I have full set of boards and power transformer
Some information can be found in this thread: Low distortion audio range oscillator
For the specs visit: Measurement results
PM me for details
Some information can be found in this thread: Low distortion audio range oscillator
For the specs visit: Measurement results
PM me for details
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why this post didn't get any interesting? I clicked the measurement page, but it is no longer there.
It’s a very complex design and not everyone needs 10 Hz to 300 kHz oscillator. Measurement results could be of interest to you as they contain AP’s oscillator measurements for comparison. Page with all related documents and measurements:
https://www.nanovolt.ch/resources/oscillators/index.html
These days, for audio, there are cheap fixed frequency oscillators that reach -150 dBc distortion below 2 Vrms (Viktor’s and EOSC10KV4 by Frex) or DAC by IVX.
https://www.nanovolt.ch/resources/oscillators/index.html
These days, for audio, there are cheap fixed frequency oscillators that reach -150 dBc distortion below 2 Vrms (Viktor’s and EOSC10KV4 by Frex) or DAC by IVX.
this documentation is fire!!! WOW. It is a very complex design and measurement show significant improvement over my AP Generator. Has anyone ever built it successfully?
I think it would be easier to have a fixed frequency ultra low noise/distortion for special measurements. I have inquired info on the Viktor's post as it seems extremely good.
I think it would be easier to have a fixed frequency ultra low noise/distortion for special measurements. I have inquired info on the Viktor's post as it seems extremely good.
I have found very interesting the comparisons on the different type of resistors and Welwyn RC55Y resistors produces lowest distortion among metal films and even lower than metal foil Vishay S102!!
I believe these Welwyn, were also re-branded as the red PRP for "audio use". I wonder if they produce a surface mount version of these RC55Y that produces same results.