View single post by Itsu
 Posted: Aug 19th, 2014 02:10 PM
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Itsu

 

Joined: Dec 6th, 2013
Location: Netherlands
Posts: 11
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EVPfan,

trying to keep up with you, but i am still at this first opamp circuit using a TL084 instead, powered from 2 12V batteries (so +12v and -12V).
Nice hissing sound from the earplug / MOSFET amplifier, but nothing else.
There is 15V directly across the diode 1n34 (25V total across the 2 resistors (1M each) and the diode).

At least the radio stations are gone (also the pilot/control like signal), so there could be no mistake there.

Short video here: https://www.youtube.com/watch?v=KBxut4Kts5Y&feature=youtu.be

Regards Itsu

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