Operational Amplifier Oddity - Vocoder
Sponsored by JLCPCB ($2 for 10 Boards): https://jlcpcb.com
ETI Vocoder constructional project reproduced with kind permission from Wimborne Publishing Ltd. http://www.epemag.com
The use of different op amp types (bipolar, JFET input) in the vocoder project has caught me out :)