Author Topic: Who would like an ultra-low distortion audio oscillator PCB?  (Read 32525 times)

0 Members and 1 Guest are viewing this topic.

Offline dirkwright

  • Contributor
  • Posts: 17
Re: Who would like an ultra-low distortion audio oscillator PCB?
« Reply #25 on: March 28, 2013, 04:43:50 pm »
Yes Glen, I got your board up and running! Thanks so much! I made one small mistake that was gratefully not fatal. Once corrected, it runs great but I have not had the time to tune it up yet.
 

Offline AKN

  • Newbie
  • Posts: 2
  • Country: se
Re: Who would like an ultra-low distortion audio oscillator PCB?
« Reply #26 on: April 01, 2013, 06:27:55 pm »
Hi all,

My first post on this forum.

Suppose I'm one of the two who has reported a working oscillator. I bought two PCB's, one for myself (ready two months ago) and one for a friend. The latter got fired up and tested OK just two hours ago. I can now confirm that one more (third?) oscillator is up and running.

Glen, many thanks for designing this oscillator and supplying PCB's.

Best Regards/ Anders
 

Offline AKN

  • Newbie
  • Posts: 2
  • Country: se
Re: Who would like an ultra-low distortion audio oscillator PCB?
« Reply #27 on: April 02, 2013, 10:33:17 am »
No better than -100dB HD and -120dB noise floor. My current sound card setup is not sufficient for measuring this oscillator. I could implement a notch but first I will rework my test setup.
 

Offline AudioplatinumService

  • Contributor
  • Posts: 43
  • Country: hr
    • www.audioplatinum.net
Re: Who would like an ultra-low distortion audio oscillator PCB?
« Reply #28 on: January 02, 2014, 09:40:31 am »
Hi

I am interested in one board, any left? Maybe too late...  :-\

Best Regards,
Raf
Audioplatinum Service
www.audioplatinum.net
A clean desk is the sign of a sick mind...
 

Offline Po6ept

  • Regular Contributor
  • *
  • Posts: 89
  • Country: 00
Re: Who would like an ultra-low distortion audio oscillator PCB?
« Reply #29 on: January 03, 2014, 04:58:13 am »
If you ever think of ordering another batch, please count me in.
 

Offline burbeck

  • Newbie
  • Posts: 4
  • Country: gb
Re: Who would like an ultra-low distortion audio oscillator PCB?
« Reply #30 on: January 03, 2014, 09:27:09 pm »
hi Glen
put me down for a pcb if you do another batch

kind regards
bob
regards
bob
 

Offline rob040

  • Contributor
  • Posts: 38
  • Country: nl
Re: Who would like an ultra-low distortion audio oscillator PCB?
« Reply #31 on: March 03, 2016, 09:20:02 pm »
I would like to build Glens ultra-low distortion audio oscillator (including the line driver part). It's for personal use (hobby).
Does anyone have the gerber files available?
I tried to contact Glen, but can't get through :-(
 

Offline DanNorman

  • Contributor
  • Posts: 13
  • Country: se
Re: Who would like an ultra-low distortion audio oscillator PCB?
« Reply #32 on: March 04, 2016, 06:51:59 pm »
Me too!
I suppose the files are available still?
 

Offline _Wim_

  • Super Contributor
  • ***
  • Posts: 1514
  • Country: be
 

Offline rob040

  • Contributor
  • Posts: 38
  • Country: nl
Re: Who would like an ultra-low distortion audio oscillator PCB?
« Reply #34 on: March 08, 2016, 01:13:44 pm »
Maybe a bit less fun, but I can fully recommend this guy boards:
Distortion figure is excellent, but indeed (much) less fun. Only one frequency per board available and as far as I could see the guy has only two frequencies in his portfolio.
Glen's version has 12 frequencies spread over the audio spectrum.

@DanNorman: I could not find them, therefore my appeal in this threat. If you catch them, please drop me a line.
 

Offline _Wim_

  • Super Contributor
  • ***
  • Posts: 1514
  • Country: be
Re: Who would like an ultra-low distortion audio oscillator PCB?
« Reply #35 on: March 08, 2016, 08:45:01 pm »
Yes, only a couple of frequency's available from this guy. I think it depends what your actual use is. In my case, I use it as a reference to challenge my audio measurement system (pc with good qualitiy sound card). By having an ultra low distorsion generator I can check how much distorsion in introduced by the measumenet system itself (at a single frequency of course...)

