Hi Jim,
Yep, we tried AM and SSB both.
The filter caps are brand new, and I also changed the bleeder/equalizer
resistors, as well as the other carbon comps on the control board, since
they were drifted out of tolerance.
I'm working on the plate choke bypass caps, bias line bypass, etc.
If I wasn't so nervous about it I'd hook up the fancy HV probe I
bought for my DSO and actually take some measurements. Just color me
chicken... :-)
Thanks es 73,
Jim N7CXI
On 10/17/2013 9:35 PM, Jim Brown wrote:
On 10/17/2013 7:43 PM, Jim Barber wrote:
160M AM, (100W carrier, 400W PEP) into two different antennas and all
said the hum was very loud. Move to 75M or higher and it
Are you running AM on the other bands too? If it's not there (or not
strong) on SSB, I'd suspect filter cap(s) in the HV string. I don't
work AM, but on CW, I've had exactly that symptom, with exactly that cause.
73, Jim K9YC
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