Catwalker

Well, this is embarrassing! My first post of 2020 and it's April 24th!
Oops. Well, time for an intermediate project or two, before I carry on with the limited space antenna and figuring out just how well it's working.











This is a schematic of a Heathkit HD1416 Code Practice Oscillator.  I bought the actual kit around 1978, probably still have it somewhere, but packed away, and I needed a CPO in order to do some testing. So I decided to build one. I still have the complete manual (which is downloadable off the web - not from me - you can Google it.) This is the second clone I've built of this. I built one for a local ham (now long deceased) for him to give to a young fellow he was encouraging to become a ham.

The circuit is an astable multivibrator consisting of Q1 and Q2, the output being fed into a transistor audio amp, Q3.

じゃまた