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Yep, I see. The original had six UA741CP's in it. The clone has three TL072's...single v. dual Op Amp. I see the Slew Rate for the YA741 is only .5V/us and the TL072 is 20V/us!! I wonder what the difference is in TONE?!??

Hey guys, I know it's expensive, but think I'm going to pull the trigger on the Peak DCA75. I think it's really cool and will supplement by 3 other Peak/Atlas units. Second thing thou....WHY does the '74 Phase 90 Reissue (as the vintage ones) have 6 ICs and 5 Transistors, but the Pedal PCB...

Ok, thanks. I'll wire it up for True Bypass and see how it sounds. OCD pedals have been around for a while. I haven't used one, so anxious to see how it sounds and stack up against other ODs. Usually, your boards only have 4 pads and the IN and OUT come off of the jacks themselves. That's why...

So, I don't have that other daughter board, so I would just use the 4 pads (IN/GND/SW/OUT)?? The v.2 has 7 pads to hook up to the 3DPT. So, you're saying use all 6 pads at the bottom for True Bypass and just ignore the EB?? If so, I'm not sure of the wiring for 6 pads! Can you please...

I have the latest board - ADHD Overdrive Any idea when the build doc will be released or is there a preliminary I can use? Need the drill template and understand how to wire up with the additional pads and others for "EB"?!?? Just waiting this stuff so I can finish up building. Thanks in advance.

Ok guys. I finally had the time to delve into this...and I have a solution!! The problem was not the switch...it was not the use of a tube amp...it was what I was thinking and had to do with the True Bypass scheme!! Attached is an illustration I put together. The first one is the normal way...

Yeah, not the case here. I'm running the pedal directly into a solid state Marshall amp!

I looked at the board today. I reviewed the solder joints and found a couple not to my liking, so took care of them and reflowed the entire board. I really don't like that trimmer, soo going to wait until I get the new Bourns-type from Tayda, then see if any change. If not, I'll try changing...

Aww...Mammoth. Miss them. Great company and used to use them all the time. Shame they went under. Well, I see you used Tantalum up on top and a Bourns trimmer! I dont see much of a difference in the True Bypass or grounds. I'll check on "popping" when I turn the switches when I get a...

Thanks guys. I'm reading and listening. Doesn't sound like it should be popping! So, I'll have to dig in. I don't want any issues with any of my builds, so use all virgin NEW components, previously Mouser, I now use Tayda exclusively unless I have a hard time getting a part and have to go...

Here is a pic of the PedalPCB XD Phase build as well as link to the video comparing the original MXR pedal to the PedalPCB. Sounds amazing and there is pop in the MXR. PedalPCB unit is popping thru the speaker when active, no pop when disengaging. Video - MXR Phase 90 to Pedal PCB Comparison

How is it not True Bypass when it was originally hooked up, again, like the SPDT bypass I posted above with pictures showing the footswitch and the 3 wires going to it, just like the "Simple SPDT" illustration, no relay or transistor switch, etc.?!?? I have FIVE Phasers on the bench as I said...

Thanks for the link! Only problem is...it appears the original MXR CSP026 '74 Vintage Phase 90 seems to be a true bypass of a sort and doesn't "Pop"!! I'm attaching the original schematic from ElectroSmash. It doesn't show the switching, but shows the different section of the pedal and I do...

So you're using the Atlas DCA75 - Atlas DCA75 Meter Yeah, I have 3 or 4 of the Atlas meters and love them. I don't have the DCA75. It looks like there is an "Improved JFET Matcher" which measures Vp Idss and Vgs out there originally from RG Keen - Greatly Improved JFET Matcher This will help...

I just finalized an XC Phase pedal. I have one question and one issue. The thing is functioning appropriately and engaging/disengaging. The issue I have is that there is a loud audible "POP" when engaged (not when disengaging)! I have an actual MXR CSP026 74 Vintage MXR Phase 90 I purchased...

Haven't used my pedal since I build it as tied up with other thing, but circled back around and yeah, noticed it "ticks"! I notice it when DISengaged rather than engaged!! I'll see if moving the wires does anything, but know I my wires are routed to the outside away from the board, so...

Looks like low-B has a frequency of 61.7Hz, so need to ensure frequency down to at least that (or lower). What is the current design tuned to and how to calculate that??

Ok, so played it thru Bass over the weekend and with some other area Bass Players to demo. The Danae pedal is killer! Sounded EXCELLENT on Bass for those interested in the feedback from me and people. One question or ask is that the frequency response be extended down to the low-B for the...

I know sounds like a stupid question, but has anyone confirmed the Engineers Thumb build?? I built one up. Seems to work and all controls, but active LED is either ON....or ON brighter/darker!! Just so I know when on or off, just disconnected the 2 wires from the board, and wired hot directly to...

I know sounds like a stupid question, but has anyone confirmed the Engineers Thumb build?? I built one up. Seems to work and all controls, but active LED is either ON....or ON brighter/darker!! Just so I know when on or off, just disconnected the 2 wires from the board, and wired hot directly...