I have found that restoring fragile ripped old cones is effective and easy with some very low cost (39 cents to 49 cents or so) strong and beautiful replacement cones sold through Electronix.com
I usually cut away all the old cone from the outer edge down to a small 1/2 dollar-sized circle remaining near the center. I then take the new cone and cut a hole slightly larger than the 1/2 dollar area. I glue the new cone over the old section in the center and then just glue the outer rim of the new cone to the frame rim... Beautiful, fast easy and sounds beautiful too.

Last night though I was trying to do this to a speaker whose outside diameter is 5-1/4 inches.
But..I had only two replacement cone sizes that were close in size, a 4-1/2" which was way too small and a 6-1/8" which was way too big.
So I thought I could just cut a slit in it and overlap the two edges like a "tighter paper funnel"... to reduce the outer diameter. Well...that was correct but still it won't work because the funnel just gets that much deeper too and that was just too steep of an angle to fit.

Well the cones are so cheap I decided to get brave and experiment.
The solution was to cut the 6-1/8" replacement cone into 6 sections or pieces like a pizza.
Then the outer edges of each "slice" could then be easily glued to fit on the outer rim... and the pointed end can be glued over my 1/2 dollar center part easily as well.
Then all I needed to do was overlap each slice as I glued them down and then just run a bead of glue on each overlap joint.
Well it works!! ...and sounds terrific too.
Take a look at the result:
http://www.pbpix.com/pizzaspeaker.jpg

:I have found that restoring fragile ripped old cones is effective and easy with some very low cost (39 cents to 49 cents or so) strong and beautiful replacement cones sold through Electronix.com
:I usually cut away all the old cone from the outer edge down to a small 1/2 dollar-sized circle remaining near the center. I then take the new cone and cut a hole slightly larger than the 1/2 dollar area. I glue the new cone over the old section in the center and then just glue the outer rim of the new cone to the frame rim... Beautiful, fast easy and sounds beautiful too.
:
:Last night though I was trying to do this to a speaker whose outside diameter is 5-1/4 inches.
:But..I had only two replacement cone sizes that were close in size, a 4-1/2" which was way too small and a 6-1/8" which was way too big.
:So I thought I could just cut a slit in it and overlap the two edges like a "tighter paper funnel"... to reduce the outer diameter. Well...that was correct but still it won't work because the funnel just gets that much deeper too and that was just too steep of an angle to fit.
:
:Well the cones are so cheap I decided to get brave and experiment.
:The solution was to cut the 6-1/8" replacement cone into 6 sections or pieces like a pizza.
:Then the outer edges of each "slice" could then be easily glued to fit on the outer rim... and the pointed end can be glued over my 1/2 dollar center part easily as well.
:Then all I needed to do was overlap each slice as I glued them down and then just run a bead of glue on each overlap joint.
:Well it works!! ...and sounds terrific too.
:Take a look at the result:
:http://www.pbpix.com/pizzaspeaker.jpg
:
:
: Neat idea, Peter! I tried it, and it works like a charm! THANKS!

Bob P.

Looks like a cheap pizza to me, and without the sauce

marv

:I have found that restoring fragile ripped old cones is effective and easy with some very low cost (39 cents to 49 cents or so) strong and beautiful replacement cones sold through Electronix.com
:I usually cut away all the old cone from the outer edge down to a small 1/2 dollar-sized circle remaining near the center. I then take the new cone and cut a hole slightly larger than the 1/2 dollar area. I glue the new cone over the old section in the center and then just glue the outer rim of the new cone to the frame rim... Beautiful, fast easy and sounds beautiful too.
:
:Last night though I was trying to do this to a speaker whose outside diameter is 5-1/4 inches.
:But..I had only two replacement cone sizes that were close in size, a 4-1/2" which was way too small and a 6-1/8" which was way too big.
:So I thought I could just cut a slit in it and overlap the two edges like a "tighter paper funnel"... to reduce the outer diameter. Well...that was correct but still it won't work because the funnel just gets that much deeper too and that was just too steep of an angle to fit.
:
:Well the cones are so cheap I decided to get brave and experiment.
:The solution was to cut the 6-1/8" replacement cone into 6 sections or pieces like a pizza.
:Then the outer edges of each "slice" could then be easily glued to fit on the outer rim... and the pointed end can be glued over my 1/2 dollar center part easily as well.
:Then all I needed to do was overlap each slice as I glued them down and then just run a bead of glue on each overlap joint.
:Well it works!! ...and sounds terrific too.
:Take a look at the result:
:http://www.pbpix.com/pizzaspeaker.jpg
:
:
:

