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Re: [Amps] SB-221 Problem - Slow on the uptake

To: Rex Lint <rex@lint.mv.com>
Subject: Re: [Amps] SB-221 Problem - Slow on the uptake
From: James Colville <jimw7ry@gmail.com>
Date: Thu, 18 Feb 2010 20:22:15 -0800
List-post: <amps@contesting.com">mailto:amps@contesting.com>
What is the input SWR?  What does the exciter show it is?

Jim W7RY



On Thu, Feb 18, 2010 at 7:04 PM, Rex Lint <rex@lint.mv.com> wrote:

>  Does it with ALL exciters.  Guess the input network is something we
> haven't looked at though.
>
>
>
> Thanks,
>
>
>
>       -Rex-
>
>
>
>      K1HI
>
>        Rex Lint
>
>        Merrimack, NH
>
>
>
> *From:* James Colville [mailto:jimw7ry@gmail.com]
> *Sent:* Thursday, February 18, 2010 8:15 PM
> *To:* Rex Lint
> *Cc:* Amps; Jerry Muller; Lee Hill
> *Subject:* Re: [Amps] SB-221 Problem - Slow on the uptake
>
>
>
> Sounds like your exciter has a problem...Or it has a problem with the load
> (amplifier).  Why not simply key the amplifier BEFORE you put the rig into
> transmit mode?
>
>
>
>
>
> 73
>
> Jim W7RY
>
>
>
>
>
> On Thu, Feb 18, 2010 at 9:01 AM, Rex Lint <rex@lint.mv.com> wrote:
>
> Hi Wizards,
>
> After I replaced the TR relay, the amp seems to take a 20 milliseconds to
> develop full output.  That tends to clip off part of the first CW
> character.
>
>
> We jumpered the bias ON, then switched the AMP KEY relay and the output is
> not up to full output right away, so we determined it's not the bias.  We
> disconnected the ALC circuit at the joint with the output from the input
> circuits, and still no joy.  Other recent mods:  rebuilt the bias circuit
> after parasitic incident, including replacing zener.
>
> Any ideas as to what might cause this?
>
>      -Rex-
>
>     K1HI
>       Rex Lint
>       Merrimack, NH
>
>
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