DSOTM of a Slightly Different Color

[Chuck]

Things happen when I am not properly supervised.  Case in point is this messed with DSOTM fuzz:

Some parts are missing, a couple are obviously wrong and there’s a big fat NPN Germanium transistor (2N1304) where one of the dainty BC109s should be – I said I was unsupervised.  I started by socketing all the components that are not standard DSOTM parts just in case this experiment didn’t work out – when I put it on my board and fired it up a few minutes ago I realized that was a waste of sockets. Changes from the build document C5, C7 and C8 aren’t used (just left empty, no jumpers), C1 is 47n, C2 is 47p, C3 is 2.2u, C4 is 3.3n, C9 is 47p, C11 is 220n, C13 is 1n, R6 is 56k, R7 is 10k, R10 and R11 are 5.1k, R12 is 75k, and R13 is 47r.  My cheap Chinese tester tells me the 1304 has an hfe around 58.  I also replaced the 2K trimmer with a B2K pot – a smarter person might use the trimmer or a more space friendly 9mm pot.  Sound wise at similar settings to my DSTOM built the right way it seems to lean heavily toward both overdrive and fuzz – turning the Body pot (labeled S for Sharp) down sharpens the tone somewhat.

Thanks,
Chuck

A lot of my experiments end up in the parts salvage bin, this one goes on my board right next to its properly constructed sibling.

[Barry]

Awesome to hear and see.

Thanks for sharing!

[Chuck]

Thank you.

My grin has yet to fade on this one.  With the Gain all the way down there is still a lot of Fuzz available and with the Gain up and Fuzz all the way down there is a good amount of fuzz/clipping.  The standard DSOTM acts similarly but the general tone is different – both in a good way.

Chuck

[Author]

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