Glad to hear that someone's using a C21 - I had one when they were new, enjoyed it hugely!
Use to take it out to my Titan II ICBM site and hook it up to the big discone antenna in off hours.
Do you have the matching single paddle keyer ?
Speaking of the matching single paddle keyer, do you know where I can get one? Someone offered me theirs last year and I thought about it but didn't get it. I've read mixed opinions on it. I'd like to try a single paddle keyer though but I'm not sure that's the one to get. Have you used one? If so, what did you think?