Hi Lee,
What does it do on the other bands...?
It almost sounds as if the amplifier is being loaded strictly by paralleled
fixed padder caps --- like the lead to the variable cap has somehow been
broken.
Does this amp use padders on 40...? Some do --- here in my HB 2x813 amp,
the only band that does NOT use any is 20-meters.
Very curious indeed...!
~73~ Eddy VE3CUI - VE3XZ
**********************************************
> ----- Original Message -----
> From: "Lee Buller" <k0wa@swbell.net>
> To: <amps@contesting.com>
> Sent: Thursday, November 20, 2008 10:10 AM
> Subject: [Amps] Strange Loading Issue
>
>
> >
> >
> > My friend has a AL80A...generic amplifier. In fact, I sold it to him. He
> was having some issues loading it so I went over to his house and took a
> look. This amp worked great for me for about 5 years or so.
> >
> > We were going into a 40 meter antenna which gave an SWR reading of 1.1
to
> 1. Very low. Seemed to me to be OK.....
> >
> > The amp would go to 400 mills and 160-170 mills on the grid with about
73
> watts of drive. Around 600 watts. I could dip the plate and see the peak
on
> the watt meter. Seems reasonable to me. But, the load control on the amp
had
> no effect on the grid current or the plate current. I could almost put the
> load control anywhere and it would not affect the meters what so ever.
Now,
> this had never happened to me before when I owned the amp. The load
control
> was .... working normally to my thinking and I could adjust the load of
the
> amp and bring down the grid current to around 120 mills. Kind of has be
> baffled as to why it is doing this. I do not think it is normal.
> >
> > Does this "august" group have any words of wisdom?
> >
> > Lee - K0WA
> >
> >
> > In our day and age it seems that Common Sense is in short supply. If
you
> don't have any Common Sense - get some Common Sense and use it. If you
> can't find any Common Sense, ask for help from somebody who has some
Common
> Sense. Is Common Sense divine?
> > _______________________________________________
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> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
>
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