Catalinbread Pareidolia Harmonic Mesmerizer  [traced]

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Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby craggles » 04 Jun 2016, 16:18

Hey guys sorry for the mega necro resurrection, but I built this today using the pcb v1.2 posted earlier in the thread.

Something is very wrong... it does pass a signal but it's very trebly (I already switched out c10 to pre-compensate but to no avail) and I can hear odd glitches. The rate is all bunched up at one end (almost to a stutter speed) and basically it's unusable.

Has anyone else tried the pcb?
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Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby Pruttelherrie » 04 Jun 2016, 20:13

craggles wrote:it does pass a signal but it's very trebly (I already switched out c10 to pre-compensate but to no avail)

Remove R12 and see if any bass-signal passes! From there, continue to debug.
and I can hear odd glitches.

Hm that's weird. I suppose you don't have access to a scope and a tonegenerator?
The rate is all bunched up at one end (almost to a stutter speed)

Yep, mine has that too. All the usable speeds are in a small region of the pot. Be sure to use a 1M C pot! But it might need more experimenting with the usable range/steepness.
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Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby eatyourguitar » 05 Jun 2016, 05:51

check for a dead FET. I noticed this can happen a lot from handling. I built it and it was fine but I did need to mess with a mod to get more depth.
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Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby craggles » 05 Jun 2016, 10:36

Ok I think I got it sorted.

Found a tiny bridge in my etch. Cut it, and now all is good. Confirmed working!

The range sounds pretty good but as yet I haven't soldered the volume pot on so it's kinda hard to tell how transparent it's gonna be when at unity volume.

Cheers :)
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Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby aishabag23 » 03 Apr 2017, 07:16

FWIW, I purchased a xr2206 chip from a USA seller on eBay (for way too much money). It could very well be just coincidental, but this circuit sounds waaaaaaay better with the pricey xr2206 chip when compared with the three I purchased from tayda.

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Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby Che_Guitarra » 12 Jan 2018, 23:24

Sorry to revive an old thread, but I joined the forum specifically to troubleshoot a problem with my Catalinbread PHM.

Hopefully there might be a person or two reading this that still has their CPHM. I appear to have an output problem (a lack of output, to be exact).

I'm wondering if you can push the output volume into boost territory? If so, i'm wondering at what (roughly) potentiometer position are you achieving signal unity engaged vs bypassed?
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Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby marshmellow » 13 Jan 2018, 17:01

The output volume should be well above unity gain if the pedal works correctly. Check the DC voltages on the JFETs first.

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Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby roseblood11 » 14 Jan 2018, 11:28

I remember that my pedal caused some distortion in the following pedal/amp, when the sweep was at the lower frequencies...
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