Thanks for the encouragement Ron:
I just received a new 10 metre element and ALC is fine. On 17 metres I get
ALC to a dummy load but not into my antenna (still unable to set ALC on 15
metres into the dummy load - Well that's not quite correct. If I go fully
clockwise the ALC light flashes on peaks but the speaker rattles and for all
intents the rig almost jumps off the shelf!). If I run a poor (2:1) SWR I
can get ALC on 15 metres but not on 17?? So if I have an impedance of 25
ohms 17 metres won't work BUT if my impedance is 100 ohms -- it sets without
a problem.
I called Tentec and they suggested I try a different coax to the
antenna/dummy load. I did and that wasn't the problem.
I think you may have hit the nail on the head BUT why won't it work on 15m
and why does it work in this manner? I thought I'd re-tune the LLD/ALC
board using the method outlined in the manual BUT none of the pots are
labelled in the pictorial view or on the component side of the board. So now
I need to find C4, R12, R14 and R21. (Part numbers on the pictorials would
make life a lot easier.)
73 de Rick
-----Original Message-----
From: Ron Kerlin <kerlin@ligtel.com>
To: Rick Williams <ve7asr@islandnet.com>; tentec@contesting.com
<tentec@contesting.com>
To: <tentec@contesting.com>
Date: Monday, October 26, 1998 12:12 PST
Subject: Re: [TenTec] Scout Problems
>Rick...remember that the alc light is a measure of the *input* power rather
>than the output power. If the swr of your antenna is on the low impedance
>side, you can have a breaker or fuse blow before the light illuminates.
>Likewise, I have been able to load 50 watts before the light illuminates.
>Sounds like your situation may be normal. (In the Argosy manual, this
>phenomena is discussed in fairly good detail.)
>
>Maybe the noise in the headphones is from the display microprocessor. That
>can be reduced or eliminated by using high impedance headphones. (600 ohms
>work well and are a standard for many type of commercial phones.) Using
low
>impedance, high-fi type phones puts the audio amplifier and a poor spot in
>its signal to noise slope. If this is the case with your Scout, it is not
a
>defect, but rather an engineering characteristic of the radio. (If it is
>the display, you will probably find that the noise is worse when the last
>figure is a "`1")
>
>73 de Ron/kb9lsh
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