The "32 TB2" pedal...

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laurie
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The "32 TB2" pedal...

Post by laurie » Sun Apr 18, 2021 1:03 pm

Ah, yeah, g'day!

I've been talking to The_Doc about doing a one-off pedal for him. After the madness around the Boss TB-2w I mentioned in passing that I could probably build a version for a lot less than the prices floating around for the other options.

I have enough of the sorted Russian surplus MP16B transistors with close to the right gains to build one, so the "32 TB2" has been born.

The schematic will be based on this one: https://fuzzcentral.ssguitar.com/mkII.php
Last edited by laurie on Tue May 04, 2021 8:25 pm, edited 2 times in total.

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Re: The "32 TB2" pedal...

Post by laurie » Sun Apr 18, 2021 2:01 pm

Schematic:
.
32TB2 schem1.jpg
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sclitheroe
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Re: The "32 TB2" pedal...

Post by sclitheroe » Sun Apr 18, 2021 2:08 pm

Super interested in this as well - I was looking at TB circuit diagrams after the TB-2w fiasco, as well as seeing what was on the market and reasonably priced.

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Re: The "32 TB2" pedal...

Post by laurie » Sun Apr 18, 2021 2:56 pm

I was going to do it on vero/perf board. But it got really messy.

So I laid out another PCB. The transistors will be socketed so you can try different ones.
.
32TB2 layout1.jpg
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Last edited by laurie on Mon Apr 19, 2021 12:53 am, edited 1 time in total.

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Re: The "32 TB2" pedal...

Post by laurie » Sun Apr 18, 2021 3:09 pm

sclitheroe wrote:
Sun Apr 18, 2021 2:08 pm
Super interested in this as well - I was looking at TB circuit diagrams after the TB-2w fiasco, as well as seeing what was on the market and reasonably priced.
I can do a few of these... The problem is the un-obtainum transistors.

They use 2 x gain of 70 and 1 x gain of 100. I have the gain of 70 no problem. The transistors with gain of 100 are rocking-horse-poo. Of the 1,000 transistors I tested, there are less than 10 transistors with gains "around 100" (not exactly, but somewhere between 90 and 110) so I can make maybe 8 full Ge versions of this pedal. And that's it.

You will see on the PCB I've allowed for a silicon Q3... so if I ever need to I can build a Ge/Si hybrid.
Last edited by laurie on Mon Apr 19, 2021 12:52 am, edited 3 times in total.

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Re: The "32 TB2" pedal...

Post by laurie » Sun Apr 18, 2021 3:29 pm

See below for better mock-up.

Colour will be "antique nickel metallic".
Last edited by laurie on Mon Apr 19, 2021 10:33 am, edited 6 times in total.

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Re: The "32 TB2" pedal...

Post by laurie » Sun Apr 18, 2021 4:06 pm

Hmmmm.... I just checked on SmallBear. They sell hand-picked sets of transistors for Tonebenders, and every single variation is out-of-stock.

Looks like lots of renewed interest in this type of pedal.

http://smallbear-electronics.mybigcomme ... d-similar/

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Re: The "32 TB2" pedal...

Post by laurie » Sun Apr 18, 2021 6:12 pm

If I can get 8 pre-orders for the 32 TB2 I can do it for the same price as the 32 OD (USD$95).

If fewer, no worries! The price will be a bit higher (probably USD $140).

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Re: The "32 TB2" pedal...

Post by sclitheroe » Mon Apr 19, 2021 2:51 am

laurie wrote:
Sun Apr 18, 2021 6:12 pm
If I can get 8 pre-orders for the 32 TB2 I can do it for the same price as the 32 OD (USD$95).

If fewer, no worries! The price will be a bit higher (probably USD $140).
Chickenheads and Ge...I'm in

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Re: The "32 TB2" pedal...

Post by Boogieman » Mon Apr 19, 2021 6:36 am

laurie wrote:
Sun Apr 18, 2021 6:12 pm
If I can get 8 pre-orders for the 32 TB2 I can do it for the same price as the 32 OD (USD$95).

If fewer, no worries! The price will be a bit higher (probably USD $140).
TB2? Oh yeah!

One for me, please.

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