Need to replace or repair 10" speaker [Archive]

pchilson

07-21-2008, 02:11 PM

Hi,
Don't know where else to ask this.
Picked up this old Admiral 7c65 radio. Guy was using it in his garage.
My question to the forum is what do I do about this speaker...?
The guy was playing the radio with that speaker like it is. What with the output transformer mounted on the frame is this something I can use a permanet magnet speaker with and move the OT? I don't know how to proceed with this, the schematic doesn't really help me figure this out.
Whats my best course of action? What would you do?
Also, when I measure across the leads with my DMM the reading is "0.5"???
This with the radio on or off... I don't know what ohm this is. Who can help me with this?

Thanks

Schematic (http://www.nostalgiaair.org/PagesByModel/186/M0000186.pdf)

Current condition of the speaker...
http://i280.photobucket.com/albums/kk163/pchilson/Admiral/speaker_cone.jpg

OT mounted on the speaker frame...
http://i280.photobucket.com/albums/kk163/pchilson/Admiral/output_tranny.jpg

Code stamps on the speaker...
http://i280.photobucket.com/albums/kk163/pchilson/Admiral/speaker_code.jpg

jrfrond

07-21-2008, 03:51 PM

The seamed cone, paper surround, solder eyelets, and the way it fell apart (!) all show that it is a Jensen. You could replace it with a new Jensen P10R. Jensen also makes OEM recone kits for these, so you could go that route as well if you don't want to transfer the OT to another frame.

You are reading across the OT secondary with your DMM. You need to disconnect one of the secondary leads to get a correct DC resistance reading.

pchilson

07-22-2008, 02:46 AM

Thanks for the reply John,

So I take it this is a permanent magnet speaker and any permanent magnet of the correct ohm would work with the OT transfered?

jrfrond

07-22-2008, 03:41 AM

Yes, and even the transformer is not critical.

pchilson

07-22-2008, 03:57 AM

Yes, and even the transformer is not critical.

I'm sorry, I don't get your meaning about the OT???

jrfrond

07-22-2008, 06:33 AM

Well, you CAN use just about any 10" PM speaker that will fit. And you CAN use any OT floating around that is similar in size and ratings, if the original is not viable.

pchilson

07-22-2008, 01:29 PM

As in if I need to replace it. Ok, thanks John.

orbanatorfunk

08-27-2008, 10:16 AM

Hi,
Don't know where else to ask this.
Picked up this old Admiral 7c65 radio. Guy was using it in his garage.
My question to the forum is what do I do about this speaker...?
The guy was playing the radio with that speaker like it is. What with the output transformer mounted on the frame is this something I can use a permanet magnet speaker with and move the OT? I don't know how to proceed with this, the schematic doesn't really help me figure this out.
Whats my best course of action? What would you do?
Also, when I measure across the leads with my DMM the reading is "0.5"???
This with the radio on or off... I don't know what ohm this is. Who can help me with this?

Thanks

Schematic (http://www.nostalgiaair.org/PagesByModel/186/M0000186.pdf)

Current condition of the speaker...
http://i280.photobucket.com/albums/kk163/pchilson/Admiral/speaker_cone.jpg

OT mounted on the speaker frame...
http://i280.photobucket.com/albums/kk163/pchilson/Admiral/output_tranny.jpg

Code stamps on the speaker...
http://i280.photobucket.com/albums/kk163/pchilson/Admiral/speaker_code.jpg

www.orbanaudiospeakerrepair.com
Specializing in vintage speaker repair/reconing. best in the business. Fair prices quick turn around time and free shipping located in los angeles