In article .com,
wrote:
I"m trying to build a clock that uses the WWVB signal to keep its own
time. I have everything built and working except the Antenna portion.
I have a 1.1mH ferrite rod Antenna.
I know tuning it would require a capacitor that I calculated to be
7700pF. The problem I am having is tuning it. I am not sure how to
test it to make sure it is working correctly. I have tried
broadcasting a 60kHz signal from a function generator and viewing it on
an O-scope and Spectrum Analyzer, but I"m seeing nothing. I"m looking
for any suggestions to prove I have this tuned correctly.

Feed the parallel LC circuit from the function generator with
a 100k ohm resistor and look at the voltage across the LC with a
scope. you should see an obvious peak when you sweep the frequency.

You can get pretty large mica compression trimmers (?-500 pF), still.
So you could tune with one of those in parallel with some fixed
caps.

Mark Zenier
Googleproofaddress(account:mzenier provider:eskimo domain:com)