Tonebender MKII vero layout with on-board trimmer?

Started by mordechai, February 03, 2019, 02:43:59 PM

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mordechai

I've been scouring the various resources for vero layouts of a TB MKII that incorporates a 100K trimmer to dial in the bias of Q2, and not finding anything out there.  Can anybody here point me to a layout that has this feature?  I've hacked in a trimpot on an earlier version that manages to allow me to do this, but it looks terrible and is not very secure, so I'd like to be able to build one where the trimpot is firmly and cleanly part of the layout.  Appreciate any help here, thanks!

ManicStrat1982

#1
I've been looking for the same thing. I can't believe all the talk out there about using trimmers, and there isn't a layout with them. I'm not that great at doing layouts, but I'm going to try and make my own. I'll make it, test it, and post it if it works. I'll update in a couple days.  :icon_mrgreen:

iainpunk

that's because there is huge variation in trimmer footprints. anything from 3 in a row with each with one space apart, to smd, to ''triangle layout'' and everything in between.
i don't think that vero layouts are flexible enough for this spread is footprints. pad-per-hole boards are way more flexible (and better in every way).

cheers, Iain
friendly reminder: all holes are positive and have negative weight, despite not being there.

cheers

Scruffie

Apparently I posted this 10 years and one day ago.



But C6 Should be 10nF not 100nF and there needs to be a track cut between Q1 & 2's collectors (F11).

iainpunk

Quote from: Scruffie on November 21, 2020, 12:31:13 PM
Apparently I posted this 10 years and one day ago.



But C6 Should be 10nF not 100nF and there needs to be a track cut between Q1 & 2's collectors (F11).
that's all fun and games until the trimmer your local electronics store stocks has another footprint.
it can be done, fitting another type of trimmer onto this, but OP's problem comes back in to play,
Quotebut it looks terrible and is not very secure,
i believe that putting it on an external control is the best option, it really opens up a whole range of tones which are otherwise trapped inside the enclosure.

cheers, Iain
friendly reminder: all holes are positive and have negative weight, despite not being there.

cheers