freestompboxes.org

Hi all,

Following Rocklander's fond memories of his younger age , I bought this unit for cheap.

Tough case, DC jacks and switch are identical to Boss' ones. Pots are Alps (japan). Electros are Rubycons. Good overall quality so far.

Traced it. 0.99:1 clone of the DS-1. Add one RC series network to ground after the IC, and change the output transistor emitter resistor to 10k and you're done. Transistor types vary too, but IC is identical.

Can't seem to get what the purpose of this extra RC network is for. The unit sounds rather harsh, with the tone knob being VERY tricky, but I only tried it with the Strat in the Fender HRD and not that loud with the kid in front (I mean REALLY) of the amp.

I did use the DS-1 schem as a template. Modding it to real DS-1 spec is easy and is definitely cheaper than those vintage japanese DS-1... Don't know if the transistor type matters that much.
Guts will follow.

Cheers,

Laurent

Here are the guts: Cheers!

The 1M at the Q7 side qoes to the FET. The 56k goes to Vcc. Other than that the way of drawing is awfully similar to the handdrawn stuff I did around '93-98

as example, this one:
http://experimentalistsanonymous.com/di ... 20CS-3.jpg

Dirk_Hendrik wrote:The 1M at the Q7 side qoes to the FET. The 56k goes to Vcc.

Correctomundo! Thanks for pointing it out. File updated...

Dirk_Hendrik wrote:the way of drawing is awfully similar to the handdrawn stuff

Pretty similar indeed! Though it's not intentional at all... I did try to get a clean DS-1 schem to mod with GIMP, but failed. I actually traced it using a white sheet of paper. Faster, yet cleaner.

Though awful to you (but I've seen awfully worse ), it does print right if needed and is actually readible on any screen. I'll try to make the next ones more modern, that would most certainly make your eye even more sharp!

Dirk_Hendrik wrote:I did around '93-98

Call it vintage darling... I was just a teenager back then!

Where did I say awful ? (other than when referring to the similarity);
The only reason for me to start using Schematic editors is because the schematic entry is so much faster. Make your scribbles on screen instead of a notepad and convert em into the final schem straight away.

Dirk_Hendrik wrote:Where did I say awful ?

Dirk_Hendrik wrote:The only reason for me to start using Schematic editors is because the schematic entry is so much faster. Make your scribbles on screen instead of a notepad and convert em into the final schem straight away.

[prepared to be flamed mode on]Thing is... I'm using a graphic software for schematics as well as for PCBs...[/prepared to be flamed mode off]



But I'll try some, having Kicad and Eagle already installed. And this is again because of your remarks on PCB errors and/or schematic errors which can somehow be detected by an appropriate program. Considering the errors I keep making with these, that's most certainly a way to improve...

[quote="lolbou"][prepared to be flamed mode on]Thing is... I'm using a graphic software for schematics as well as for PCBs...[/prepared to be flamed mode off]

Forget it being flamed. Yes, it's january and that Big Barbeque of your's is probably catching quite some rain instead of tender marinated meat but that doesn't mean you'll get your flames another way

I meant schematic editors contrary to handdrawn schems. Not graphic software. I still do a lot of stuff by hand when the circuit is too simple/straightforward to start up the computer. Usually when making some notes in a repair/mod where the problem is simple. I tend to resort to the schamatic editor when the circuit becomes complex. This way when I have drawn a circuit snippet that ends with, for example, coupling capacitor C19 on the PCB end continue somewhere else in the circuit drawing up another snippet that again ends up with C19 I get an error message that C19 already exists... which is where the 2 circuit parts come together. Same thing with logic gates. Every connection that is drawn in the editor is there to stay. Tracing in that perspective often means pulling the circuit blocks together and rearranging them to a readable drawing and filling in the last blanks.