This is a really great reference video for either making or modifying any model 309 Heathkit probe and you can download the schematics for versions A, B or C ( PK-3) as well as the models 337 B,C, model 338 B and 342 but you may need some extra electronic parts to make those.
This is a really great reference video for either making or modifying any model 309 Heathkit probe and you can download
the schematics for versions A, B or C ( PK-3) as well as the models 337 B,C, model 338 B and 342 but you may need
some extra electronic parts to make those.
thanks for posting this interesting video
Would like to know what it can do and in use on video.
Thank you for this build video. Why remove the diode? Speaking of the diode, you know of a modern equivalent?
Cheers,
Adriel
..so, how do we know it works? A demo would be nice.
Are you kidding? It took him almost a full minute just to tear the paper away from the aluminum tube! A proper demo ain't likely on this channel.