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I'm after a service manual / circuit diagram for a Marconi RC782 TX.
I've got one here that's a PA and I want to get it running on 2m. I've got it doing about 45W on 2m, but there's a lot of second harmonic coming out (10W), and me playing about isn't doing much to kill it off, so I need to look at a circuit to try to work it all out. Can anyone help? Sam |
#2
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![]() I've got one here that's a PA and I want to get it running on 2m. I've got it doing about 45W on 2m, but there's a lot of second harmonic coming out (10W), and me playing about isn't doing much to kill it off, so I need to look at a circuit to try to work it all out. Can anyone help? Sam If it's a push pull stage, you have one transistor not doing it's job. Should have 30-40 dB of second harmonic suppression just due to symmetry. W4ZCB |
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