I'm building a HIGHLY customized script logo phase 90!

Started by WillakaLliw, March 01, 2005, 09:06:39 AM

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WillakaLliw

Ok, I'm building a phase 90 with these instructions: http://www.buildyourownclone.com/phaserinstructions.html .  I've found all the parts from a couple sources, mostly from smallbearelec.com.  The mods I want to add knobs for "depth" and "mix" ( http://www.buildyourownclone.com/phasermods.html ) and add a knob for "feeback/regen".  The coolest mod I'm hoping to do is this 90-180-360 degree mod ( http://buildyourownclone.com/90-180-360mod.JPG ).
 First, does anyone know how to add a feedback/regen pot to the circuit?  What extra parts would I need?
 Exactly kind of 1Meg pot (linear taper, audio taper, reverse audio, single gang, dual gang, etc.) would I need for the "depth" knob?  And what kind of 250k pot should I get for the "mix" knob?
 Now for the dirty on the 90-180-360 mod: does anyone know if that will actually even work?  I don't know anyone who's tried it, so it would be cool if anybody knows.  Will I need to completely populate the "additional" board, or do I only need to solder on the parts that are outlined in red?  I think I understand the entire diagram, except for those few stray red dots on the PCB that aren't connected to anything else.  Do those dots just mean to fill that hole with solder, or are they a misprint, or what?  Finally, what does that green line on the back of the "additional" board mean?

 This should end up being a really cool pedal.  Expression pedal jacks for "speed" and "manual sweep" control would be cool, but I'm not gonna get greedy just yet :lol: .  Any help would be greatly appreciated.

Outlaws

Those pots ares both Linear.  A=Audio/log  B=Linear

Mike Burgundy

...unless you have Piher pots (and some other brands) in which case "B" designates log. Nice, huh?

WillakaLliw

Thanksmuch.  Any word on a feedback/regen circuit or on the 90-180-360 mod anyone?


WillakaLliw

I'm thinking for the feedback circuit, maybe just connect wires from the tip of the "in" jack to a 500k audio pot to the tip of the "out" jack.  That's essentially what I did on the feedback looper I made a little while ago; is this the right thing to do?  
 And once again has anybody ever tried this: http://buildyourownclone.com/90-180-360mod.JPG?  Does it work, and how does it sound?

WillakaLliw

Here's a new circuit: http://buildyourownclone.com/images/phase45-90-180-360.JPG .  The guy who made it says it works fine except for a loud pop when switching between the four modes.  What are the green squares?
 Anyways, this looks a lot simpler than that other 90-180-360 mod.  So thanks for the help, I'm off to the parts store!

toneman

"green squares"  look like capacitors(caps).
"regeneration" will have to pick up a different point when
going from 90/180/360.
what happened to 270?
watch out for any inverters in the circuit.
keep the phase correct in the phase, or U will have weird cancellations.
stayphased
tone
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WillakaLliw

Thanks for the reply.  What kind of capacitor is it (how many uF, what material, etc.)?  Would I have to make a really complicated switch in order to make the "feedback" knob work in every setting?  I don't want it to get too complicated, so would it be easy to just have a feedback circuit that only functions when it's in the "90 degree" phase setting?  And I still don't know what to do for the feedback circuit.  Any thoughts, anyone?
 Oh, btw the reason there' no 270 is that it doubles each time.  45 x 2 is 90, 90 x 2 is 180, etc.