Found on a 1965 Radio Electronics, this circuit fires a signal xenon lamp applied to the SCR from an external trigger. The pulse transformer generates high voltage for flash triggering.
This low noise circuit was obtained from a 1980s US RF publication. Transistors used are uncommon...
The scratch is the noise of scratching or scrape that occurs when scratched vinyl records are...
We found this circuit in the magazine Eletcronics Now of July 1994. The power supply is according to...