Just try to slap a large cap in series with your input jack. Stick a 100nF or more non electro cap in series (ie breaking the connection from input jack tip to the circuit), your problem should go away.
After that, you can play with cap values but anything above 33nF should work perfect.

I have one and its excellent. Bogner really hit one out of the park with these pedals. The build quality is excellent and the tones are top notch. So, how rich are you? Not particularly. $300 pedals abound on this planet. Most of them have 20 parts and a stupid paint job. The Bogner pedals have mor...

OK so we have 2 dual opamps and most likely 5 JFets.
Maybe an active tone control with one the the two dual opamps??

this is puzzling..soldano was copied his amps buy the rest of high gainers...like dr. boogie... maybe the circuit was like rectifier but using fets ?and same control as rectifier ? It's true that the peavey 5150, Soldano SLO and rectifier share the same preamp lead circuit. Cleans, crunch, switchin...

Thanks jaser, I like the 567, it's quite produce ring modulation but it's a very easy way to get nasty square waves and I find it's easy to tune for octave up/down type effects too!

Sad, this is just a tube screamer with very few changes, like the low pass filter after the first gain stage and asym clipping. Actually prior to going to MXR, Zakk used a BOSS SD-1 which is another tube screamer clone, like this one, the main difference with a TS-9 is asymetrical clipping with diod...

Not sure if active counts but the best mods I've done and actually do on all my guitar is either a fetzver valve from ROG http://www.runoffgroove.com/fetzervalve.html (An always on second harmonic boost, not much of a volume boost, maybe 20-30% more volume) or replacing a tone control with an onboar...

Email sent

OK, I am back so I tried 2 circuits: transistor with diode and transistor with collector less second transistor. 100K trimpot between cathode / emitters. Transistors are 2N3904 and the diodes are 1N4148 and 1N34A germanium. A simple booster, 10K collector and 1K emitter resistor, 220n input cap, 470...

Thanks grrrunge and DrNomis, I love this site :) It sounds like adding the resistor between diode cathode and transistor emitter might be close to emulating the internal rbe in the transistor. What a bipolar transistor base-emitter junction does that a diode junction does not is to have an equivalen...

Great thread, I was wondering, couldn't the second transistor with collector removed just be replaced by a simple diode? I made a quick schematic for it: 1. Take two identical random silicon transistors (for more mojo: your fav fuzz silicons 2. Tie the BASES together, 3. Cut off one COLLECTOR 4. con...

Guys, thanks very much for tracing this pedal.
I took the liberty of tweaking the schematic layout to make it a bit easier to follow (in my point of view). The tone stack for example looks much more standard this way.

Hope this is useful!

Giorgio

Looks like the diodes are there simply as a noise gate?
I used diodes that way in the past, It works great as a noise gate but I think it creates too much harsh harmonics and it's always impossible to get a clean sound out of it, maybe that's wanted in this case

OK, I'll start, what are the tubes? And where's the power supply

Nice thick sound, congrats!

Thanks to all, this is great. I am going to try finding a matching diode for the good old 2N5457, it would make think much easier

Thanks @Stephanovitch, looks great, do you have the missing parts (looks like the cab sim is missing)?

Here's the google translate, have fun: Greetings to everyone he did not want to write Turkish Teşürler no one understands the way into the hands of everyone I have tanıtmadım health priority shares on this site I have a very nice, very few people practicing in Turkey can not exchange information wit...

@merlinb summed up his incredible knowledge in this book: http://www.amazon.com/Designing-Tube-Preamps-Guitar-Bass/dp/0956154506/ref=sr_1_1?ie=UTF8&qid=1328540471&sr=8-1 Highly recommended if you need to calculate input/output Z and other stuff! Also very well written I must say, a lost art :)

thx for reply yes i have 2 different power supplies one is rated at .65 amps and other at 1.5a. i get same results from both. I dont know anything about tubes. When i disconnect the heaters from circuit then power supply will adjust well over 200v but connected i have problems drops to 150vmax. tod...

Cub wrote:Great project ! That must have taken some time. I'll be sure to keep an eye on this thread.
I really like the rock clip, it has a very nice and distinguished British accent.

Thanks Cub, that one isn't boosted with a pedal, it's the raw preamp sound.