Show your pedal guts!

[PMowdes]

Mxr phase 90

[MAO]

Wampler '65 and '57 with mods, wired in parallel with independent buffers.

Special thanks to Strassercaster for hooking me up with '65 worthy j201s.

Hate to let this one go...

[Sensei Tim]

How do they sound in parallel vs series?

Looks great!

[OcularDawn]

That's a beast man ha ha. Btw do your J201's bias up easily to 4.5v without altering the bias resistors? Mine measure up all over the place  (probably fake). Stupidly sold my Black 65 assuming I could easily make another.

[MAO]

Thanks Sensei, looks really good in person. Have to see if I can get a better picture today, thinking I may sell a couple of these publicly. Hopefully it won't tick off Brian.

In parallel with the mono output, the signals seem to add rather than push one another. The stomp switches act like individual mute switches, with no clean signal passing when engaged. When both stomps are engaged, the pedal goes into a true bypass.

I found the settings that blended well together in mono, would never be used individually. For instance, I setup the '59 as I like it, then turned the bass all the way down, and on the '68 I turned the Mids and Treble all the way down and turned up it's Bass. I ended up with a warm Tweed top end with a tighter Blackface low end.

The gains have to be tweaked down a bit when using the mono out otherwise it can be to much.

Using the stereo out sends each pedal to a different amp, so far I have just set each side as I would normally and sounds great through the two amps.

I used the AMZ buffer/splitter to create the parallel feed.

Sorry so long, but I should mention adding the normal/bright/linked modes to the '65 is worth it, I particularly like the little boost you get with the linked mode. I also added the '57s output buffer to the '65 to isolate the outputs. This will also allow for a buffered bypass in this dual pedal rather than true bypass if desired. Might also be useful for blending the clean signal with either pedal.  
     

[MAO]

Hey Ocular,

Yeah, the SMDs are also all over the place. Out of the 250 I purchased from Mouser and Newark, not a single one came close with a 5k6 drain resistor. Most measured from 11k to 23k, with a couple at 27k.

Luckily Strassercaster parted with a few J201s that biased at 5k6.

Using the 2nd Greatly Improved Jfet matcher, I measured the Idss and Vp for those that biased just over 4.0v with 5k6 drain resistor. Voltage at the top of the drain resistors in the pedal was 9.03v

Supply voltage for Jfet matcher 9.06v
2.06  0.276
2.02  0.278
2.01  0.270
2.06  0.276

These 4 measured just over 4.5v in the pedal
1.76  0.223
1.77  0.220
1.84  0.229
1.76  0.223

I didn't have any of my J201 SMDs come close to those readings, but do have a few 2n5457s that are really close.

Going to try those 2n5457 in my next Blackface build to see if they sound similar.

And BTW, the smds that biased with a 11k resistor did sound good in the blackface (with 11k drain resistors) They just give the pedal a different gain structure, not quite the '65, but still sounded really good.    

[OcularDawn]

Thanks for the great info MAO! That's what I'm concerned about, that the varied spread won't yield an authentic sounded 65'. Wampler said something on another forum not to 'cheat' with drain resistors that strayed too far from those used in the circuit as it may not turn out sounding like the original (although I think he was discussing the Plexidrive at the time). Still kicking myself for flipping the 65', great sounding circuit. See Wampler have discontinued it too, probably for the reasons discussed above. Glad yours has worked out well though!

[Gabi Smith]

I'm proud of this one  

[OcularDawn]

That's got character and character goes a long way!

[Heath]

Now, that's my kind of pedal.

What layout is it based off of, and how does it sound?

[Gabi Smith]

Thank you for the compliments.

It sounds very good, like a modern fuzz should.

Here is a link to a demo :-)

https://youtu.be/5W3fNhkDgD8

I made the layout. It is a fuzz face with some Dam Meathead mods to make it quieter.

As the voltage between the emitter and the Collector of Q1 reacted strangely when i tried to bias it with a pot, and because i did not heard many différences when I changed the valour of the resistance of the collector of Q2, i kept the classic 8k2 one.

Here it is. I don't know if it's the right way to do it, but it's the way I do.

[Heath]

I really loved your original phrasing: "I don't know if it's the way to do it, but it's the way do it."

It also happens to be accurate, as that pedal sounds really good.

Also, kudos on the layout (especially using perf board, which I started out using and know it can be tough)! I've done a few simple layouts, but it's never been something I felt very confident about, and it's never ever just been easy for me. I've built around 100 pedal circuits and I still tend to do dumb shit.  

I can, however, somewhat proudly say that even with my ridiculous clumsiness, I've never burnt myself with a soldering iron. It ain't much, but it's something.

When I read your initial post about this pedal, I was a bit doubtful about how it would turn out (no offense meant by that), but you nailed a great sound!

[Gabi Smith]

Yeah, that's "but it's the way do it" was cool, but didn't means what i wanted to say.

I've begun this hobby only few months ago, and only have soldered perfboards (and already have burned myself with a soldering iron). Perfboard is what was given to me in the shop of my city. I've got 10 veroboards at home, but in my area, everybody seems to prefer the perfboards. So i've kept them.

I only reproduce in the layout what i've chosen to let on the breadboard. Hehehe, it's the way do it !  

[Senor Avocado]

Hey guys! I finally am posting gut shots that I am proud of! I am not yet done with the outside, but below are the finished guts  

It is a RC Booster into a 5 knob Engineer's Thumb from Sabrotone's Layout in a white 1590bb from Tayda. I love how mao and johnk use the stress relief for the wires, so I have incorporated that into my build. Thank you everyone for being such a great resource!

[MAO]

Looks great Senor!

Can't wait to see the faceplate.

[MAO]

Multiplex JR w/o the modulation

[Sensei Tim]

This makes me happy.

[Gabi Smith]

Both are very clean. Thumb up !

[MAO]

Hamlet Delay by Jon Patton.

IMO, the headroom and Tone/noise control sets this PT2399 design apart from the others.

1st PT delay I want to keep for myself! Highly recommended!

Any suggestions on what I should put in the space between the Mix and Delay knobs? Looks barren. (need some other Tone knob too)

[rocket88]

nice job mao.

this really isn't a pedal, but figured everyone would dig it.

i made a little 100watt solid state model t. it runs on 110VAC that's converted to 24VDC. honestly, it sounds about as close to the real deal as you're gonna get without tubes. there's some subtle differences in the breakup, i've played the real deal, but really not enough to really make a difference. plus, since it's 100watt you definitely could use it for a gig. it's fucking loud, especially if you've got the gains up to 12 o'clock.



still have to make the cab for it.