Low distortion audio oscillator board/kit - are any still available?

[cvanc]

There used to be one or two of these available - fixed frequency oscillator boards with low distortion at a very reasonable price.  Some were kits and some were pre-stuffed boards ready to go into your own enclosure.

I'm on the hunt for one and it seems they may have gone the way of the dodo bird; I can't really find any!  Are you aware of one that I might have missed?

To clarify, 'low distortion' to me means well under 0.1% THD.  The kits I can currently find are specified at this value and I'd like to do better (or even MUCH better) if possible.  Thanks.

[RandallMcRee]

Try posting in this thread:

http://www.diyaudio.com/forums/equipment-and-tools/205304-low-distortion-audio-range-oscillator-706.html

Vicnic is the fellow who has the 0.001% oscillators (proven) available.

He says--send him a PM.

[cvanc]

Thank you!  I've sent him a PM.

[RGK]

Three nice low-distortion options are:

- Viktors pre-built oscillator
- Janascard project
- Frex project

BK

[cat87]

Frex's design is based on App Note 67 from Linear. You can find it here: http://cds.linear.com/docs/en/application-note/an67f.pdf page  62.

[oldway]

Some informations about Wien bridge low distortion oscillator.

[trys]

Frex's design is based on App Note 67 from Linear. You cand find it here: ....... page  62.

That link is broken with the comma at the end of it by the look of it. Here it is:

http://cds.linear.com/docs/en/application-note/an67f.pdf

A great read.


Edited: I've fixed my link as well now! Sorry about that!

[bitseeker]

trys, for some reason your repaste also has a comma at the end of the actual link URL (not being shown). You can see it when hovering the mouse over.

[cat87]

That link is broken with the comma at the end of it by the look of it....

Sorry about that. It's fixed now.

[macboy]

I was also on the hunt for Victor's oscillator. I had just missed one on ebay, so set up a search, and had to wait over 6 months for another one to appear.  I got the 1 kHz model. I measure mine at <= 0.00008% (0.8 ppm) THD on my Panny VP-7722, but that is the measurement floor of that instrument, so it is not a meaningful measurement. The actual THD is lower. It's a nice little unit to have. Get one while you can; the superb National opamp he designed into it is now out of production (the fab was closed).

[trys]

I was given a price and availability of the oscillator by sending him a PM. The prices will depend on other factors, such as what country you are in.