If you want many frequencys and DIY, I would built a good quality DAC board with optical digital input and power this board from an isolated power supply. Test signals I would generate with one of the many audio measurement softwares available for free (I presume you pc has a digital out, otherwise you will need an additional sound card).

If you want an analyzer also, just build an ADC board the same way. By using the optical digital out/in and isolated power supplies (seperate power supply for DAC and ADC), you avoid ground loop issues when connecting to the DUT. Don't forget to install some input protection on the ADC if you want to test amplifiers also.

For an isolator power supply, these look like a very good deal: http://www.mouser.be/new/murata/murata-ps-nxe1/
 

Offline rob040

  • Contributor
  • Posts: 38
  • Country: nl
Re: Who would like an ultra-low distortion audio oscillator PCB?
« Reply #36 on: March 16, 2016, 01:59:16 pm »
Hi Wim,

Thanks for thinking out loud. To be honest, I am more in for analog circuits. Easier to understand and also more fun to build (for me anyway).

I want to build a good sine wave oscillator with multiple frequencies in the audio range (up to 100kHz) and a THD meter to judge audio equipment.
Bob Cordells project is a nice one, certainly with the PCB's that Guiliano designed. Slightly better is the design of Glen, but then it would be nice to have the gerbers. Still browsing for them.

There is a lot to read and learn on the net. And I'm not in a hurry.

Best regards,

Rob.
« Last Edit: March 16, 2016, 02:05:20 pm by rob040 »
 

Offline _Wim_

  • Super Contributor
  • ***
  • Posts: 1514
  • Country: be
Re: Who would like an ultra-low distortion audio oscillator PCB?
« Reply #37 on: March 16, 2016, 06:35:38 pm »
Building analog stuff indeed can be fun, so no argument against that. Keep us updated on your project!
 

Offline JoeD

  • Contributor
  • Posts: 26
  • Country: gb
Re: Who would like an ultra-low distortion audio oscillator PCB?
« Reply #38 on: April 26, 2016, 10:53:44 am »
Please put me down for a board also. Let me know when it's time to pay!

Regards

JoeD
You don't know 'til you try!
 

Offline deephaven

  • Frequent Contributor
  • **
  • Posts: 796
  • Country: gb
  • Civilization is just one big bootstrap
    • Deephaven Ltd
Re: Who would like an ultra-low distortion audio oscillator PCB?
« Reply #39 on: May 01, 2016, 05:17:32 pm »
I have just uploaded all of the design files for my low distortion/noise signal generator here:

http://www.glensstuff.com/generator/

Thanks Glen.

 

Offline timb

  • Super Contributor
  • ***
  • Posts: 2536
  • Country: us
  • Pretentiously Posting Polysyllabic Prose
    • timb.us
Re: Who would like an ultra-low distortion audio oscillator PCB?
« Reply #40 on: May 02, 2016, 12:24:01 am »
I have just uploaded all of the design files for my low distortion/noise signal generator here:

http://www.glensstuff.com/generator/

Thanks!
Any sufficiently advanced technology is indistinguishable from magic; e.g., Cheez Whiz, Hot Dogs and RF.
 

Offline rob040

  • Contributor
  • Posts: 38
  • Country: nl
Re: Who would like an ultra-low distortion audio oscillator PCB?
« Reply #41 on: May 05, 2016, 04:53:27 pm »
Thanks Glen for making the files available again and the updates. Appreciate it!
 

Offline markirwin

  • Newbie
  • Posts: 3
  • Country: au
Re: Who would like an ultra-low distortion audio oscillator PCB?
« Reply #42 on: May 10, 2016, 06:30:20 am »
Hi Guys,

I see that the files are no longer available from glenstuff? Does anyone have them?

Mark
 

Offline Pjotr

  • Frequent Contributor
  • **
  • Posts: 461
  • Country: nl
Re: Who would like an ultra-low distortion audio oscillator PCB?
« Reply #43 on: May 15, 2016, 03:50:12 pm »
Indeed, what happened? Without what abouts this thread looks empty.
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf