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Jfet BOZ - diyAudio
https://www.diyaudio.com/community/threads/jfet-boz.103050/
I attach here the nice BOZ schematic. It is a good starting point for true Nelson type of preamp. Wuth maybe a few small adjustments, depending of: - input voltage level. - wanted output level. - source impedance. - load impedance. In attached image, we can see that suggested Voltage supply is 35 Volt.
Jfet BOZ | Page 49 - diyAudio
https://www.diyaudio.com/community/threads/jfet-boz.103050/page-49
If you've read all the posts in this thread, you might have seen some posters here raised the source resistor from 10 ohm to 22 ohm and used 16V instead of 35V for power supply. You may want to try that. You're right I have not read all the posts. I …
Jfet BOZ | Page 71 | diyAudio
https://www.diyaudio.com/community/threads/jfet-boz.103050/page-71
Jfet drain will be at about 24V - (7.1mA * 1k8) ~ 11.2V (for 24V supply , 7.1mA bias and 1k8 drain resistor), close enough. Use another 1k8 resistor to ground after output coupling cap. Use 100 ohm from coupling cap to output terminal as …
Jfet BOZ | Page 65 | diyAudio
https://www.diyaudio.com/community/threads/jfet-boz.103050/page-65
J310 Jboz Hey all, I just put together a version of the attached circuit (thanks for the schematic and values juma!). I deliberately picked j310's with a 35mA Idss (to match juma's original build) and I've found that the node between the drain resistor and the jfet is sitting at about 20V when run off a 24V supply.
Jfet BOZ | Page 2 - diyAudio
https://www.diyaudio.com/community/threads/jfet-boz.103050/page-2
.model 2sj74GR PJF(Beta=20m Rs=7.748 Rd=7.748 Betatce=-.5 Lambda=4.464m + Vto=-.5428 Vtotc=-2.5m Cgd=85.67p M=.3246 Pb=.3905 Fc=.5 + Cgs=78.27p Isr=129.8p Nr=2 Is=12.98p N=1 Xti=3 Alpha=10u Vk=100
DIY Audio Projects Forum • JFET BoZ (Bride of Zen by ...
https://diyaudioprojects.com/Forum/viewtopic.php?t=2740&start=40
DIY Audio Photo Gallery DIY Audio Blog NEW Matt presents bias and operation data for the 6V6 tube in SE operation - 6V6 Single-Ended (SE) Ultra Linear (UL) Bias Optimization.
DIY Audio Projects Forum • JFET BoZ (Bride of Zen by ...
https://diyaudioprojects.com/Forum/viewtopic.php?t=2740&start=30
OK guys read and weep. Here it is: Mongrel Dog Audio capless SE Boz. That's right a Secpial Edition!! My new Oppo BDP-83SE has input caps but my 6AS7 SET has no input caps. So make a preamp with no input caps but good output caps. In this capless SE version of BoZ I have no input caps but retained the 10uf polypropelene caps for the output.
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