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Steve Daniels, Unijunction Tremolo, in: Electronics Hobbyist, Spring-Summer 1971 🇺🇸

Posted: 06 Oct 2022, 15:22
by modman
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Unijunction Tremolo 1971.pdf
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Re: Steve Daniels, Unijunction Tremolo, in: Electronics Hobbyist, Spring-Summer 1971

Posted: 07 Oct 2022, 13:53
by Dr Tony Balls
Wasnt the original Small Bear guy named Steve Daniels? Is it the same one?

Re: Steve Daniels, Unijunction Tremolo, in: Electronics Hobbyist, Spring-Summer 1971

Posted: 07 Oct 2022, 15:54
by lolbou
No ticking on this one for sure, although it may benefit from a buffer or two?
Could be interesting to remix it with the Vox Repeat Percussion?

Re: Steve Daniels, Unijunction Tremolo, in: Electronics Hobbyist, Spring-Summer 1971

Posted: 07 Oct 2022, 21:29
by cspar
Dr Tony Balls wrote: 07 Oct 2022, 13:53 Wasnt the original Small Bear guy named Steve Daniels? Is it the same one?
Yes, one in the same.

Re: Steve Daniels, Unijunction Tremolo, in: Electronics Hobbyist, Spring-Summer 1971

Posted: 10 Oct 2022, 14:02
by Dr Tony Balls
cspar wrote: 07 Oct 2022, 21:29
Dr Tony Balls wrote: 07 Oct 2022, 13:53 Wasnt the original Small Bear guy named Steve Daniels? Is it the same one?
Yes, one in the same.
Neat! Didnt know that.

Re: Steve Daniels, Unijunction Tremolo, in: Electronics Hobbyist, Spring-Summer 1971

Posted: 10 Oct 2022, 21:45
by modman
Dr Tony Balls wrote: 10 Oct 2022, 14:02
cspar wrote: 07 Oct 2022, 21:29
Dr Tony Balls wrote: 07 Oct 2022, 13:53 Wasnt the original Small Bear guy named Steve Daniels? Is it the same one?
Yes, one in the same.
Neat! Didnt know that.
I didn't know it either before I started out this diy pedal article collection. All these schematics and updates are available from http://diy.smallbearelec.com/index.html .
Seeing how long Steve has been in the diy pedal game (50+ years), I again realize that it would be great to have his story on video.

Re: Steve Daniels, Unijunction Tremolo, in: Electronics Hobbyist, Spring-Summer 1971

Posted: 11 Oct 2022, 17:52
by ppluis0
Hi folks,

As the 2N2160 can be difficult or expensive to find, there is an equivalent relaxation oscillator made up with a couple of garden variety transistors:

Image

Bear in mind that the values of R1 and C1 in the above image are to have 1 kHz and can be scaled to the frequency of this tremolo.

Cheers,
Jose