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wsalMember
Hey Ron
I replaced the 4047, and still nothing has changed! Is there anything more I can do, or do I chuck it in the bin?
Cheers
WillwsalMemberI replaced the LM358, and nothing has changed. I’m not sure I was checking correctly with the multimeter though – I put the black lead on the pedal case, and the red on the output pin – is this correct? If so, I was getting a reading of around 1.36v and it moves back and forth from there to 1.37v, but I wasn’t convinced that this was the ‘pulse’ you were talking about because it wasn’t moving at a particularly steady speed, and changing the rate knob made no difference to the speed…
Anyway, with that in mind, do you have any more suggestions on what to check next?
Cheers
WillwsalMemberAlright, I checked the above, and there’s no moving voltage on the LM358, so it looks like that needs replacing?
So, there’s a heap of them on ebay, yet some of them have extra letters added onto the name: LM358N, LM358DT, LM358DR – is there a particular type that I should look for/avoid?
Cheers
WillwsalMemberAdditionally, I just checked the above IC number/codes on ebay, and they’re both very cheap. Is this a component that you can get away with buying cheap, or are there better “music grade” specialty ones available?
wsalMemberHmmm, I’m starting to feel a little like this is outta my league, but I’m keen to give it a shot. In more basic terms, how do I check the pulse? It it just a matter of putting a multimeter across 2 terminals?
Thanks for all the help so far!wsalMemberAh okay. So how would I go about testing if that is the case, and if one of those components is to blame, are they easily replaced?
Thanks again!
WillwsalMemberHey EH Man, thanks for the reply
I adjusted the trim pot in both directions and while it certain points at both extremes, the effect seemed to cut out entirely, nothing got the modulation going again…
Cheers
Will -
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