In this video we restore a HP 200AB audio oscillator from 1952.
Virtual museum:
http://www.hp.com/hpinfo/abouthp/histnfacts/museum/earlyinstruments/0004/index.html
Support us on Patreon;
https://www.patreon.com/theradioshop
Contact Information;
http://gokarters.com/smf/index.php?topic=2549.0
Discuss this on my website;
www.gokarters.com/smf