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Re: [TenTec] AL-811 amp integration with Omni V

To: geraldj@storm.weather.net,Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] AL-811 amp integration with Omni V
From: John Huffman <hjohnc@adelphia.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Mon, 06 Aug 2007 18:52:40 -0400
List-post: <mailto:tentec@contesting.com>
I used to have a Tuner-Tuner (fixed 50 ohm noise bridge) but kept 
blowing the fuse by transmitting through it.

Now have an MFJ-212 Matchmaker.  Same concept but with auto-bypass and a 
momentary ON button.

These devices are great for my setup.  I use the Matchmaker to tune my 
tuner for flat SWR.  No signal on the air, no stress to the rig, no QRM.

My amp is an Ameritron ALS-600 Solid State No-Tune amp.  So, the tuner 
that is adjusted with the Matchmaker is ready for either the exciter or 
the amp.

Even the second or two of transmission using an auto-tuner bugs me.  The 
frequency may sound clear, but I may be QRMing someone inside my skip zone.

This system has been fast and easy for me.  YMMV.

73 de K1ESE

Dr. Gerald N. Johnson wrote:
> On Mon, 2007-08-06 at 15:11 -0500, Stuart Rohre wrote:
>> All,
>> Always tune up a rig and linear and tuner into a dummy load before applying 
>> an antenna.  Then, you should have less range of adjustment to fine tune the 
>> tuner to the antenna.
> Only if the antenna is near resonance. Otherwise the tuner should be
> pretuned with an antenna analyzer or noise bridge or tuner tuner (fixed
> Z noise bridge. The rig and linear used with that tuner should be tuned
> into a dummy load and all that tuning can be facilitated by keeping a
> tuning chart with good logging dials on the adjustable components.
> I find peaking receive through the tuner speeds adjustments when I've
> neglected to look at my tuning chart.
>> And, if possible, use an antenna analyzer to make sure the tuner settings 
>> are either correct for the intended antenna, (separately with the linear 
>> disconnected), or tune the antenna using the antenna analyzer as the source.
>> That minimizes the on air time of the linear while tuning up.  Actually, the 
>> goal is to NOT tune up the linear on the air.
> For sure, but when the only tuning instrument is a SWR bridge that runs
> at full transmitter power, tuning on the air will be done.
>> 73,
>> Stuart
>> K5KVH 
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