12-15-2009, 05:22 PM
Hi
If your 39-31 is in good, restored, working condition, you can make a small modification to it to play your MP3 player through it.
Scroll down to the bottom of this page to see the circuit.
If it is a non-working radio...then you are in a bit of a dilemma, as the 39-31 speaker requires a source of high voltage to operate. This is an electrodynamic speaker, using a field coil instead of a permanent magnet. The field coil is tied into the radio's power supply and serves as a filter choke. When the radio is in operation, high voltage runs through the field coil, energizing it. This produces the magnetic field necessary to make the speaker work.
In short, you can't just connect your Ipod to a 39-31 speaker.
If your 39-31 is in good, restored, working condition, you can make a small modification to it to play your MP3 player through it.
Scroll down to the bottom of this page to see the circuit.
If it is a non-working radio...then you are in a bit of a dilemma, as the 39-31 speaker requires a source of high voltage to operate. This is an electrodynamic speaker, using a field coil instead of a permanent magnet. The field coil is tied into the radio's power supply and serves as a filter choke. When the radio is in operation, high voltage runs through the field coil, energizing it. This produces the magnetic field necessary to make the speaker work.
In short, you can't just connect your Ipod to a 39-31 speaker.
--
Ron Ramirez
Ferdinand IN
