audiophreak

Re: Neumann W492 equalizer DIY project (PCB docs added)
« Reply #400 on: June 30, 2010, 05:36:30 PM »

 .... what I do...fart   ;D

   after spending a little more time with these I like how they sound especially the upper mid section and am going to install a bigger PT. It seems to be working fine but want the rails closer to specs.

  Thanks again to audiox and everyone who contributed, without this forum and the people in it I would not have found this wonderful hobby

btw  -  envelope - how are you doing with this project ?
" Music washes away from the soul, the dust of everyday life "   ... in loving memory of my Father.


audiophreak

Re: Neumann W492 equalizer DIY project (PCB docs added)
« Reply #401 on: July 01, 2010, 04:21:18 PM »
  Thanks !
               I'm glad you like the knobs, and that's awesome customer service, I'm happy it all worked out for you ( I'll bet it took a little bit of the " Sting " from those Sfernice P11A's )  sounds like you have a good proses.

   Keep us informed of your progress and parts selections.  ;)
" Music washes away from the soul, the dust of everyday life "   ... in loving memory of my Father.

JBVries

Re: Neumann W492 equalizer DIY project (PCB docs added)
« Reply #402 on: July 02, 2010, 04:10:56 PM »
Can someone tell me what kind of power these thugs take and a potential adequate PSU as I can't seem to find that info anywhere and my 492s are pretty much finished. Cheers and thanks in advance.

-JB
A little bit of the sonic mayhem I bring to the table.....

http://www.soundcloud.com/jbvries

audiophreak

Re: Neumann W492 equalizer DIY project (PCB docs added)
« Reply #403 on: July 02, 2010, 04:57:34 PM »
   envelope - That looks awesome !  is the case painted or powder coated ?  I like the contrast with the dark case, brushed aluminum Dans panels, black knobs with white caps. very cool  :)   and of course the N.. badge     ...  any inside pix ?

  JBVries - I used part # 70053 - from Digikey, its 500mA  CT secondaries in series for 4 units and I think I pushed it to the limit, am going to replace it with a #70063 that is 842mA in the same config. , but the 70053 should be fine for 2 units , although I dont know if it will fit in a 1U case or not .

  EDIT - the #62053 will fit in a 1U case, I'm using this one for a quad of SSL9K's - hope this helps
« Last Edit: July 02, 2010, 05:23:22 PM by audiophreak »
" Music washes away from the soul, the dust of everyday life "   ... in loving memory of my Father.

mikefatom

Re: Neumann W492 equalizer DIY project (PCB docs added)
« Reply #404 on: July 05, 2010, 12:55:25 PM »
Stuart, that's a beauty! Really nice wiring work and layout!

Are those 0.1% vishay resistors throughout that I see?

Sweet!  8)

edit: nevermind, I just saw your post mentioning the 1% Dale resistors. :)

audiophreak

Re: Neumann W492 equalizer DIY project (PCB docs added)
« Reply #405 on: July 05, 2010, 04:00:36 PM »
Stuart, that's a beauty! Really nice wiring work and layout!


Sweet!  8)


  X2 ...  Thats some beautiful work !   gotta figure out how to get my wiring that nice  ;D

btw ,  what opamps  did you end up using ?
" Music washes away from the soul, the dust of everyday life "   ... in loving memory of my Father.

audiophreak

Re: Neumann W492 equalizer DIY project (PCB docs added)
« Reply #406 on: July 07, 2010, 11:19:23 PM »

Ha Ha !!  I'll have to try that  ;D

   What models of Analog Design OpAmps are compatible ? if they're not too expensive I wouldn't mind getting a set and A/B with one of the other channels.

  On another note, I got a hold of a signal generator and went to calibrate the  W492s. I found that the trimmers had very little effect on the level - like only 1.5db . but they were all very close and was able to get them +- 0.5db -  were yours similar ?

I perf boarded a tube heater supply for a G9, and got the legs on the trimmer wrong and experienced a similar result, but wouldn't  the pin config on the PCB prohibit that ?
" Music washes away from the soul, the dust of everyday life "   ... in loving memory of my Father.

audiophreak

" Music washes away from the soul, the dust of everyday life "   ... in loving memory of my Father.

drummerjoe31761

Re: Neumann W492 equalizer DIY project (PCB docs added)
« Reply #408 on: July 25, 2010, 07:50:49 PM »
I have a complete Behringer P/S from one of their tube comps? I vandalized, Do you think I could adapt it for this project, I've looked for the Schemo's but haven't found the yet
Thanks
Joe

adrian

Re: Neumann W492 equalizer DIY project (PCB docs added)
« Reply #409 on: July 27, 2010, 08:06:43 AM »
 i built 14 of these eq for a project and i like them very much!!! thank you audiox!
I 'd like to add a variable HPF to these (maybe 2 positions 100hz and 180 hz), so i'm looking for a good schematic!
i looked on the forum and on the internet but i don't know how i could add something like that to these eq, do i need a symetrical HPF schematic or could i take an asymmetrical signal somewhere in the signal path, send it to the hpf and then re-send it to the eq?


