Tuesday, September 19, 2023

JHS: Bender London 1973

I almost didn't post this one, as it's really really close to the Hot Silicon Fuzz - but I was curious after seeing the post on FSB and I haven't done a regular / still in production circuit for a while.

Despite Josh claiming that it's an approximation of his favourite seventies MKIII Tone Bender, it's roughly a silicon MKII up front, with a transistor acting as a buffer to separate it from the tone control.  The JHS switch changes some resistance to ground on the Attack pot and adds an additional path around the tone control to the volume pot.   Anyways, check out the FSB post for the schematic and you can see for yourself.

JHS BENDER LONDON 1973 - VERO LAYOUT

JHS TONE BENDER LONDON 1973 - VERO LAYOUT



3 comments:

  1. I saw the post of FSB and serendipitously found your blog. I love the Mictester and the BA Scarab so I was interested in trying this recipe too. It sounds like the circuits that inspired it. Couple corrections though. Q2 should be a 2n2222a, Tone 2 connects to switch lug 3 and the 100nf connected to the collector of Q4 should connect instead to the emitter of Q4. Curiosity satisfied. Thanks for the layout man.

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    1. Thanks - I messed that one up pretty well. Will repost with corrections.

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    2. Not really. Your skills are beyond mine. Appreciate your sharing. Thanks again.

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