300% Positive Peaks AM Modulation

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W1AEX:
It's amazing what you can find while browsing YouTube on a rainy day. Tom K1JJ made reference to a post on YouTube by "MotorMouth" who apparently is legendary on 11 meters. I viewed a couple of his related posts and found two that caught my attention. In the last three minutes of the video below, the guy shows some scope patterns that look pretty impressive. He does seem to be able to reach 300% positive peaks without smacking the baseline.

http://www.youtube.com/watch?v=26cB7BeLmbE

Another related video, with fairly poor focus at times, shows more of the same kind of asymmetry in the audio. At about 2 minutes into the video, the camera shows the device they are using, called "The Mauldulator".

http://www.youtube.com/watch?v=C2oe7q59SwQ

Anyone care to guess what is inside "The Mauldulator"? Perhaps a version of the HUZ zener diode limiter? Or a version of the QIX keep alive circuit? At any rate, to their credit, looks like they are having a good time with the toys they play with.

w3jn:
Whatever they're trying to do, anything much over 80-90% positive is gonna create copious distortion in yer typical diode detector.

Jim, W5JO:
Yea, but just think of the "SWANG".

W3RSW:
Check the reflection in the meter windows.
Motormouth's buddy hissself.  Really proud to work the "Maul."
A little photoshopping and we'd get a visual.
http://www.youtube.com/watch?v=AHSSC9eyfRI&NR=1

ka3zlr:
Quote from: w3jn on April 18, 2010, 01:21:55 PM

Whatever they're trying to do, anything much over 80-90% positive is gonna create copious distortion in yer typical diode detector.


I agree 100%.

73

Jack

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