Good one Lou, I completely forgot about that thing.
Carl
KM1H
----- Original Message -----
From: <gudguyham@aol.com>
To: <km1h@jeremy.mv.com>; <amps@contesting.com>
Sent: Thursday, November 20, 2008 4:09 PM
Subject: Re: [Amps] Strange Loading Issue
> The Al-80A is notorious for the small little nylon connector that
> connects the load cap to the vernier control to split and the cap dos
> not advance when you turn the laod knob.? Bet that s your problem.?
> Seen it several times in my repairs on that amp.? Lou W1QJ
>
>
> -----Original Message-----
> From: Carl <km1h@jeremy.mv.com>
> To: Lee Buller <k0wa@swbell.net>; amps@contesting.com
> Sent: Thu, 20 Nov 2008 12:19 pm
> Subject: Re: [Amps] Strange Loading Issue
>
>
>
> Id start the next step using a dummy load and investigate the
> bandswitch
> wiring. There is a fixed 170 pf C used on 40M but with 800pf variable
> I
> cant see that being the problem. More likely the load cap switch wafer
> has zapped or a crystalized solder joint.
>
> Carl
> KM1H
>
> ----- 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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