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Energy saving MDCL

Kelly A said:
That was great advice David. If it were heavier, a Powerside would make a good boat anchor.
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I thought long about just connecting 110 to the output...

(I had that happen in Perú where they confused the AC with the audio line to the roof of the building and put 110 into the Optimod. I had the time of my life trying to replace precision resistors and caps with stuff from the local radio repair wholesaler. I had multiple resistors in parallel and made do as parts took weeks to get there. We were supposed to sign on the next day, and I was the program consultant... but we made it!)
 
kevtronics said:
When 1600 WWRL turned off their Kahn Power-Side in 2012, I noticed a definite increase in selective fading. That's when one of the two AM sidebands fades out, which causes a large amount of distortion on normal receivers using an envelope detector -- sometimes bad enough to make the audio completely unintelligible. But when there is effectively only one sideband to begin with, such as when using Power-Side, this effect is greatly reduced, so the audio remains clear and intelligible during signal fades.

A synchronous detector is immune to selective fading, and what maddens me is that every HD Radio includes one, but none of them seem to use it for analog AM reception, so you get that nasty distortion during fades. Since it's all done by DSP, a few lines of code would've fixed this!
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This. Even for local reception a synchronous detector can do wonders.

I wonder if the good high end NXP chips are using it?
 
Kelly A said:
That's easily the most Powerside boxes Leonard probably ever sold. I just remember taking one apart and recognized hand built immediately.
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Kelly, I might have not been too clear, but I am not even sure if these units were made by Kahn. For some reason, I am thinking that Art Brown, one of the techs at A Site, made some units at the station and that is what we ran.

I wish I had taken photos of a lot of that stuff at Greenville, if for nothing else, to refresh my memory.
 
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