c24 Technical reflexions about constructing coils
Coils (under work):
Calculating coils:
where L (µH) = inductance. d= diameter in cm, l =length in cm, N
= turns.
![]() Torotor |
![]() Prahn 5013 |
![]() Prahn 5014 |
![]() |
*) Note the link should have magnetical
coupling to the coil, and should be placed at the bottom end of
the coil.
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).
Crosswound coil
Toroid-coil
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).
see
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 ...
2005.02.04