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He wrote: I was at Ralf's wife's house and I know this thing... Have fun with it! The finished pedals were all tuned by Ralf. I checked the "finished" ones from the box... without Ralf's tuning, none of them sounded like a Blue Line should. Ralf always did the final tuning, and only the ones...

Then i would try another BC550C. I had some messages with a guy who visited the widow of Ralf Reichen and saw the pedals in a big cardboard box. He checked those which looked ready, but said they all lacked ‚the final tuning by Ralf‘. Sounds a bit like sprinkling of magic fairy dust to me, but...

Markus for you info: i just recieved a pic from inside a original Blue Line. It looks like Hermida Audio Zendrive (PPCB) with 2 switches instead of Tone pot. So the Trannies could be 2N7000.

Robert does not have to see it in flesh. He needs some clear pics from every side (maybe you have to put it out of box) and answer of some questions concerning not clear parts and connections.

I wonder what the black cross meant. Maybe not working?

@Markus Kersius : The Blue Line Overdrive was the Pedal of Larry Carlton. Kinda Zendrive / Dumble pedal variant. You see it on Reverb for some hundred bucks. Seems a great idea to share it and maybe others with @Robert. This is a great way to preserve Ralfs heritage for the Future.

I have heard the name Tonehunter. This is an obituary. https://www.gitarrebass.de/allgemein/till-tone-ralf-reichen-ein-persoenlicher-nachruf/ and instagram

My band mate had the original pedal. I offered him to mod it, but he decided to sell it. The 3 settings go from 56 (middle) to 103 and 876 nF. We planned to change c7 to 10nF and c8 to 56nF. Best to use pin adapter on this spots and try different values.

The colour combo is rad.

Looks like a cap in series with the flow of the signal is too small and cuts off too much bass.

I am located in Europe, but Mouser.com seems a good source for nearly everything in electonics.

That means he's human. AI is very good at coding.

I decided to buy a breadboard to judge on mods. I found that most of the mods are less interesting for me. Like gain mods going too high or distort too much, but hardclipper mods were often quite useful. Can't speak of Klon mods. I had Klon Clone with two independent pots instead of the dual...

I popped a MP10A with hfe 28 into a Dragon Breath Boost. Worked!

My first thought with squealing complains is, has this circuit a charge pump? What charge pump and what happens with another IC and what happens without the IC in the circuit?

by zooming at the upper right of the last pic.

Your hard clipping diodes look completley shot. No wonder your original pcb sounds less compressed!

ST-9 (or any YATS) into informant

I looked for the Mk-168. The specs look quite promising for 25 bucks. Features: 2013 the latest version of the software, the function than the M8 version more. Microcontroller using 8MHz external crystal, a better measurement accuracy. Key resistance using a thousandth of a metal film...

My board is changing constantly, but i always have a tuner and a noisegate.