[Kenwood] TS930 1.7Mhz power limiter?

[Clif Holland]

What is the current draw when putting out 8w vs 100w? That will tell if 
something is turning down the power or there is a problem. If there is a 
problem I would replace L1 on the "H" board.

Clif Holland KA5IPF
www.avvid.com




----- Original Message ----- 
From: "John E. Cleeve" <g3jvc at jcleeve.idps.co.uk>
To: <kenwood at mailman.qth.net>
Sent: Tuesday, October 27, 2009 6:17 PM
Subject: [Kenwood] TS930 1.7Mhz power limiter?


> Gentlemen,
>
> I am currently working on a TS930SAT serial 400XXXX. The transmitter power
> output into a Bird 50 ohm load is 100 watts plus across 3.5 -30 MHz, but 
> on
> 1.7 MHz the power output is down to around 8 watts. However, if you
> disconnect the ATU output lead from the "MAT" connector on the "switch 
> unit
> H" board assembly which is the one connected to the antenna output SO239
> connector on the rear panel, then terminate the lead in 50 ohms and 
> measure
> the power into that load again, it measures 100 watts.
>
>
>
> I am assuming that this TS930SAT was imported into the UK when the maximum
> transmitted power allowed in the UK was ten watts, and that may be the
> reason the power output of this rig is reduced at 1.7 MHz. However, from 
> the
> TS930 system diagram two connectors/cables are shown going from the 
> "switch
> unit H"  to the Signal board, but there appears to be no reference to such 
> a
> power preset variation in the Kenwood service manual, and I would be
> grateful if anyone can offer an explanation, or a link to the appropriate
> Kenwood reference. Sincerely, John G3JVC.
>
>
>
>
>
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