sound box membrane

inecik · Post by **inecik** » Mon Jun 22, 2020 2:21 pm

Hi,I have a problem on my sound box.sound box have bad sound.I loooked that: the membran is a bad fake membran.now my questions;What can I do,canI make a new membran.There is no a new membran in turkey.

OrthoFan · Post by **OrthoFan** » Mon Jun 22, 2020 3:16 pm

What you need is a replacement aluminum diaphragm. You may want to post a wanted ad in the UK/European Trader section of this forum, and make sure you include the diameter of the diaphragm, because they vary in size.

It is possible to make a replacement using thin aluminum or similar metals. Years ago, I made one out of an aluminum pie pan--the type that frozen pies come it--but an authentic or real diaphragm will probably work better.

Also see: viewtopic.php?f=7&t=43682

OrthoFan

Daithi · Post by **Daithi** » Mon Jun 22, 2020 7:10 pm

Your old membrane is not a fake, its just damaged.
The corrugations around the outside of the old membrane give it compliance but the damage in the center means that the membrane is not pumping properly. You need a new membrane, called a diaphragm, which you can find on Ebay.

Flat membranes without corrugations do not offer enough compliance and wear the record faster.

pallophotophone · Post by **pallophotophone** » Mon Jun 22, 2020 8:55 pm

Is that an HMV 5b soundbox? Or another HMV model?

mattrx · Post by **mattrx** » Mon Jun 22, 2020 9:38 pm

Check your measurements, this MAY be what you need.

https://www.ebay.com/itm/20-New-Old-Sto ... 890.l49292

Matt

Post by **Lucius1958** » Mon Jun 22, 2020 10:02 pm

Do you have a Facebook account?

There is a restorer on FB who lives in Ankara: his name is Mustafa Çelik. He does very good restoration work, and he may be able to repair or replace your diaphragm.

-Bill

Post by **Phono48** » Tue Jun 23, 2020 4:50 am

This is a Columbia soundbox, a badge version of the HMV No.5b, and uses the same diaphragm. It has to be that particular one, as the stylus bar has to be soldered to the reinforced hole in the centre of the diaphragm. There is no way of attaching it to the hole of any other diaphragm.

Barry

inecik · Post by **inecik** » Mon Jul 06, 2020 5:49 am

Hi, ı have made this diaghram. İt is cola can and ı heated it.

Daithi · Post by **Daithi** » Mon Jul 06, 2020 8:09 am

inecik wrote:Hi, ı have made this diaghram. İt is cola can and ı heated it.

Wow, totally blown away by that, well done.

VanEpsFan1914 · Post by **VanEpsFan1914** » Mon Jul 06, 2020 1:10 pm

You're very talented-- I bet it sounds great now!

sound box membrane

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