Author Topic: Boss CE-2 questions  (Read 282 times)

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griff10672

Boss CE-2 questions
« on: June 19, 2017, 04:13:01 PM »
Going to try to breadboard up one of these and am in the process of ordering parts ........

that round white thing I see in all the gut shots and I think is labeled as VR3 on a schematic I saw... that's a 10K trim pot ... no ???

I'm using Electrosmash's True Bypass Schematic .... unless someone knows of a better TB Schematic for it ...

any common substitution for the BC239BP's ????  I found some that match up real close specs wise on Tayda ... but want to make sure ...

any other common mistakes ... botches and screw ups I should look out for ???

Thanks in advance ............

Griff

thermionix

Re: Boss CE-2 questions
« Reply #1 on: June 19, 2017, 05:44:20 PM »
I haven't looked at Electrosmash's CE-2 schematic, but I've seen enough errors in their stuff that I would recommend finding another, or at least double-checking it against others.

bloxstompboxes

Re: Boss CE-2 questions
« Reply #2 on: June 19, 2017, 06:01:09 PM »
I would try the tonepad.com's schematic. I built it from their etch mask on the site and it works a treat.

Floor-mat at the front entrance to my former place of employment. Oh... the irony.

griff10672

Re: Boss CE-2 questions
« Reply #3 on: June 19, 2017, 06:24:50 PM »
I've matched it up against a few other schematics .... I don't think I've found two legible schematics that match ...

I'll check out Tonepad's ....

 thanks for the input guys ...

duck_arse

Re: Boss CE-2 questions
« Reply #4 on: June 20, 2017, 11:09:25 AM »
interesting. the BC239 datasheet from Motorola says they come as BC239 or BC239C, indicating unsorted or sorted for highest gain, whereas the BC237 comes a, b or c, and the BC238 comes b or c.

so use a high hFE, low noise. BC549 or BC549C, or 2N5089, like that. note your pinouts, tho.

+1 what therm said.
"You are a whelk" - Bradley Walsh
"Hello Steven, it's Clem Fandango - can you hear me?" - Clem Fandango

griff10672

Re: Boss CE-2 questions
« Reply #5 on: June 20, 2017, 11:14:29 AM »
Thanks duck_arse !!!!   much appreciated !!

Griff