[Collins] 32S-1 Oscillations & Other Troubles

[Darrel Nichols]

> [Original Message]
> From: Ian McLean <i_mclean at yahoo.com>
> To: <n0dbx at mindspring.com>
> Date: 6/16/2004 1:25:49 AM
> Subject: Re: [Collins] 32S-1 Oscillations & Other Troubles
>
> Are you running 6146A's or 6146B's???
> Make sure you are running A's not B's!
> You will have problems if the B's are in your unit.
>
> Something to look out for.
>
> 73, Ian, VK3JQ
>
> --- "Dr. Gerald N. Johnson, electrical engineer"
> <geraldj at isunet.net> wrote:
> > Do you have RF rated 6146? I've run into some from
> > the Electronic Tube
> > Company as military parts that wouldn't work at all
> > at RF.
> > 
> > How is the neutralization of the driver, the RF
> > feedback, and the PA on
> > 20M? Does peak output match plate current dip? When
> > peak output and dip
> > match that's a hint of good neutralization.
> > 
> > Have you neutralized the three adjustments on 10M?
> > 
> > 73, Jerry, K0CQ, Technical Advisor to the CRA
> > -- 
I am using B's.  Old stock RCA.   I'll look through the
shelves.   I had used B's in later S-3 years ago without
difficulties.   And the neut WAS a little hard to get on
the nose...

So I take it you guys haven't run into the feedthru cap
problem mentioned in the bulletin?

N0DBX