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Topics - Grazza

#1
Tech Help - Projects Page / Dual switch LED help
February 10, 2022, 07:21:28 PM
I have finally got round to boxing up a very old krankosaurus board. This is my first build, please excuse the mess. I decided to use these breakout boards and I don't think I understood enough to do so and they have given me grief.
The effect works both distortion and boost, but only the boost LED comes on when engaged. I have attached photos of the build below.
I feel like it has something to do with the fact that there is no 9v connected to the second breakout boards 9v(board) or DC in. I don't really know what I'm doing though. There is only one 9v wire off the effect PCB which goes to the breakout board on the left. The holes aren't big enough to put a second wire in the breakout board or the effect PCB. Should I be running a second wire from the DC jack 9v+ to the second breakout board. If so does it go to the DC in or the 9v in? Or am I on the wrong track completely?


#2
Tech Help - Projects Page / Firebomb resistor help
October 28, 2021, 01:44:26 AM
Hi all,

I'm soldering an old firebomb pcb and I noticed in the documents that R1 and R10 aren't listed in the BOM but they are on the layout diagram. They are also not listed on the schematic. I have put photos below.
I noticed that they are immediately after the input A and B, and when looking through the krankosaurus and kokbox schematics they have a 1M resistor immediately after the input. Would I be safe to assume that these resistors will be 1M too?



#3
Hi all,

I bought a few PCBs possibly in 2010 and have only just recently found them and have started to build them. One of them being a rangemaster. I've been through the archives for the build docs, but the build docs don't match the PCB that I have. Does anybody here know where I can find the original build docs? If I can get it to work I'll post a picture below.
Also while I'm on the topic, the capacitor hole spaces are quite large on this PCB, turns out years ago I bought some suitable axial electrolytics but never got the other caps. Would anyone have any suggestions on what to get?

#4
Hi all, I have just finished soldering the components to the board of my first build and I am ready to test the circuit. However, this board has 2 switches (distortion and boost) so 2 input and 2 output wires. This might be a stupid question, but do I just connect both inputs to each other to the jack and both outputs together with the jack for the purpose of testing?
#5
General Questions / Changing pot values
September 14, 2021, 02:44:10 AM
Hi,
Probably a really stupid question, but I'm really new to this. I'm sourcing components for my first few builds and I'm having trouble finding 9mm PCB mount pots in 5kc.
Of I can't find them, how would it affect the circuit of I were to use 10kc pots instead, or would it be less destructive to just use 5kb pots, which I think I have seen around. Also had trouble finding 20ka and 25ka in the 9mm alpha pots.
Another component question too, would a 2.2nf cap in place of a 2nf cap be very destructive, I haven't looked at the schem yet to see where it is in the circuit.
Cheers.