Hisashi,
It almost sounds like you *could* have "RF in the shack"....
several causes for that as you may know. Google.
Charlie, N0TT
On Thu, 10 Apr 2014 12:54:51 -0700 (PDT) Hisashi T Fujinaka
<htodd@twofifty.com> writes:
> On Thu, 10 Apr 2014, Jim Brown wrote:
>
> > On 4/10/2014 10:40 AM, Hisashi T Fujinaka wrote:
> >> The crowbar circuit trips on RF a lot. I've seen this on several
> >> Astrons I own. Lots of ferrite on the leads helps.
> >
> > What frequencies? When you say "lots of ferrites," did you wind
> turns
> > through them, or just clamp them on?
>
> I've had issues on 40 and 15, and I think on 30. Definitely on 40,
> though with a couple of different radios.
>
> The power line I clamped on several (my supply of ferrite is just
> Radio
> Shack and those aren't big enough) but I did use several turns on
> the
> power supply leads near the power supply at first and then near the
> radio as well when I had other issues.
>
> --
> Hisashi T Fujinaka - htodd@twofifty.com
> BSEE(6/86) + BSChem(3/95) + BAEnglish(8/95) + MSCS(8/03) + $2.50 =
> latte
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