c24 Technical reflexions about constructing coils
Coils (under work):
where L (ÁH) = inductance. d= diameter in cm, l =length in cm, N = turns.
*) Note the link should have magnetical
coupling to the coil, and should be placed at the bottom end of
The right picture shows a coil with similar socket as for Tech TE15 dip-meter.
Once popular slug-tuned coil, but the rather long screw makes it very little practical to use!
American pre-war ready-wound coil, bought at an auction in Oslo last autumn.
Disc-coils, the latter from a HE 1 type
Wehrmacht receiver. (LA6NCA).
Tunable iron-powder toroid coil
Frame type coil
German coils for HF and VHF
RF chokes (mostly German)
German RFC's and audio chokes and mike-transformers.
Ceramic coils used in German transmitters
German IF bandpassfilters
An unknown tunable coil (LA6NCA).
Components from German equipment on page f21 and f22
Capacitors (the pictures will be moved to another page later).
Differential capacitors (2x 60pF and 2x 5-25pF), se page ...