On Feb 6, 2005, at 1:23 PM, Jeremy Alexander wrote:
Aloha to all:
My QRO is having fits. I have an 8877 on 144 Mcs, the classic w6po
design.
It is showing some arcing at the control grid ring to chassis ground.
This
should be a low-inductance coupling shouldn't it? Instead of a
continuous
finger stock, it has four, three fingered pieces at each 90 degrees
around
the grid ring. Arcing is occurring between the fingers and grid ring.
Were
the fingers attach to the chassis, things look clean. I assume this
"less
than great" (my opinion) configuration is to allow more airflow
through the
chimney aperture? I think I can hear faint arcing sounds inside the
cabinet
causing these small pitting in the grid ring.
Jeremy -- What is the size of your HV bypass cap?
.
Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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