:Looks like a cheap pizza to me, and without the sauce
:
:marv
:
::I have found that restoring fragile ripped old cones is effective and easy with some very low cost (39 cents to 49 cents or so) strong and beautiful replacement cones sold through Electronix.com
::I usually cut away all the old cone from the outer edge down to a small 1/2 dollar-sized circle remaining near the center. I then take the new cone and cut a hole slightly larger than the 1/2 dollar area. I glue the new cone over the old section in the center and then just glue the outer rim of the new cone to the frame rim... Beautiful, fast easy and sounds beautiful too.
::
::Last night though I was trying to do this to a speaker whose outside diameter is 5-1/4 inches.
::But..I had only two replacement cone sizes that were close in size, a 4-1/2" which was way too small and a 6-1/8" which was way too big.
::So I thought I could just cut a slit in it and overlap the two edges like a "tighter paper funnel"... to reduce the outer diameter. Well...that was correct but still it won't work because the funnel just gets that much deeper too and that was just too steep of an angle to fit.
::
::Well the cones are so cheap I decided to get brave and experiment.
::The solution was to cut the 6-1/8" replacement cone into 6 sections or pieces like a pizza.
::Then the outer edges of each "slice" could then be easily glued to fit on the outer rim... and the pointed end can be glued over my 1/2 dollar center part easily as well.
::Then all I needed to do was overlap each slice as I glued them down and then just run a bead of glue on each overlap joint.
::Well it works!! ...and sounds terrific too.
::Take a look at the result:
::http://www.pbpix.com/pizzaspeaker.jpg
::
::
:: Hi Peter
Thats a neat idea, but if I'm correct a 5 1/4" speaker is a standard size speaker, replacing it with a new one would be easier, but more expensive as well, in any event its a very clever idea:)
Mark

Mark:
I'd love to replace it if it were available to me. I have a drawer full of 4" and 5" PM speakers.
... But this speaker is dynamic... and I didn't have that one nor are they easy to get...or so it's been my experience.
I've been trying to hunt down 5-1/4" replacement cones but so far only found the 4-1/2" and 6-1/8" and larger sizes.
But so SURE Mark..if you know where I can get them I'll buy them... either the 5-1/4" dynamic speaker assembly or the 5-1/4" cone!.
Do you know where they can be had Mark?

:Looks like a cheap pizza to me, and without the sauce
:
:marv
:

Marv:
I take it... you don't approve?
... perhaps there's another idea or solution that you have that I didn't think of?

Dry humor Peter. I've had a boring day, and on THOSE days I take cheap shots and use 1 liners. Its obvious you have a very fertile mind and active personna like me, whereas mine is more subdued. You must carry a very special "Good Luck Charm" though, with all that xtra paper and water based glue, I'm surprised the cone didn't warp outta the frame and squeal like a stuck pig rubbing the gap. I used an article from this site to make a new cone, invented my own method of creating a cloth roll for the outer suspension ring. It looks authentic and sounds great to my tin ears on talk radio. Thats when I discovered the dearth of quality AM radio (oldies, Duke, Benny, Tommy, Glen, Lombardo, Xavier) in my area, but the propagation of many interference sources made DX'ing impossible without a high gain outdoor antenna anyway.

marv

::Looks like a cheap pizza to me, and without the sauce
::
::marv
::
:
:Marv:
:I take it... you don't approve?
:... perhaps there's another idea or solution that you have that I didn't think of?

Good job, Peter. 5 and 1/4 inch cones are available, but they are hard to find. Regarding cloth surrounds, I use thin suede. Regarding hard to find 5 inch cones, what you can try, just for the heck of it, is to soak the outer edge of a 5 inch cone on one of those PM speakers with acetone. It evaporates rapidly, so you may have to re-apply. Once the glue is loose, gently lift up on the cone and remove it...perhaps remove the cushion first. Also soak by the voice coil. Don't worry about ruining the coil, as the speaker will be useless anyway.

Keep the cigs away from the acetone! (if you smoke)

T.

Good job, Peter. 5 and 1/4 inch cones are available, but they are hard to find. Regarding cloth surrounds, I use thin suede. Regarding hard to find 5 inch cones, what you can try, just for the heck of it, is to soak the outer edge of a 5 inch cone on one of those PM speakers with acetone. It evaporates rapidly, so you may have to re-apply. Once the glue is loose, gently lift up on the cone and remove it...perhaps remove the cushion first. Also soak by the voice coil. Don't worry about ruining the coil, as the speaker will be useless anyway.

