[Amps] Fw: Re: Amp Supply Power Dropping

[Michael Almeter]

--- On Tue, 4/12/11, Michael Almeter <w4mja at yahoo.com> wrote:

From: Michael Almeter <w4mja at yahoo.com>
Subject: Re: [Amps] Amp Supply Power Dropping
To: "Carl" <km1h at 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 at jeremy.mv.com> wrote:

From: Carl <km1h at jeremy.mv.com>
Subject: Re: [Amps] Amp Supply Power Dropping
To: "Michael Almeter" <w4mja at yahoo.com>
Cc: Amps at 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 at yahoo.com>
To: "Carl" <km1h at jeremy.mv.com>
Cc: <Amps at 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 at jeremy.mv.com> wrote:

From: Carl <km1h at jeremy.mv.com>
Subject: Re: [Amps] Amp Supply Power Dropping
To: "Michael Almeter" <w4mja at yahoo.com>, Amps at 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 at yahoo.com>
To: <Amps at 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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