--- On Tue, 4/12/11, Michael Almeter <w4mja@yahoo.com> wrote:
From: Michael Almeter <w4mja@yahoo.com>
Subject: Re: [Amps] Amp Supply Power Dropping
To: "Carl" <km1h@jeremy.mv.com>
Date: Tuesday, April 12, 2011, 3:00 PM
Thats about it. I tried reproducing the problem with no luck last night. I
thought it might be a faulty center pin of the RF output SO-239, but thats the
best guess I've got. The center pin of the SO-239 appears to be loose.
73,
Mike
W4MJA
--- On Tue, 4/12/11, Carl <km1h@jeremy.mv.com> wrote:
From: Carl <km1h@jeremy.mv.com>
Subject: Re: [Amps] Amp Supply Power Dropping
To: "Michael Almeter" <w4mja@yahoo.com>
Cc: Amps@contesting.com
Date: Tuesday, April 12, 2011, 2:49 PM
So what else did you eliminate before we keep spinning wheels?
Carl
KM1H
----- Original Message ----- From: "Michael Almeter" <w4mja@yahoo.com>
To: "Carl" <km1h@jeremy.mv.com>
Cc: <Amps@contesting.com>
Sent: Tuesday, April 12, 2011 2:39
PM
Subject: Re: [Amps] Amp Supply Power Dropping
Suspected that one... I experienced the same with two different power meters. I
thought it might be a loose wire in the antenna tuner - nope.
73,
Mike
W4MJA
--- On Tue, 4/12/11, Carl <km1h@jeremy.mv.com> wrote:
From: Carl <km1h@jeremy.mv.com>
Subject: Re: [Amps] Amp Supply Power Dropping
To: "Michael Almeter" <w4mja@yahoo.com>, Amps@contesting.com
Date: Tuesday, April 12, 2011, 2:35 PM
Sounds like an intermittent power meter would be the initial suspect. Birds are
especially prone to
this.
Carl
KM1H
----- Original Message ----- From: "Michael Almeter" <w4mja@yahoo.com>
To: <Amps@contesting.com>
Sent: Monday, April 11, 2011 6:00 PM
Subject: [Amps] Amp Supply Power Dropping
Hello All, I've got an interesting problem with my Amp Supply LK-500NTC. While
operating a contest this weekend, I watched as periodically, the power would
drop down to about 100 watts output (with about 50 watts going into the amp
from the transmitter). I'd give the amp a second, and the power would go right
back up to about 500 watts. I initially thought this was overheating, so I
turned the internal fan on full blast. This didn't seem to make that much of a
difference. Every once in a while, the amplifier would not have any output.
Between 50
and 90 watts going in, but nothing coming out. This makes me think there's a
connection issue in the amp, but I haven't been able to find one - yet. While
there was low output or no output, the plate and grid current on the amplifier
remained within normal ranges. Any one got any ideas?
73,
Mike
W4MJAdiv>
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