"Brenda Ann Dyer" wrote in message ...
"Mark Keith" wrote in message
om...
"Brian" wrote in message
hlink.net...
I'm guessing 10-365pf would cover the majority of the broadcast band.


Brian

I bet it takes double that. He will need a "dual" 365pf cap to cover
the whole band with one cap, and no switching.

Why would this be the case, when a standard AM radio covers the entire
broadcast band with a single 10-365pf variable??

Q of the circuit? Not really sure. I don't build AM radios. But in
judging from my loops, I'd be surprised to see one tune the whole band
with a single 365pf cap. I'm fairly sure neither of mine would. If I
dumped one of the gangs of my dual 365 cap on my 16 inch loop, it
WOULD NOT cover the whole BC band. When you build a loop, you build it
around the cap. IE: adjust the number of turns to give the desired
range with the cap at hand. If you can get a loop to cover the whole
band with a single gang cap, more power to you. But I'd have to see it
to believe it. It ain't happening here. MK