DIY 40 step attenuator, anyone interested in such??? - Page 3 - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 8th June 2004, 04:38 AM   #21
AKSA is offline AKSA  Australia
diyAudio Member
 
Join Date: Sep 2001
Location: Melbourne, Australia
Magura,

I think lots of people are interested; but there's another issue; time. You have to hit them at the right time; most people are completely disinterested in other aspects of their projects until they get to it; they develop everything serially.

I must say I like your icon; that girl has quite a presence......

Cheers,

Hugh
__________________
Aspen Amplifiers P/L (Australia)
www.aksaonline.com
  Reply With Quote
Old 8th June 2004, 11:26 PM   #22
Magura is offline Magura  Denmark
diyAudio Member
 
Magura's Avatar
 
Join Date: Oct 2003
Location: Denmark, Viborg
You are most likely right to some extend...I guess its also a matter of the target group. This is not exactly a construction/engineering/machining forum

I just thought that if anyone would capable of making such a switch would like to join, they should have the offer.

Magura
__________________
Everything is possible....to do the impossible just takes a little while longer.
www.class-a-labs.com
  Reply With Quote
Old 8th June 2004, 11:36 PM   #23
diyAudio Senior Member
 
fdegrove's Avatar
 
Join Date: Aug 2002
Location: Belgium
Hi,

Magura,

Quote:
I just thought that if anyone would capable of making such a switch would like to join, they should have the offer.
Sure, why not.
But that switch doesn't have to be made right here and now...has it?

Not necessarily by our own tools either, I'd hope...
I mean there are specialised workshops that could do this if they're given some plans to go on, no?

Cheers,
__________________
Frank
  Reply With Quote
Old 8th June 2004, 11:52 PM   #24
Magura is offline Magura  Denmark
diyAudio Member
 
Magura's Avatar
 
Join Date: Oct 2003
Location: Denmark, Viborg
You would have to be able to make the parts yourself, else it would become a 1000+ USD switch. I have estimated a minimum of 10 CNC machine hours which translates into minimum 20 conventional machine hours, plus another 15 man hours at least.

A CNC hour is at least 75USD around here, conventional machine hours are like 50-60 USD here.

This was aimed at guys like Chipco, EKD and the like

Magura
__________________
Everything is possible....to do the impossible just takes a little while longer.
www.class-a-labs.com
  Reply With Quote
Old 9th June 2004, 12:04 AM   #25
diyAudio Senior Member
 
fdegrove's Avatar
 
Join Date: Aug 2002
Location: Belgium
Hi,

Quote:
This was aimed at guys like Chipco, EKD and the like
Can't blame me for trying, can you?

I guess this is the kind of work that's hard to make more economical by running larger series of the same item...

Cheers,
__________________
Frank
  Reply With Quote
Old 9th June 2004, 02:00 AM   #26
diyAudio Member
 
Brian Donaldson's Avatar
 
Join Date: Jan 2003
Location: Texas, Love it or leave it
Maybe you could team up with one of our members from India who could produce and export.

I understand and applaudyour effort. If I had the time and a lathe, I would build one just for the learning. If I had a large CNC mill, I would machine some huge heat sinks out of 50 Kg blocks of aluminum, just to have the boldest and most expensive heat sinks.

Get to it mate. I want to see this masterpiece.
  Reply With Quote
Old 9th June 2004, 02:41 AM   #27
Magura is offline Magura  Denmark
diyAudio Member
 
Magura's Avatar
 
Join Date: Oct 2003
Location: Denmark, Viborg
I have no intentions to make this a commercial effort, if I had, I could produce the switches myself for about the same price as they can in india, as its a matter of machine hours if made in larger numbers, and a machine hours price is defined by the price of the machine, not the location.

Hmm, huge machined heatsinks...wait a minute didnt I make a bunch of those a while ago

www.briangt.com/gallery/magura

6 kilograms a piece

Made 12 of them for my zen project.

Still got a lot of deburring to do


The point of this exercise is though to get around some of the issues the commercial switches have. Naturally there is a reason for elma and the like to not make such a switch as Im working on. The cost is a big factor, a limited target group would be another reason not to make such a product. I guess such a switch could be retailing for around 500-600USD for a single layer switch, that would keep pretty much any potential customer at bay I guess???

I guess its time for a quick description of what this exercise is really all about.

The point is to get rid of the steps in the listening level, I am aware of that the steps cant be 100 % eliminated, but at steps smaller than 3db, it should be bareable.

Second aim is to make a switch that will virtually last for ever, sealed, solid silver contacts, BeCu slider, titanium springs (or ceramic if I can get my hands on such) and dampened CuBe shaft.

Add a handfull of ballbearings and you got the full picture



Magura
__________________
Everything is possible....to do the impossible just takes a little while longer.
www.class-a-labs.com
  Reply With Quote
Old 9th June 2004, 03:16 AM   #28
Magura is offline Magura  Denmark
diyAudio Member
 
Magura's Avatar
 
Join Date: Oct 2003
Location: Denmark, Viborg
A little resizeing later...
Attached Images
File Type: jpg p1.jpg (40.7 KB, 216 views)
__________________
Everything is possible....to do the impossible just takes a little while longer.
www.class-a-labs.com
  Reply With Quote
Old 9th June 2004, 03:18 AM   #29
Magura is offline Magura  Denmark
diyAudio Member
 
Magura's Avatar
 
Join Date: Oct 2003
Location: Denmark, Viborg
And the second pic.
Attached Images
File Type: jpg p2.jpg (45.2 KB, 170 views)
__________________
Everything is possible....to do the impossible just takes a little while longer.
www.class-a-labs.com
  Reply With Quote
Old 10th June 2004, 02:11 AM   #30
Magura is offline Magura  Denmark
diyAudio Member
 
Magura's Avatar
 
Join Date: Oct 2003
Location: Denmark, Viborg
Update:

Did the CNC programming for the plates that holds the contacts and the resistors today.

Mark from canada (a member as well) have sorted out the 3mm PCB for this part, it is on its way to Denmark by iceberg hopping eskimo as i write this.

I hardened the die for the contacs today as well (see pic in earlier post).

Magura
__________________
Everything is possible....to do the impossible just takes a little while longer.
www.class-a-labs.com
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
24 Step Attenuator poynton Parts 1 9th January 2008 07:26 AM
23 step attenuator tryonziess Chip Amps 2 21st May 2007 12:33 PM
12 step 10k attenuator problem vdi_nenna Everything Else 2 26th July 2005 07:10 PM
Alps step attenuator kmtang Tubes / Valves 5 30th May 2005 11:51 AM


New To Site? Need Help?

All times are GMT. The time now is 04:39 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2