[Amps] W7EME 144 mcs. 8877 problems

[R.Measures]

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