Author Topic: Colorsound Organ Wah + Swell Transistors  (Read 117 times)

joepopp

Colorsound Organ Wah + Swell Transistors
« on: April 17, 2019, 11:10:23 AM »
The battery bonked into into one of the transistors on my Colorsound Wah + Swell and shorted it. I can't seem to find a replacement part number.

It's labeled "MBC 3498"
Any help most appreciated!


Kipper4

Re: Colorsound Organ Wah + Swell Transistors
« Reply #1 on: April 17, 2019, 01:24:15 PM »
Didn't Dino have a thread about this circuit.

I guess it depends what the transistor does in the circuit.
If we had a schematic and a pointer to which transistor you damaged it would be easier to comment. If'n I get chance I'll google it.

Good luck.
I ain't no muff builder boi.
Smoke me a Kipper. I'll be back for breakfast.

Grey Paper.
http://www.aronnelson.com/DIYFiles/up/

anotherjim

Re: Colorsound Organ Wah + Swell Transistors
« Reply #2 on: April 17, 2019, 01:44:01 PM »
It's a BC349B. I can't help more than that. There are probably many alternatives.
Mind you, in the pic, the leads look twisted together anyway. Take it out and test it? Battery gunk doesn't often short out the parts themselves but more likely to rot the wires off at the body or pcb.

"Designing with PLLs in production circuits is reserved to those with the courage of the thoroughly uninformed."
Nuts & Volts
"Turtles have the short legs, not for the walking."
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joepopp

Re: Colorsound Organ Wah + Swell Transistors
« Reply #3 on: April 17, 2019, 01:49:16 PM »
anotherjim:
DOH! My old eyes could not see it correctly.

Thanks for the tip!

A guy bought the pedal and it stopped working. I think the battery bashed the transistor and the legs touched together and it shorted.

Joe

bluebunny

Re: Colorsound Organ Wah + Swell Transistors
« Reply #4 on: Yesterday at 02:28:01 AM »
Untwist it.  Small mechanical shocks won't kill a transistor.
Ohm's Law - much like Coles Law, but with less cabbage...

joepopp

Re: Colorsound Organ Wah + Swell Transistors
« Reply #5 on: Yesterday at 08:29:02 AM »
I tried to untwist it. No Sound.

I am going to put in 2N3904 listed as a BC349B in this link
https://english.electronica-pt.com/components-cross-reference?ref=2N3904

Will report back!

bluebunny

Re: Colorsound Organ Wah + Swell Transistors
« Reply #6 on: Yesterday at 05:13:15 PM »
I am going to put in 2N3904 listed as a BC349B in this link

Bear in mind that the pinouts are different.  2N3904 is EBC.  BC349 is CBE.
Ohm's Law - much like Coles Law, but with less cabbage...