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May 22, 2023 at 6:08 am #28699mybudModerator
Wow. Just wow.
May 22, 2023 at 6:07 am #28698mybudModeratorOut of the park, Chris. And ‘phirst’ is tops. Inspiring stuff.
May 22, 2023 at 6:04 am #28697mybudModeratorGreat build, diggin’ the humorous graphic.
May 22, 2023 at 6:02 am #28696mybudModeratorThanks, Chris, appreciate your kind comments. Best of luck with your plan.
May 14, 2023 at 4:21 pm #28617mybudModeratorMany moons ago I transcribed Robbie Krieger’s solo note for note for an album I recorded which included some of covers of some of my favourite songs. Not for commercial release.
It’s a great song and proof of Krieger’s musicianship in a simple but well-crafted solo. TMM the Doors’ songwriting abilities are mostly overshadowed by the controversy and mythology around Morrison and they are as under-rated as Jack Bruce and Pete Brown. My 2c worth. Thanks again and stay well.
May 14, 2023 at 7:07 am #28608mybudModeratorBeautiful, CC. The name says it all…
The first chord progression is based on ‘You’re lost little girl’ if I’m not mistaken? Feel free to correct me if not 🙂
Great stuff.
May 9, 2023 at 7:03 am #28554mybudModeratorLooking good.
May 9, 2023 at 7:02 am #28553mybudModeratorClearly three will sound three times better. *Wink*
May 4, 2023 at 11:03 am #28490mybudModeratorGreetings Wayne. This is not a circuit I’ve built myself and your interpretation appears right regarding the pot value in question. My suggestion is first that the circuit is correct as it stands because the brains trust here tests them before they go for release. Perhaps try breadboarding it to see (hear) what’s going on. Sorry I can’t offer you a better explanation but I regularly breadboard circuits to see whether or not they’re appropriate for my setup.
April 19, 2023 at 11:34 am #28357mybudModeratorDifficult to tell from the pic but it seems you might have mixed up the value of R6. Looks to me like R6 is 3300 (3k3) when it should be 330k (330000). But don’t take my word for it necessarily and double-check this and verify.
I suspect that this might cause the circuit not to function as it should. If you still don’t get sound after swapping this (given I’m correct here), then the problem lies elsewhere and we’ll deal with it accordingly. Looks like your offboard wiring (jacks to switch, etc.) is correct as borne out by the LED functioning as it’s meant to.
For future reference, try to orient the resistors consistently (with tolerance band to bottom or left as the case may be). Do the same for the caps. Makes troubleshooting much simpler.
April 16, 2023 at 7:26 am #28328mybudModeratorYou’re very welcome. The suggestion regarding R32 was clearly a senior moment on my part, apologies.
I’d try the following steps:
- Double-check all component values in case there’s an incorrect cap or resistor value that’s crept in somehow
- If all of these check out, try gently cleaning the solder side with isopropyl alcohol. As far as I can see, the joints look good (no dry joints or other issues), but it doesn’t hurt to give it a good clean in any case
- Try bypassing the footswitch and connecting your ins and outs direct to the board (use alligator clips). If that works, then you’ve eliminated the footswitch as a possible problem. Not common, but possible
- Finally, if you’ve eliminated all these possibilities, try slowly adjusting the trimmer. In my experience, there’s a quite narrow band within which you get the most phasing with least distortion.
Listening to the audio, that kind of weird ring modulation sounds like the trimmer’s off somehow, but I’m baffled as to how it can sound the same without the transistors in place. Make yourself an audio probe and work stepwise through the audio path till the problem reveals itself. Let us know if there’s progress.
April 14, 2023 at 6:17 am #28302mybudModeratorSure, @Bruce R, understood and noted. I also have an older revision of the board which may have complicated things, but note that this aspect hasn’t changed in the new revision: the need for connecting both ground pads. Can’t see from the pic whether or not this is in place.
April 11, 2023 at 11:55 am #28267mybudModeratorHi @sofnwhat: They are 5457s, so the pinout should be reversed from 5952s, I believe.
April 11, 2023 at 9:01 am #28262mybudModeratorAn afterthought. Check this link:https://guitarpcb.com/wp-content/uploads/2021/09/The-Vibe-v4-2021.pdf and verify that you have the affected diode the right way round.
Good luck. Let us know how things go.
April 11, 2023 at 8:58 am #28261mybudModeratorWelcome Fabio!
A couple of things to check. I assume that:
- your 5457s are a matched set
- each of them is sitting correctly in the sockets (try gently moving them in testing)
- you’ve connected both grounds (if not, the pedal won’t function correctly).
It’s also worth connecting R32 or at least bridging it if you’ve made other wiring arrangements. I suggest you try each of these in order and see if one change at a time makes a difference.
March 26, 2023 at 12:08 pm #28082mybudModeratorClass.
March 24, 2023 at 9:41 am #28065mybudModeratorThere’s info on this over (LM308 can to 8pin dip socket) at Beavis Audio.
Look for 4 knob Ratt.
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