The Workbench

Re: Beomaster 4400 - A Total Refurbishment

Dillen — Fri, 06 May 2011 08:28:38 GMT

Yes,

As Olly says, I wouldn't recommend just squirting contact cleaner into those potentiometers.
There's plenty of gunk in there already and none of it would be removed by spraying more nasties in there..

It's already mentioned a couple of places on Beoworld and to avoid typing it all again, you can read
a little more here :
http://forum.beoworld.org/forums/p/28842/227345.aspx#227345
http://forum.beoworld.org/forums/p/36724/305145.aspx#305145

- and for that, I'm sure that your Philips stuff is suitable.

Martin

Re: Beomaster 4400 - A Total Refurbishment

Step1 — Fri, 06 May 2011 03:00:54 GMT

Soren in all honesty you might want to look at my 8000 thread. I did an experiment with contact cleaner and have come to the conclusion, like Martin that it should only be used for a temporary solution, or perhaps when it is un-economical or not possible to strip the potentiometer and clean manually!

Try it - use your cleaner on one and pull that plus another apart to compare and you will see!

*I have a picture somewhere I will have a dig later..

Re: Beomaster 4400 - A Total Refurbishment

Søren Hammer — Fri, 06 May 2011 02:04:44 GMT

For reviving this thread:

I have some Philips contact cleaner in a spray can, standard stuff from the 80's. Can that be used to clean the faders/pots?

should i buy some "fader lube" for refreshing the faders? http://cgi.ebay.co.uk/Caig-Deoxit-Fader-Lube-Potentiometer-Cleaner-14g-/380180866806?pt=UK_Consumer_Professional_RL&hash=item58848ba6f6#ht_1750wt_970

As I have recieved my 4400 again, I will resume the process

Re: Beomaster 4400 - A Total Refurbishment

Step1 — Tue, 16 Nov 2010 07:09:50 GMT

Deoxit is available from Ebay UK. Not cheap but from what I have heard the lesser amount required might mean long term similar price..?

Re: Beomaster 4400 - A Total Refurbishment

yachadm — Mon, 15 Nov 2010 21:27:43 GMT

No problem, but I don't have stock here!

I'm sure that if you ask on the North America BeoWorld forum, someone there will be happy to help!

Re: Beomaster 4400 - A Total Refurbishment

Søren Hammer — Fri, 29 Oct 2010 01:20:03 GMT

That sounds nice, can i PM you if I can't find them in Denmark?

Søren

Re: Beomaster 4400 - A Total Refurbishment

yachadm — Wed, 27 Oct 2010 09:40:00 GMT

Soren

Good luck - I'm looking forward to your pictures.

I now use DeOxit products - I finally found stuff that really works well.

Contact cleaner is DN5S-6N ; Pot/fader cleaner and lube is F5S-H6.

I'm not sure if they're even available outside the US. I have a friend buy them for me, and mail them.

Menahem

Beomaster 4400 - A Total Refurbishment

Søren Hammer — Mon, 25 Oct 2010 14:55:59 GMT

Hello,

For some time I have wanted to get my old 4400 which I inherited from my grandparents up and running again. I handed it in to an old friend of my Father, a retired B&O tech. To make a long story short; something happened, and I can't get my 4400... But: My other granddad has a 4400, which I maybe am allowed to take over! I will replace all electrolytic capacitors, clean the switch mechanism and then adjust it to maximum performance. Shortly: I want to make a 32 year old radio function like it just had rolled off the factory

Armed with the trusty old service manual, a soldering iron and a bunch of patience, this is going to be great!

Pictures sure will come as the process gets along, hopefully nicely in these cold months.

By the way, any ideas on how to clean that push button mechanism and sliding pots properly?

-Søren