Possible to bias jfet at gate?

Started by nsteen, September 28, 2014, 12:29:04 PM

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nsteen

I'm interested in building a simple boost using an mpf102 but would prefer to have no resistor between v+ and source as I would also like to connect the drain to the buffered output rather than make it true bypass.

Is this a silly thing to do? Admittedly I am a newbie so knowing stuff about how to determine the proper bias for a jfet is kind of beyond me. The idea was to make a one transistor boost using the mpf102 and a charge pump to run it at ~24v kind of like a SHO but with more of that echoplex tonality/vibe.

Thanks in advance for any and all help.

smallbearelec

Quote from: nsteen on September 28, 2014, 12:29:04 PM
I'm interested in building a simple boost using an mpf102....The idea was to make a one transistor boost using the mpf102 and a charge pump to run it at ~24v kind of like a SHO but with more of that echoplex tonality/vibe.

Try some of the experiments in this article:

https://www.smallbearelec.com/HowTos/BreadboardBareAss/BreadboardBareAss.htm

You'll learn how a JFET works and how to line one up for the gain you want. The principles apply as well at higher supply voltages.

nsteen

Thank you! I've been looking for instructional resources but I haven't been good at finding them.

Awesome sauce