Keep the cigs away from the acetone! (if you smoke)

T.

(why did my reply appear three times????....hmmm....)

T.

Good job, Peter. 5 and 1/4 inch cones are available, but they are hard to find. Regarding cloth surrounds, I use thin suede. Regarding hard to find 5 inch cones, what you can try, just for the heck of it, is to soak the outer edge of a 5 inch cone on one of those PM speakers with acetone. It evaporates rapidly, so you may have to re-apply. Once the glue is loose, gently lift up on the cone and remove it...perhaps remove the cushion first. Also soak by the voice coil. Don't worry about ruining the coil, as the speaker will be useless anyway.

Keep the cigs away from the acetone! (if you smoke)

T.

dry humor.. ok sure.. I get it... lol
Sometimes I look at things literally..

The speaker paper that you see in that picture is tough as nails!.. I mean strong and reindorced w/some kind of synthetic fibes too it seems.. heavy tough stuff.
I didn't use all water based glue. I've found some great stuff caled "Fabri-tac" a fabric & gen purpose adhesive.. it is very nice when positiong things as it is tacky and sets up soon but moveable and permanet.. even washable on fabrics so it's not water soluble.
You can get sever great glues like this in the fabric store now..Another great one is "Sobo" craft & fabric glue... fast setting all purpose.. nice!
Both these glues come in small squeeze bottles.

So why do you think it would warp or squeal or whatever?

Whenever I do something I do it so it will work properly or I'll abandon it for another solution... don't you?

This idea was the only available solution I had here.

Otherwise I'd be searching the web for weeks trying to find the 5-1/4" cones or another dynamic speaker... in the mean time the radio waits on my bench or gets stuck back in the corner.
.. why not solve it with what I can... evaluate the results and move on?

If it's not a great solution I can still always hunt around for the other more perfect parts... but in the mean time.. I've accomplished someting... and that makes me feel better than sitting around waiting... lol

Reminds me of that old cartoon where two vultures sitting on a branch looking bored and waiting for something to die so they can eat.
... So one vulture turns to the other one and says, "Hell..I'm so bored... I'm going out and kill me something"...

So.. I guess that's me... the bored vulture.... lol

:I have found that restoring fragile ripped old cones is effective and easy with some very low cost (39 cents to 49 cents or so) strong and beautiful replacement cones sold through Electronix.com
:I usually cut away all the old cone from the outer edge down to a small 1/2 dollar-sized circle remaining near the center. I then take the new cone and cut a hole slightly larger than the 1/2 dollar area. I glue the new cone over the old section in the center and then just glue the outer rim of the new cone to the frame rim... Beautiful, fast easy and sounds beautiful too.
:
:Last night though I was trying to do this to a speaker whose outside diameter is 5-1/4 inches.
:But..I had only two replacement cone sizes that were close in size, a 4-1/2" which was way too small and a 6-1/8" which was way too big.
:So I thought I could just cut a slit in it and overlap the two edges like a "tighter paper funnel"... to reduce the outer diameter. Well...that was correct but still it won't work because the funnel just gets that much deeper too and that was just too steep of an angle to fit.
:
:Well the cones are so cheap I decided to get brave and experiment.
:The solution was to cut the 6-1/8" replacement cone into 6 sections or pieces like a pizza.
:Then the outer edges of each "slice" could then be easily glued to fit on the outer rim... and the pointed end can be glued over my 1/2 dollar center part easily as well.
:Then all I needed to do was overlap each slice as I glued them down and then just run a bead of glue on each overlap joint.
:Well it works!! ...and sounds terrific too.
:Take a look at the result:
:http://www.pbpix.com/pizzaspeaker.jpg
:
:I went to electronics.com but couldn't find the .39 speaker cones. Could you give the page address?
Thanks
:

Go to electronix.com
MRO

:Go to electronix.com
:MRO
What is "MRO"?

::Go to electronix.com
::MRO
:What is "MRO"?

My sign off initails.

If you go to the electronix site and not the electronics site you can search the loudspeaker section and find the cones rather easily.

MRO

Mark:
Here's the exact page address.

http://www.electronix.com/catalog/advanced_search_result.php/keywords/cone/sort/1a/page/2