Here's some useful information. Though I work with radios a lot, I don't have many of the formulas memorized, etc. We're building a transmitter in my communications class, and I need to find the right size coil to use at 2MC.....and, of course, the appropriate capacitance. I'm going to select the capacitance and then wind the coil around that (figuratively, not literally). ...But anyway, I needed this information, and thought that it'd be useful to everyone else.

T.

http://info.ee.surrey.ac.uk/Workshop/advice/coils/air_coils.html

Hi Thomas:
That's a good page.

I remember back in my beginning active Ham radio days of the late 60s when I built my 1st transmitter and later when I wound the coils for a 2-meter set... that the ARRL Ham manual ( the one you have there) gives mostly all you need to know to wind the appropriate coils .. ie wire gauges and freq/winding formulas etc.

That's the ARRL manual 1946 edition starting on page 414 where the freq/inductance/capacitance nomograph is.

Try this nice link too.:
http://www.crystalradio.net/professorcoyle/professorcoylecyl.shtml

Duh..........I should have checked the ARRL book. That book comes in handy for all sorts of stuff.

Thanks Peter,

T.