Need source for correct dash speaker

[PbFut]

I cleaned up my original radio and got it working. No parts needed. Just some good cleaning. My original 10 ohm factory dash speaker has an open circuit so it will not work. Searching, results returns modern speakers with way to low of resistance that will damage the radio's power transistors over time. Is there a source for a correct speaker or possibly a repair service?

[71CHEVYSHORTBED402]

Originally Posted by PbFut

I cleaned up my original radio and got it working. No parts needed. Just some good cleaning. My original 10 ohm factory dash speaker has an open circuit so it will not work. Searching, results returns modern speakers with way to low of resistance that will damage the radio's power transistors over time. Is there a source for a correct speaker or possibly a repair service?

Fits like a glove. Nice classic sound. http://www.turnswitch.com/speakers.htm

[LockDoc]

Originally Posted by 71CHEVYSHORTBED402

Fits like a glove. Nice classic sound. http://www.turnswitch.com/speakers.htm

Here is their new web site:

https://www.smelectrotech.com/

I had 2 original speakers re-coned by Jackson Speaker Service, Jackson, Michigan. they did a nice job on them. At that time they didn't have a web site or FB account but they may have now. I just typed the name into Google and called them from the info on there.

LockDoc

[PbFut]

Perfect thank you
As usual. 5 mins after posting I located a repair shop about an hour from me. But his cost to repair and shipping would be more than the replacement unit on the site you both recommended. Plus I won't have to wait 2 weeks while he repairs.
Great referral.
Thanks again.

[LockDoc]

Originally Posted by PbFut

Perfect thank you
As usual. 5 mins after posting I located a repair shop about an hour from me. But his cost to repair and shipping would be more than the replacement unit on the site you both recommended. Plus I won't have to wait 2 weeks while he repairs.
Great referral.
Thanks again.

Post back and let us know how you get along with it.
.

[Rust_never_sleeps]

I strung together two cheap 4 Ohm speakers in series for an 8 Ohm load

[PbFut]

I was tempted to do the same. Bach in the day 8 ohms would probably work for years. 50 years later, I feel the load may over tax a component that at one time not been an issue. Given it seems not too difficult to source a 10 ohm speaker, I'll go the conservative route.

[Rust_never_sleeps]

Originally Posted by PbFut

I was tempted to do the same. Bach in the day 8 ohms would probably work for years. 50 years later, I feel the load may over tax a component that at one time not been an issue. Given it seems not too difficult to source a 10 ohm speaker, I'll go the conservative route.

Fair point. Those reman options from SM aren't expensive either

[PbFut]

Follow up on Speaker received from https://www.smelectrotech.com/
Took about a week. Sent USPS. About 98 buck shipped.
I failed to take a picture before I placed the mount on the speaker.
Stated made in USA
Speaker is as close as its going to get with modern parts available. The new speaker has a very small magnet and at first look concerning to me. The vendor states the magnet thou smaller is actually much stronger than original using more modern material. There is a plastic block to attach to the speaker magnet so that the original mounting hardware can be used. The Speaker works well and included clear instructions and informative. I would not have been concerned about polarity had I not read the instructions. On a mono set up, polarity should not normally be an issue but in this case there appears to be a need. The speaker cone jumps upon power up of the radio. The cone should jump out not pull back when the radio is turn one. How many of you knew that little tid bit?
The lead is the original from original speaker.
One more point. The felt is included on face of speaker. No chasing down extra needed items on this one. Very much worth the price.

[dmjlambert]

Interesting. Is there a reason behind the cone should jump out not pull back when the radio is turned on? Should it jump towards the felt, is that the idea?

It looks like their online selector picks an oval speaker instead of special rectangle when you choose 1969. Other years give the speaker shape you show, special rectangle.

[ray_mcavoy]

I put one of those speakers from https://www.smelectrotech.com (formerly turnswitch.com) in my 74 Nova about 10 years ago and it still sounds great. Back then they supplied a little wooden block (instead of plastic) to fit over the smaller magnet and make it secure in the factory mounting bracket.

The amplifier circuit in many of the original Delco radios (typically the ones that use a DS501 or DS503 output transistor) place a small DC bias (about 1.3 to 1.5V) across the speaker. That's what causes the speaker cone to move up and create that pop/click sound when the radio is switched on. If the polarity were reversed I think it could have the potential (depending on the speaker design) to pull the cone down close enough to the magnet that it might momentarily bottom out and distort the sound.

[1970cstblazer]

I have their speakers in my Blazer using a modified van AM/FM with rear speaker fader option, with second speaker mounted in the center console. The sound is very good for a totally vintage radio, and the fit was good in the original speaker grille.