What Are You Working On Now ?

524 replies
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Steffen
Offline
Steffen
Gold
Posted October 10, 2011 at 17:31 GMT
#1758781

Thank you for your explanation, Søren.
However - I have to tell that I learned this (sodium hydroxide thing) when I was a teenager, following a electronics course. (As you say -the oxidation protects the surface).
Here I build my first amplifier -japanese style -with an aluminum frontplate and lots of knobs and buttons.
I sanded an aluminum plate and treated the surface as mentioned earlier in this thread. I still have it -and the aluminum still looks good. 
Now -many years later - neither the oxidation, nor the aluminum is gone 😕

I must add...I have not tried to pour beer or cola over it 😂👍

My B&O Icons:

BeoCenter-9500.png BeoCenter-9500.png
Beoremote-Beo4.png Beoremote-Beo4.png
Beovox.png Beovox.png
Beovision-10.png Beovision-10.png
Beosound.png Beosound.png
Beosound-5.png Beosound-5.png
Beosound-4.png Beosound-4.png
Beoplay-S3.png Beoplay-S3.png
Beoplay-A1.png Beoplay-A1.png
Beomaster.png Beomaster.png
Beocenter-2.png Beocenter-2.png
mexking
Offline
mexking
Bronze
Posted October 15, 2011 at 16:31 GMT
#1758782

Steffen, As Einstein truly remarked "All is relative", so is time, in 100 years your alu is gone, but so will your Jap. amp. be.😂

Take a look at how Leslie do his refurb, perfect until the last detail, he will not be happy with "only" caustic soda treatment.😁

And I will try caustic soda on a pair of items, just to see how it comes out, also over time.

 

Location: Mexico city

Retired
Printing machine technician
Restored various 1960-70 items
Rock and Roll music
Collecting Vinyl
Restored Jukebox Wurlitzer 1050
mexking
Offline
mexking
Bronze
Posted October 15, 2011 at 16:35 GMT
#1758783

At the moment I'm working hard on my siesta, after that I have to open my BM 2400 again, it came back with the old failure, changing channels by itself, and after doing that for one or 2 hours  it turned of.

Location: Mexico city

Retired
Printing machine technician
Restored various 1960-70 items
Rock and Roll music
Collecting Vinyl
Restored Jukebox Wurlitzer 1050
Evan
Offline
Evan
Gold
Posted October 15, 2011 at 20:44 GMT
#1758784

Søren Mexico wrote:

and after doing that for one or 2 hours it turned of.

You just let your BeoMaster do what it wants? 😂

BM2400: "Well, it doesn't seem like anything good is on, I think I'll just go to sleep." (Click)

Location: San Francisco

I'm an automotive audio and acoustic engineer. I design loudspeakers and full sound systems for new automobiles. I also dabble with studio, consumer and pro audio projects from time to time.
Evan
Offline
Evan
Gold
Posted October 15, 2011 at 22:11 GMT
#1758785

Just got done with my calculus home work, now going to try and make some progress on my headphone amp pcbs.

Location: San Francisco

I'm an automotive audio and acoustic engineer. I design loudspeakers and full sound systems for new automobiles. I also dabble with studio, consumer and pro audio projects from time to time.
A(
Offline
advanced (archived)
Bronze
Posted October 17, 2011 at 05:24 GMT
#1758786

Sanded an awfull painted set of CX50 in high gloss black and sprayed in matt black. As finishing touch, I dusted with metalic flakes. As an experiment I recloth the speakergrills.  I have an extra grill set with new reproduction black cloth.

What do you think of the cloth in black&silver? 

L(
Offline
Leslie (archived)
Bronze
Posted October 21, 2011 at 10:31 GMT
#1758787

Restored my Grundig tweeters from which I have made the aluminium base and connected this pair with the bassbox to my Beocenter BC9000. Great sound!

Evan
Offline
Evan
Gold
Posted October 21, 2011 at 10:38 GMT
#1758788

Leslie,

Those. Are. Stunning!!

Location: San Francisco

I'm an automotive audio and acoustic engineer. I design loudspeakers and full sound systems for new automobiles. I also dabble with studio, consumer and pro audio projects from time to time.
L(
Offline
Leslie (archived)
Bronze
Posted October 21, 2011 at 10:49 GMT
#1758789

They are Evan, to be honest, I like them more than the Beovox 2500

N(
Offline
NoBit (archived)
Bronze
Posted October 21, 2011 at 13:37 GMT
#1758790

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