So much tech. What ever came of the love of the colour brown? Just can’t resist it! 
sine is not perfect, but parts aren’t matched so maybe OK?
does this look right, friends?
regards,
Andy
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I misread. Recalculations show 0.09%. Might that be correct? Will spend some more time on this
I have read up a bit, printed the manual. The copyright on this thing is from 1966! Impressive, old stuff working like a charm.
the manual says that a 0.4 reading on the 1 percent scale, means 0.4 percent distortion. If read correctly (on the correct lines and dots), my WLS shows .35 on the .3 percent scale. That would be 0.105% distortion.
have adjusted the meter, and will redo step by step following the manual 🙂
once I dial this in, I will measure both the ACP+ and J Zen 🙂
Regards,
Andy
the manual says that a 0.4 reading on the 1 percent scale, means 0.4 percent distortion. If read correctly (on the correct lines and dots), my WLS shows .35 on the .3 percent scale. That would be 0.105% distortion.
have adjusted the meter, and will redo step by step following the manual 🙂
once I dial this in, I will measure both the ACP+ and J Zen 🙂
Regards,
Andy
As planned I got to remeasuring today, with a cleaner sine too, following manual.
end result is 0.081% distortion. Very happy with that. Single ended, 7db gain.
reconfirming neg phase 2hd, affirms my suspicions as to why it sounds so good with my Aleph J Zen. The J was measured to redicilously low levels of distortion @ 1 watt output today, approx 0.15 percent. Neg phase that too 🙂 But need to redo those measurements.
btw, preamp noise under 300uV measured at the outputs. Completely independent of shorting input or not. And a noise environment for the probes. Very nice 🙂
thank you, Wayne!
regards,
Andy
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In fact, I read in the manual now, the 334A measures down to 0.1%. And today, measuring the WLS, I ran out of range on the sensitivity scale. Meaning distortion is probably even lower.
so is my equipment bad, or the WLS and J just too damn good?
I'm pretty much 
for all these measurements things, but - why don't you try with decent sound card, for comparison sake?
I mean - if generally setting THD Spectra is main goal, your'e good to go, but if you want proper THD measurements, you need better gadgets
for all these measurements things, but - why don't you try with decent sound card, for comparison sake?I mean - if generally setting THD Spectra is main goal, your'e good to go, but if you want proper THD measurements, you need better gadgets
Boyz are referring to Focusrite 2i2 as good one for job
I have one, but still (lazy) grinding with my old and trusty EMU1212
I have one, but still (lazy) grinding with my old and trusty EMU1212
Never got confirmation that the Focusrite solution enables visualization of the residual waveform?
don’t own a PC, so this was an easy and cheap solution for me to achieve initial goal: adjusting the BA-3 FE.
anyways, soundcards are for sissies. Real men use Audio Analyzer
will check out the Focusrite some more. Maybe sell the 334 on ebay. They can fetch good money.
The Focusrite is a USB DAC/ADC interface. For measurement use you will need a computer and software; REW and ARTA are popular.
I think some members have used Diana (https://www.diyaudio.com/community/threads/diana-a-software-distortion-analyzer.315785/) for residual distortion visualization.
I think some members have used Diana (https://www.diyaudio.com/community/threads/diana-a-software-distortion-analyzer.315785/) for residual distortion visualization.
Do you measure/review waveforms these days? Have a preference? Seem to remember you have/had a trusty 339A.
regards,
Andy
