speaker repair

Only 1930s music comes outa my Cord radio. The secret: When I had my radio box rebuilt, I had the shop put in an input to the amplifier section at the same point that the antenna wires enter. A small toggle switches between inputs, and the new inputs terminate in two RCA jacks on the outside of the box. I plug in a cord with a 2.5mm plug at the other end, plug it into my iPod, and my "1936" playlist comes out of the speaker above the windshield on my Westchester. Fun!

Thank you for the info J, were there any ideas for making the power and antenna connection fittings?

I still had that issue handy, I remember reading where the magnet coil could be disconnected with a new speaker. I will try to use my old speaker if it will still work.

Only I will only be listening to president Roosevelt and Orson Wells, "War Of The Worlds" over the vintage radio set anyway,in my imagination of a 1937 broadcast <!-- s:wink: --><img src="{SMILIES_PATH}/icon_wink.gif" alt="" title="Wink" /><!-- s:wink: --> .

Author Daniel Schultz and Bill Tyndall really know there stuff, that is a great article on radio repair! Now I have to find part 2!

The schematic clearly shows the speaker junction as three wires and the shielded ground at the box.

It also shows the tone pot should be soldered to one side of the voice coil and not power. The picture of the speaker must be in error, can someone check a spare speaker for correct tone pot wiring junction, it must be on a blue dot, not a yellow,but I don't have an extra speaker to see.

Now I have to see why there are only two leads exiting my speaker harness, thanks for the issue reply, I would still be looking for the issue.

edit:
I removed the lower harness plug and revealed a yellow power wire and two darker wires that would be the voice coil. The braided metal shroud would only allow three wires through it, the outside is the fourth wire ground.

The lower harness plug looks like a taillight light bulb housing if someone is missing this piece

There is a complete wiring diagram for the Cord radios on pages 14-15 of issue 2003-5 of the ACD Newsletter. The article is called "Your ACD radio".

The article also recommends that you replace the old speaker with a new PM one. Better sound, less current draw, only two wires. (No authenticity issues --- the speaker is completely concealed.)

You asked earlier about the knob at the center. It's a tone control pot, and is wired between one of the voice coil terminals and ground.

I rechecked the speaker lead and it is really quite nice for as old as it is. At the speaker end there are four wires to the speaker with intact plugs. At the radio end the pins were probably left (torn off) in the old receiver as the rusted and broken radio was removed, but the harness socket at the radio end is still there as it was soldered to the braided shield under the fabric insulation harness cover. Only the pins are missing that can be made from salvaged tubes.

So that is good news and some of the color is in the wire, yellow and blue? The interesting thing is there are two wires exiting the harness and one soldered to the outside braiding. What happened to the fourth wire? Does it end somewhere inside the harness, it is as it came from the factory as far as I can tell.

So the harness has four wires at the speaker and two wires exiting at the radio end of the harness. The radio has a three pin socket. Are all three used?

I hate to bore everyone with this post, but this radio hookup is maddening, I would rather be installing a Boosted Mobile 700 watt Quadraphonic multiple bass speaker stereo 8 track cassette Cd MP3 player. There would be fewer problems.

That?s great idea, and I was just looking at some old vacuum tubes and it never occurred to me the pins would fit perfectly! Does my posted speaker picture look like it is wired correctly? Is the center knob secondary volume or tone control?

The speaker has four wires but the radio only has a three-pin socket. I have a schematic around here somewhere but I can?t find it when I need it.

Would the two voice coil wires go to the two small terminals of the radio socket and one of the coil magnet wires go to the larger hole in the radio socket and the other wire grounded? I really need a small diagram of the speaker to box wiring.

I think I am missing a clamp of some sort (mentioned in manual) on the speaker, the instructions on the radio manual aren?t very clear and there is no diagram of the speaker plug on the radio.

How do you make the power and antenna lead connectors to radio box, is there another trick replacement, I was going to try to make them out of tubing but I would rather use a proper replacement. Half of the metal fuse housing is still intact on the head to ammeter lead so I kind of know what they should look like.

In the diagram from the radio instruction manual there is no view of the speaker input. I am missing the power lead and antenna lead and need clues on making replacements. The tape antenna is still under the floorboards and in good condition.

We have just always taken an old radio tube, stole the pins, and made our own connectors. They are just so hard to find in good shape, and old radio tubes are a dime a dozen. Good luck.

I removed my speaker and the paper cone seems fine except a few small tears that can be repaired with some velum and glue.

The problem is the wire (green wire just setting on first terminal, not soldered) to the tone potentiometer was broken off the terminal. It looks like it should be soldered to the first terminal, the yellow dot one, and there is what looks like a wire break off the fourth terminal, could this be an addional wire to ground?

I have the wire harness still intact to the speaker but I am unsure which of the four wires go what speaker wires since there is no color left on the fabric insulation, I could trace the wire continuity but the plug is missing off the end of the speaker wire to the radio, under the dash, it must have been a four wire connector, does anyone have this plug or harness?

Once I have a working speaker and wire harness to the radio box I can see if I can get the radio working. Anybody have an extra four-prong lower speaker harness plug?