Silicon ToneBender on pot-mounted vero

DS13

Member
3x 2N2369 @ ~60, 80, 80 hfE. Biased to ~7.8, ~1.7, ~7.8. It is stupid loud. Unity is around 9:30.

This is in a 1590B. I have since reworked the layout so it can be dropped into a 1590B or with pots flipped, into a 125B - along with a few other tweaks. You can see the pot pins on the bottom row.

I left out the optional 10nF cap on input. I am going to clip it across the input jack to see if it tames a little sizzle. If not I may try some small BC caps.

Tonebender2.jpg

I still have much work to do on my wiring. Enclosure is lightly hand polished up to ~1000g. And of course I scarred the clearcoat tightening the footswitch:

Tonebender1.jpg
 
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Well done!
It is stupid loud. Unity is around 9:30.
2367/8/9s have a way of doing that.
Way higher output than others
I think they're a relare exception where their hfe(small signal gain) is way higher than their hFE(DC current gain). IIRC, they were designed as audio output transistors so likely designed to optimize higher hfe.
Onw or my favorites. More hifi, tighter bass.
They were used in the (v5?v6?) Nashville Bosstones made by ShoBud and those Bosstones were always thought to be more hifi.
Some of my favorite fuzz transistors.
 
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