The simplest, scariest "spud amp" I have yet seen

mhardy6647
mhardy6647 Posts: 32,926
edited October 2020 in Electronics
Serves me right for looking at old copies of Radio-TV Experimenter on worldradiohistory.com :)

I mean, with an isolation transformer, it wouldn't be scary any more (at least) :)

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source: https://worldradiohistory.com/Archive-Radio-TV-Experimenter/Radio-TV-Experimenter-1959-7-559.pdf

As to the "X" in the schematic... quoth the text:
"Shock that might result from handling metal pick -up arm on a record player can be prevented by inserting a .05 mfd 200 volt paper capacitor at (X) in Fig. 5 and mounting the phono jack on a Bakelite disc. However, most modern pick -up arms are plastic. The only chance for a shock from touching chassis is when you're standing on a damp concrete floor or touching some grounded object. "

mmmm-hmmm...

:|

Now I wanna build one. Those cartridges aren't all that different than a line-level signal (although the loading might be a bit different).

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