Need White's Classic I and Classic III TX coil inductance

[w5cdt]

Does anyone know where I can obtain the TX coil inductances for the Whites Classic I and Whites Classic III search coils?

Thanks!
-CT

[homefire]

Here are some of there coils listed.

http://www.geotech1.com/cgi-bin/page...oils/index.dat

[kt315]

attach

[w5cdt]

Thanks for the coil data

When building coils I've learned that the discrimination circuit (phase shifter for the sync demod) assumes a certain coil TX frequency. While there is some latitude in this due to the ability to adjust the discriminator setting if you get too far off the intended TX frequency your discrimination settings will change.