Morelius21

Re: Neumann W492 equalizer DIY project (PCB docs added)
« Reply #410 on: November 09, 2010, 07:39:15 AM »
Hi people,

I want make 2 eq but I have a question. In Gustav set is incluided de psu pbc? or  I must make mine?  can you tell me where to look the informantion?
I'm new and I'm still learning to move around here  :D

Thanks 
Morelius

adrian

Re: Neumann W492 equalizer DIY project (PCB docs added)
« Reply #411 on: November 09, 2010, 12:01:56 PM »

as i know gustav doesn't sell power supply with these project,
but you can find some very good power supply on jlm audio website,

i think you could also use the ssl9K power supply,



deneme

Re: Neumann W492 equalizer DIY project (PCB docs added)
« Reply #412 on: December 12, 2010, 05:02:22 AM »
Potentiometers should be? Single or double?
What characteristics could you help what should I take?


I use it?

3nity

Re: Neumann W492 equalizer DIY project (PCB docs added)
« Reply #413 on: December 12, 2010, 10:51:29 AM »
read the first pages of this thread.
Life is a path, death the destination.

JBVries

Re: Neumann W492 equalizer DIY project (PCB docs added)
« Reply #414 on: December 14, 2010, 11:27:30 PM »
Finally finished mine. Love it!!!
A little bit of the sonic mayhem I bring to the table.....

http://www.soundcloud.com/jbvries

3nity

Re: Neumann W492 equalizer DIY project (PCB docs added)
« Reply #415 on: December 15, 2010, 12:19:51 AM »
Im in the process of racking mine too.
The only problem im encountering its nice and affordable knobs for the Omeg pots.
Shaft diameter is 4mm.

yes they sound great too.
Life is a path, death the destination.

JBVries

Re: Neumann W492 equalizer DIY project (PCB docs added)
« Reply #416 on: December 15, 2010, 12:35:19 AM »
Im in the process of racking mine too.
The only problem im encountering its nice and affordable knobs for the Omeg pots.
Shaft diameter is 4mm.

yes they sound great too.

I found these based on my EQN build......

Go to digikey and type in Kilo in the search. Then select 3.18mm shaft. If they will work on the 4mm Sfernice pots on the EQN I don't see why they wouldn't work here. Maybe not authentic but it's something to check out. Otherwise it'll be about $65 for a 4mm collet set with colored inserts from Canford. Cheers!

A little bit of the sonic mayhem I bring to the table.....

http://www.soundcloud.com/jbvries

zayance

Re: Neumann W492 equalizer DIY project (PCB docs added)
« Reply #417 on: December 15, 2010, 05:04:35 AM »
Quote
If they will work on the 4mm Sfernice pots on the EQN I don't see why they wouldn't work here

The Sfernice type knobs that Peter proposed for the EQN have 3.18mm Shaft not 4mm, but maybe it fitted yours nicely? I'd like to know, because could make the pots turn not very centered...
http://uk.farnell.com/vishay-sfernice/prv6saabjyb25103ka/potentiometer-10k/dp/8795711?Ntt=8795711
« Last Edit: December 15, 2010, 05:15:58 AM by zayance »

JBVries

Re: Neumann W492 equalizer DIY project (PCB docs added)
« Reply #418 on: December 15, 2010, 04:26:09 PM »
Yeah I might have to redact that. I have not tried this and thought that the shafts might be similar enough for this. My mistake.
A little bit of the sonic mayhem I bring to the table.....

http://www.soundcloud.com/jbvries

Re: Neumann W492 equalizer DIY project (PCB docs added)
« Reply #419 on: February 03, 2011, 05:07:42 AM »
I have build 3 W492 units, with SSL9k PSU.
When the machines are cold and i turn on i have no signal out(audio), the +15V is missing (on the PSU). I have to  turn off and on, and the +15V come and everything work ok.

I tried to deconnect the W492 PCB, and the +15V on the PSU board is ok, no need to turn off and on. It same on 3 unit.
My transformer is 25VA, my EQ with true bypass consume less than 200mA, so it's more than enough

Does anyone had the same problems?  :-[
« Last Edit: February 03, 2011, 05:20:28 AM by marcfrom »


 

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