[1000mp] Quadra Amp

[John Passaneau]

----- Original Message ----- 
From: "Mark Tetrault" <mdtetrault at highstream.net>
To: "All about Yaesu 1000mp" <1000mp at mailman.qth.net>
Sent: Monday, July 19, 2004 9:52 AM
Subject: Re: [1000mp] Quadra Amp


On Mon, 19 Jul 2004 12:37:54 +0000, you scribbled:

>
>>
>>Ideas from the group?
>
>Mark -
>My idea is to do a controlled experiment and not rely on guessing to get to
>the answer.  I would start by connecting the amp to a dummy load and
>transmitting.  If all is well then you know it has to do with radiated rf
>getting into something.  If you still have the problem with the dummy load,
>then the problem is in the shack.  Please start here and then let us know.
>
>Rick  K2XT

Great thought Rick

Connected directly to an MFJ Dummy load, the quadra on 3.964 tunes fiine
and I can scream, whistle, talk, do hand stands, and the SWR never
moves. The amp takes it fine. Hook it back up to the G5RV and before I
get a 1/2 a sentence spoken it's back to protection mode >3-1 SWR.
Sometimes I cannot say one word. Other times it takes two sentences
before it drops out to protection mode.

So it woul appear to be either the antennaor the lead. The lead is new
coax and is NOT shorted, pinched or looped. Goes across the shack, out a
small hole in the window frame, off the roof to the ground, over the
ground to the twin lead connection.

Mark
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 Hi All:

Here is a thought. What kind of coax are you using. For that power level it
should be RG-8 size, not RG-8x or RG-58. The latter 2 cables are not rated
to carry that kind of power with a non perfect SWR or even with a perfect
SWR.

John Passaneau W3JXP
State College, Pa
w3jxp at adelphia.net