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Dentron 160-10L No ALC
Posted: Wed Jan 17, 2007 3:45 pm
by emory
Hve a question,
I am running a TS940S/AT the rig was designed to put out 150 watt's.
I hve bought a Dentron 160-10L amplifier running 4-572B's.
Now my question is
Running the cable from the rig to the relay of the amp.
"The Dentron Amp Has no ALC so how can I safely run the amp without Frying my rig?"
Tnx
RF Amplifier ALC
Posted: Wed Jan 17, 2007 10:03 pm
by WA9WVX
Emory,
The true purpose of ALC Automatic Level Control is not really to increase talk power, but to prevent RF signal splatter interference. When the signal is fed to the final RF amplifier stage and it's over driven, the result is adjacent-frequency splatter. This would be the familiar "flat-topping" of signal peaks seen on a station monitor's oscilloscope when the SSB transmitter is misadjusted.
The ALC DC Voltage is derived from the RF Amplifier's internal power supply and sampled from the RF output section which is sent back to the transceiver via a small coaxial cable generally using a RCA plug. If perhaps this is not available on your older Dentron Amplifier, just reduce the RF Output to 80 to 100 Watts on your Kenwood transceiver.
Increasing the station's RF power output from 100 Watts to 400~500 Watts will provide a +6 dB increase on the receiving end or 1 S-Unit.
Dan
Dentron 160-10L
Posted: Mon Apr 09, 2007 3:55 pm
by kc0yef
How do you have your Dentron set up?
Are you using it on SSB or continuious?
I just picked one up last week and have it wired for 220 now I need to run the lines
Also th Manual I have seems very small I did also find the schematics
ALC
Posted: Tue Jul 31, 2007 5:19 pm
by kc0yef
Reply Emory??
Ghostwriter thanks for that information
I think Emory is a Ghost Must have blown up his Dentron
Re: Dentron 160-10L No ALC
Posted: Tue Jun 25, 2019 3:19 pm
by kc0yef
12 years Emory?
Re: Dentron 160-10L No ALC
Posted: Sun Jun 30, 2019 12:25 pm
by ku3x
Lots of amps now a days do not provide ALC. The Alpha 8410 does not. Elecraft K3's don't ever provide an ALC jack on the back of their radios.
You have to turn the power down on the radio to your desired power level. Start at 65 watts to tune the amp. Once tuned, bump up the power a tad until you get close to your desired output. Retune the amp and add a little more drive if needed. Don't try to hit 1200 watts on the mark. Once you get close to 1000 watts you are doing good. Nobody on this planet will see the difference, on their receive radio, between 1000 watts and 1200 watts.
Barry