Lemonade OD - add treble and pre-gain?

[Darrencp]

Hey dudes!

On the latest version of the lemon drop (now the 7 series overdrive) the official site says its added 2 new pots (pre-gain and treble) but it's the same circuit.

Possible to add these to the current Lemonade OD board?

Cheers
D

 

[jesuscrisp]

If I was to guess what either pot does, I'd say make R6 a C1K pot and R9 a B10K or C10K one. R6 controls the gain of the first transistor, R9 together with C10 forms a lowpass filter.

 

[Feral Feline]

Another "pre-gain" possibility, without looking at the schematic, is it's simply a pot chucked onto the very front of the circuit to tame/limit the signal going into the circuit.

 

[MobyOctopad]

@PedalPCB, been meaning to ask, but any chance of a new batch of the Lemonade (and MOSFET Driver) sometime soon? Cheers!

 

[Robert]

@PedalPCB, been meaning to ask, but any chance of a new batch of the Lemonade (and MOSFET Driver) sometime soon? Cheers!

Several of the older PCBs are getting a refresh, I just finished up the Lemonade so it should be here in about two weeks. MOSFET Driver might take a little longer.

 

[MobyOctopad]

Several of the older PCBs are getting a refresh, I just finished up the Lemonade so it should be here in about two weeks. MOSFET Driver might take a little longer.

That's awesome, thanks so much!

 

[krupdb8]

@PedalPCB Looks like I received one of the new Lemonade Overdrive PCBs, but I don't see a build doc for the update. Will that be available soon?
Thanks-- Ken

 

[Robert]

The only difference is component placement.

The schematic, parts list, and drill template are all the same as the previous version of the doc.

 

[krupdb8]

Oh, nice! Thanks, I should have looked a little closer.

 

[HamishR]

I can't remember where I got the info but as far as the pregain is concerned it is replacing the 1K to ground from the emitter of the BC108 with a 100R resistor going to pin 3 of a B2K pot. Pin 2 goes to a 4µ7 cap which goes to ground and pin 1 goes to ground.

 

[music6000]

I can't remember where I got the info but as far as the pregain is concerned it is replacing the 1K to ground from the emitter of the BC108 with a 100R resistor going to pin 3 of a B2K pot. Pin 2 goes to a 4µ7 cap which goes to ground and pin 1 goes to ground.

View attachment 29882

Finally a Lemon Drop layout with the correct 3 - 4u7 electrolytic's in place!!!!

Here is his latest version:

7 Series Overdrive

Originally dubbed the Lemon Drop, the 7 Series Overdrive is a simple and effective “fuzzy overdrive” designed to capture the sounds of the Vox 4 and 7 Series amplifiers. Used by Revolver era Beatles and Page on the second Zep album, these were hybrid amps with a solid state preamp and tube...

www.lumpystoneshop.com

 

[Lorok]

Too bad there still isn't a 5-knob schematic available.

Does powering these types of pedals from 18v require rebiasing of the BC108 and 2N5457?