Subject: [Amps] 3CX3000A7 input impedance
A friend of mine is building up a 3CX3000A7 amp and asked me what the input
impedance is. Seems that I used 50 ohms when I built mine but I'm not sure.
The Eimac tech sheet says a 3x3 running in AB2 cathode driven will have an
input impedance of 50 ohms. Can anyone verify that for me?
Thanks,
Bob W6TR
I can verify that, Bob. I am running a 3X3 on 160 meters here, and I
designed the input Pi-Net for 50 ohms in and out, with a Q of about 3-5, or
so. The VSWR is 1:1 across the band.
((((73))))
Phil, K5PC
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