Quote: "VCO" is an acronym for Voltage Controlled Oscillator.

Well, yeah I gathered that, after more reading. I see that people
have used them in music synthesizer modules.

I'm sorry for being a bit elementary and maybe long winded here, I'm
still trying to learn as much as I can while I am doing and reading,
etc.

The VCO in the transceiver project in the book used some sort of motor
control and shaft encoding.

I did a google type search for HF DDS Generator using WebFerret. Came
up with over 175 results. Seems people are using 16F chips and AD98xx
chips.

Well, anyhow thanks for all your replies.

Greg
Seattle, WA