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Author Topic: TS-530S Low power operation?  (Read 757 times)
KB0FSD
Member

Posts: 16




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« on: January 07, 2001, 03:01:31 PM »

I have a Kenwood TS-530S that I operate always at max output. Is there a way to tune this rig for low power operation. Operators manual has you tune for full output. I would like to run at less than 50 watts.
To minimize wear and tear on my finals. I just can't
figure out how to do this.
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K6LO
Member

Posts: 226




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« Reply #1 on: January 07, 2001, 05:23:56 PM »

Simple. Dip the plate control, and adjust the loading control for apx 120 ma IP.  That should give you around 100 watts input to the plate, which at 50% efficiency (typical for a tube final radio) close to 50 watts output.  Do be sure to adjust the plate cap for a dip, so that it is resonant.  You could also simply reduce the mic gain for SSB or carrier for CW.  But reducing the loading is more accurate for SSB.  As an alternate, you could simply apply the proper negative DC voltage to the ALC input of the radio.  There is an application note on the web showing how to do this with any 6146 Kenwood.  It requires only a 9 volt battery and a 100k pot.  Of course, this partiular method assumes you are not driving an amplifier, and have the ALC line dedicated.

Regards,

Luke - K6LO
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