[Heathkit] Question on SB401

Sun, 15 Feb 2004 17:33:07 -0500

Russ,

Sounds like an internal short in the tube. Sometimes heat can cause
defective elements to sag. Either that, or its a parasitic oscillation.
You could recheck the neutralization, but I wouldn't trust that tube.

			Bob WB2VUF

Russ Hines wrote:
> 
> Either tubes or ALC circuit.  Since it was intermittent, I'd also look at
> the tubes.
> 
> I hope he doesn't learn the hard way that an SB-401 can make a great power
> oscillator.
> 
> For a minute. ;-)
> 
> 73,
> Russ
> WB8ZCC
> 
> ----- Original Message -----
> From: "Glen Zook" <[email protected]>
> To: <[email protected]>; <[email protected]>
> Sent: Thursday, February 12, 2004 12:39 AM
> Subject: Re: [Heathkit] Question on SB401
> 
> > What version of the 6146 are you using?  6146, 6146A,
> > 6146B, combination?
> >
> > Glen, K9STH
> >
> >
> > --- [email protected] wrote:
> >
> > All was fine for about 2 minutes then same problems.
> > All of a sudden all the problems stopped and rig went
> > back to normal.
> >
> > =====
> > Glen, K9STH
> >
> > Web sites
> >
> > http://home.comcast.net/~k9sth
> > http://home.comcast.net/~zcomco
> >
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