Sola Sound - Tonebender MkIII  [schematic]

Discussion regarding early stompbox technology: 1960-1975 Please keep discussion focused and contribute what info you have...
Over Drive
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Post by Over Drive »

Does anyone have a link to the 20mm pots used for a replica build? Much prefer a link to a source in North America. What is the length of the shaft? I do not think standard 24mm pots will work for these.

Thanks

ringworm
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Post by ringworm »

Omeg 20mm pots are what you want. Freely (OK cheaply) available in Maplins UK. Here's a German source http://www.musikding.de/Omeg-Pot-20mm Don't know a USA source. Shafts can be cut to suit.

sinner
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Post by sinner »

U can get them at Conrad UK. If I wont forget I will post my layout and transfer files later when I get back home

Its scaled for Omegs

tassosmavr
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Post by tassosmavr »

sinner wrote:U can get them at Conrad UK. If I wont forget I will post my layout and transfer files later when I get back home

Its scaled for Omegs
Please

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DrNomis
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my favorite amplifier

Self-Built Valve Amp Head :)

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Post by DrNomis »

I recently bought ten Tung Sol AC125 Transistors, might use three of them to make a Mk III Tonebender soon..... :thumbsup
Genius is not all about 99% perspiration, and 1% inspiration - sometimes the solution is staring you right in the face.-Frequencycentral.

Over Drive
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Post by Over Drive »

ringworm wrote:Omeg 20mm pots are what you want. Freely (OK cheaply) available in Maplins UK. Here's a German source http://www.musikding.de/Omeg-Pot-20mm Don't know a USA source. Shafts can be cut to suit.
Those will not work with sinner's layout. That requires the "reverse" right angle PCB mount terminals.

sinner
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Post by sinner »

U haven't seen my layout yet mate

They will fit and work as they should. I should be back home in 2 hours. I wont forget today

sinner
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Post by sinner »

Ok, these are quite old, I had newer one, with fatter tracks and pads, few ad-ons like jumpered output resistor, or added pads for 4th transistor wired as a diode, and generally more charming - but I can't find it, I have a mess on my hard drive

These are layouts for quite a few MK3 variants including units branded by subcontractors, and two knob fuzz sound

Have fun

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Post by sinner »

...and the transfer file

85mm/85mm square

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controller700
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Post by controller700 »

Amazing work sinner! Thank´s for sharing!! :thumbsup

ringworm
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Post by ringworm »

Over Drive wrote:Those will not work with sinner's layout. That requires the "reverse" right angle PCB mount terminals.
What Sinner says. You'll need to bend the pins back but that's easy. The only problem you might come across is the threaded part of the pot not being deep enough on a very thick enclosure or unusually thick PCB board, it can be tight but it'll work.

Awesome work on those layouts Sinner btw!

Over Drive
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Post by Over Drive »

sinner wrote:U haven't seen my layout yet mate

They will fit and work as they should. I should be back home in 2 hours. I wont forget today
Have you tried the pots in that link yet?

Over Drive
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Post by Over Drive »

ringworm wrote: The only problem you might come across is the threaded part of the pot not being deep enough on a very thick enclosure or unusually thick PCB board, it can be tight but it'll work.
This and the pins are not going to have a lot of length on them. Have you tried the pots yet?

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Post by ringworm »

Yes, I used them on a similar through-board layout I made of the CMI Fuzz Unit/Jumbo Tonebender.
See here https://www.freestompboxes.org/viewtopic.ph ... 0#p199788

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Post by ringworm »


GodSaveMetal
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Post by GodSaveMetal »

sinner wrote:Ok, these are quite old, I had newer one, with fatter tracks and pads, few ad-ons like jumpered output resistor, or added pads for 4th transistor wired as a diode, and generally more charming - but I can't find it, I have a mess on my hard drive

These are layouts for quite a few MK3 variants including units branded by subcontractors, and two knob fuzz sound

Have fun
GREAT sinner!!!! please what transistor I have to use in these LAYOUT??? will be BC108/BC109??? or what??

THANKS man!!!!!!!!!

sinner
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Post by sinner »

No mate. Your choice of PNP germaniums

Over Drive
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Post by Over Drive »

Great work, Sinner.Cheers!

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controller700
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Post by controller700 »

Great informations and great layouts in this place!! Thank´s a lot!

Here´s my latest one. Point to point MK IV. :horsey:

Full album:
https://s573.photobucket.com/user/contro ... 0Mark%20IV

Image
Image

sinner
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Post by sinner »

Where did u get that cute enclosure?

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