Function f(x) Clusterfuzz

[Kinski]

Schematic at bottom of thread!

http://www.freestompboxes.org/viewtopic.php?f=7&t=27052

[Alex]

Schematic is probably correct but not verified yet.
If it works I'll put it on the main page.

[Kinski]

Damn that was fast! I'm out of town right now. Won't be able to build anything for at least a week. Amazing layout as always, Alex! This one was beyond my skills.

[velouriafx]

Alex, can you make a version with only two clipping modes? Because 1P5Ts are very hard to find in Brazil. I really like the demos of this and want to build with SPDT switch for clipping or offboard clipping with dpdt. Thanks

[Kinski]

Velouria, many rotary switches can be adjust to only switch a few positions. Set it for however many you need. In this case, 5.

[velouriafx]

I know, but any rotary is hard to find lol
I Only have one 3P4T ordered from Tayda, but i will use in Space Patrol. Tayda orders usually take around 90 days to get here being optimistic.

[Kinski]

Ah cool.

I might be completely wrong here, but it looks like you could easily use a toggle with the given layout. Using a SPDT, run the "SW 1-A" to the middle lug. Then the two outer lugs to either of the  SW 2 - 5 positions of your choice. You could also leave off any of the unused components.

[velouriafx]

Yes, I believe that this will really work

[Kinski]

Let us know if you verify it!

[nocentelli]

I like the LED > FET > 1N4148, you could do all three with an on-off-on

[velouriafx]

nocentelli: how? the middle pole of SPDT isnt SW A?

[nocentelli]

The middle lug should have the pair with the highest forward voltage (LEDs); When set to the 'off' position, the LED pair are engaged: When switched to either throw, the lower forward voltage of the FET+diode or Si diodes will conduct instead, effectively "bypassing" the LEDs. It would mean you couldn't have a "no clipping" option unless you add a second SPST switch to disconnect the clipping switch altogether.

[Hozy31]

Verified! Ended up with 680pf for C1, 1N5817 for D4 and 1N4001 for D3. Used a 2P6T and adjusted the washer to get five nodes. Sounds awesome. Thanks Alex and Nocentelli.

[Sphere80]

The schematic shows a 1k between the tone control and the last 100n?

[nocentelli]

Sphere80 wrote

The schematic shows a 1k between the tone control and the last 100n?

True, but will make little difference - your maximum treble will be imperceptibly brighter and no-one who can still hear will run it at max treble anyway. I suspect it was a deliberate omission to make a tidy layout.

[Sphere80]

Thank you. I just built it and it sounds great, both into a clean and driven amp.  

 The filter switch is so subtle, they eliminated it on their upcoming mini version.  I took out the 4n7 so it's now "nothing/22n". The hiss and noise aren't filtered out anymore, but in some settings, it's not a problem and the extra sizzle is welcome.