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DIY Reconing Precision Devices PD.154 - yes or no?

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Isonoe View Drop Down
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    Posted: 13 April 2018 at 2:50pm
Hi,

one of our PD154 drivers died recently. We have the option to buy new (245 €) or get a reconing kit (90 € - https://www.thomann.de/at/precision_devices_pd154rk_recone_kit.htm?ref=search_prv_0)

We have no former experience with reconing. 

How difficult is reconing generally? And with that specific kit where it comes already with the main parts assembled? 

We heard that reconing often is leading to new failure, is that true and better buy new?

Also, which glue is recommended? It doesn't seem that the kit contains it.

If we'd do it we would follow a couple of youtube tutorials we found so far:
https://www.youtube.com/watch?v=x6CCrLz-Zts
https://www.youtube.com/watch?v=6b6tq-1TNr4 (very funny, on a sidenote)

Appreciate your feedback.


Edited by Isonoe - 13 April 2018 at 2:58pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Hemisphere Quote  Post ReplyReply Direct Link To This Post Posted: 13 April 2018 at 2:59pm
Tutorials are available online so you can try and assess the difficulty yourself by watching those, and maybe take some old scrap drivers if you have any laying around, and see if you can familiarise yourself with the processes, parts and precision involved using those scrap parts as a reference.

People do 'amateur' recones all the time with good results, but one person's amateur may be another person's professional.

If you're not comfortable with reconing yourself, there are professionals who will do it for you, and it'll still work out at less than the cost of a new driver, so that's another option to think about.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote studio45 Quote  Post ReplyReply Direct Link To This Post Posted: 13 April 2018 at 4:44pm
It's not that hard and a valuable skill to learn.
No. 1 important thing is to make sure you get *all* the old glue off. New glue won't stick to old glue. If the paint comes off with it, that's not a problem. If you have to get the heat gun, chisels and sandpaper out, that's also sometimes necessary. It's got to be down to bare metal everywhere the new glue will go.
But first, make absolutely sure there is nothing left in the magnetic gap. Hold it upside down, blow it out with air-duster and then clean the surfaces with inside-out masking tape, inspect carefully with a bright light. Do that before you attack the glue, and then put tape over it so nothing else falls in.
I always use Evo-Stik contact adhesive, which if you follow the instructions and are careful with your applicator, produces a very strong bond. You can also use thick cyanoacrylate, but obviously that stuff sticks a bit more quickly than contact so you've got a smaller time window to get the kit nicely centred and comfortable in the frame.
Finally don't forget the shims - they come with the kit, you need to use all of them, and get them evenly spaced in the gap. And, of course, don't accidentally get any glue on them otherwise you won't get them out.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote markie Quote  Post ReplyReply Direct Link To This Post Posted: 13 April 2018 at 6:11pm
It 'aint rocket science. Follow the instructions carefully, take your time and  the driver will be as good as new.
Some manufacturers make you attach the voice coil to the cone, but it looks as though the PD ones are already fitted, so no problem there.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mini-mad Quote  Post ReplyReply Direct Link To This Post Posted: 13 April 2018 at 6:14pm
Nice tips!... sounds like you have found a few ways not to do it before you mastered it yourself!


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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bams Quote  Post ReplyReply Direct Link To This Post Posted: 13 April 2018 at 6:55pm
calm does the trick. All above is true but it might take more time as you might think. And the glue: indeed not even one bit of the old should remain, i found out the hard way.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Risc_Terilia Quote  Post ReplyReply Direct Link To This Post Posted: 15 April 2018 at 11:15pm
I reconed a pair of PD154s as my first time.  Just go very slowly (think days not hours) and be meticulous with cleaning.  
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dub Specialist Sound Quote  Post ReplyReply Direct Link To This Post Posted: 15 April 2018 at 11:39pm
If kit is pre asembled pretty easy ,if not gets a bit more trickier
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Hemisphere Quote  Post ReplyReply Direct Link To This Post Posted: 16 April 2018 at 7:42am
If it's gonna take days then the money saving goes out the window really doesn't it? If your time's worth more than that, a professional recone is still a decent alternative to buying a new driver.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Risc_Terilia Quote  Post ReplyReply Direct Link To This Post Posted: 16 April 2018 at 10:25am
Originally posted by Hemisphere Hemisphere wrote:

If it's gonna take days then the money saving goes out the window really doesn't it? If your time's worth more than that, a professional recone is still a decent alternative to buying a new driver.

Depends on the value you place in learning a skill.  Also if you were going to go down the pub with your mates and you actually stay in a recone a driver then the money saying comes back in the window LOL
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Post Options Post Options   Thanks (0) Thanks(0)   Quote norty303 Quote  Post ReplyReply Direct Link To This Post Posted: 16 April 2018 at 12:32pm
An eminent and anonymous person sent me a recone guide that I posted as a sticky when I was still admin some years ago. Should be around somewhere I think...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote norty303 Quote  Post ReplyReply Direct Link To This Post Posted: 16 April 2018 at 12:34pm
Like, right at the top of General....

P.S. I seem to recall the old PD kits came with VC and cone separate, which makes it a little more tricky.

I jumped in and did my first recons with some Beyma, which were good quality kits with everything included and good instructions.

https://forum.speakerplans.com/a-recone-guide_topic29715.html
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