plate load impedance of the tube(s) that you plan
to use. plate voltage/(1.8 * plate amps). You then take the PLI and in the
ARRL Handbook they list what C1,L1,C2 you need for each band.
Another alternative is to use a computer program to calculate the
capacitances and inductance.
Bob W6TR
----- Original Message -----
From: "KBØNLY" <kb0nly@mchsi.com>
To: <amps@contesting.com>
Sent: Friday, February 20, 2009 4:13 AM
Subject: [Amps] Question for All Amp Builders...
Got a question for everyone...
When designing an amp how do you determine the value of the tune and load
capacitor? I have been looking at a lot of designs online for HF and 6M,
i'm currently working on building a 6M myself from a YU1AW design.
Just seems to me there has to be some solid logic behind the values that
these guys put down when they design the schematic for it.
73,
Scott KBØNLY
www.kb0nly.net
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