Jeff, these are very good ones. Clean clipping, precise 1KHz square, nicely rounded corners at 50KHz. Exactly as expected. X4-jfet does a great job driving the monster. X4 are the great front-ends, somewhat underappreciated by the community, I think 😀
Very very interesting output results!
Mono blocks is the way to go for sure and it also looks really nice this way, beside each speakers...! 🙂
Do
Mono blocks is the way to go for sure and it also looks really nice this way, beside each speakers...! 🙂
Do
This is not a criticism but a question? Why stick with BJT on the output as opposed to Jfet or Mosfet? Still learning... Cheers
X4-jfet front-end uses 2 pairs of complementary jfets 2sk246/j103 at the input.
Those are still available in some locations. We also have some stock for the kits.
Power jfets are not available these days. MOSFETs - ok, a separate story, we have some good OPS configurations, using them.
However, NS OPS's non-switching mechanism requires a rather precise tuning, based on Vbe (p-n junction voltage drop), inherent in bjt output devices. The non-switching mechanism also requires a rather accurate temperature compensation, designed and fine-tuned for bjt outputs in our case.
So - why not? 🙂 RET-technology bjts are very good output devices.
So far I understand, the NS-circuit is used to reduce crossover distortion. Did you make measurements to compare behavior with NS and without NS in the same circuit?
Is there any benefit for THD mesurement if NS is used?
No reflow station used, just hand soldering using 0.5mm solder wire.😉
Cheap solutions here... only. 🙂
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Please Jeff can you confirm value for R17, R19?
Are these 100R?
I see 100 on schematic when other marked as 100R. 😕
Are these 100R?
I see 100 on schematic when other marked as 100R. 😕
