22-10-2016, 04:42 PM
Had a ticklish afternoon with the Ranger, its an E54/3 incidentally, trying to find long wave.
Aerial coils and wave change switch seem OK, local oscillator stops I recon when in the long wave position but the oscillator coils have continuity. The medium and long wave oscillator coils are on top of the chassis on an open tag strip arrangement with small adjustable core slugs.
Careful dismantling revealed that they are pairs of coils in pairs of round half cup ferrite pots.
The ferrites on the long wave coils are cracked, top one in 2 pieces, bottom one in 4. These are only about 16mm od and the coils are wave wound with very thin cotton covered wire. There is rusting and the cores were stuck in the coils.
I managed to work the cores out, and get the bits of ferrite off the coils, after a few heart stopping moments when things got stuck, without breaking any wires off.
I have superglued the bits back together, tomorrow after going to the Gnosall meeting, I will see if it works.
Aerial coils and wave change switch seem OK, local oscillator stops I recon when in the long wave position but the oscillator coils have continuity. The medium and long wave oscillator coils are on top of the chassis on an open tag strip arrangement with small adjustable core slugs.
Careful dismantling revealed that they are pairs of coils in pairs of round half cup ferrite pots.
The ferrites on the long wave coils are cracked, top one in 2 pieces, bottom one in 4. These are only about 16mm od and the coils are wave wound with very thin cotton covered wire. There is rusting and the cores were stuck in the coils.
I managed to work the cores out, and get the bits of ferrite off the coils, after a few heart stopping moments when things got stuck, without breaking any wires off.
I have superglued the bits back together, tomorrow after going to the Gnosall meeting, I will see if it works.
Boater Sam.
