Joe Hart Dist. Build report

[tungngruv]

Just finished Joe Harts JHDistortion. Pretty easy build and sounds great!! This pedal has lots of crunch, distortion and unbelievable tone controls for a stompbox (IMO). Perfed the board in a little over an hour and used ceramic caps as Joe suggested on his site. Lots of gain w/tone controls for Hi,Mid and Bass with an added control for Harmonics (I think this is like the AMZ "warp" control as it affects the clipping diodes). Anyway, killer circuit Joe!! Thanks for posting!!

[ragtime8922]

Where is it posted?

[Joe Hart]

Why thank you. Glad you like it! If you want, feel free to email me a picture of it and/or a soundclip. I'd love to put it on my site. Thanks again for the kind words.

Check out my site for more neat stuff...
www.RabbathRecordings.com

-Joe Hart

[tungngruv]

I do have a question on the build. I had to sub a 100 pf cap in place of a 47 pf in the circuit (feedback loop, I think) and I also had to use a 100K pot instead of 50K for the low end control. I have a 50K pot coming but will it make enough of a difference in the tone to replace the 100 pf cap with the 47 pf? I'd have to order that part. Thanks for any advice.

[Joe Hart]

Using a 100 pf instead of a 47 pf cap won't make much difference. The tone controls would affect the sound much more than that cap. Glad you dig the tones!!
-Joe Hart

[Torchy]

crp

[tungngruv]

Thanks for the reply Joe!! Really digging the pedal! Torchy, I found the schematic on Joe's site. Click "effects" on his home page, then when you see the pic of the JHDist pedal, there is a link in the text just below the picture. The thing sounds great. I actually am running an OD 250 clone in front of it for a "lead boost" for solo's (a little extra gain). I tell you what Joe, I'm going to goof around with using the pins 5, 6 and 7 of the 4558 to run another OD 250 in front and make it footswitchable. This combination gives really good OD tones plus with the extra pins used for the 250, it gets easily into the distortion "super saturated"  sounds. Once again, great job!!!!

[Torchy]

crp

[Joe Hart]

I'm glad some people are enjoying the pedal!! Tungngruv, let me know what you come up with for a "lead boost" using the second half of the op-amp.
-Joe Hart

[Torchy]

crp

[petemoore]

Nice site.
 Grreat sound clips, the narration is well done, really gives the listener info enough to 'see' what the pedal is doing as you turn the knobs.
 The pedal appears to be well thought out !!
 I don't recall seeing resistors on both sides of a capacitor, as in the 220R > C > 220R arrangement in the gain setting section.

[tungngruv]

I agree the tone controls can really interact w/ the whole circuit. I gotta say, this has been togother for a few days now and I seem to make time every day to plug it in at least for a half hour. It really sounds good w/ a strat and when I run my OD 250 clone in front of it, the sound is in the distortion pedal range (easily). I'm whipping up a OD 250 circuit tonight that I'm going to put in the same box, then use a SPDT to act as a "gain boost" for solo's or just a heavier sound. The "low" control really lets single coils get a fat sound with no muddiness. Once again Joe, VERY COOL PEDAL!!!!   Best thing sisce M. Hammer's "RoseyRay". THANKS!!!

[Burstbucker]

Sounds good Joe, congrats!

I'm more of a FuzzFace kind of guy but that pedal would surely be a big hit with a lot of guitar players.

I was just wondering, since no circuit is completely original, what other pedal schematics would be in the same vein as this one?

Again, nice work Joe.

[Joe Hart]

Petemoore, the resistors on both sides of the capacitor was just how I prototyped it. Then I liked how it sounded and didn't want to change anything!! Kind of silly, but oh well. I'm sure that it doesn't make any difference in the sound, but...
-Joe Hart

[Joe Hart]

Wow, to be mentioned in the same sentence as someone like Mr. Hammer!! I’m honored.
-Joe Hart

[Joe Hart]

I based the design on a DOD 250/MXR Distortion Plus with a little Tube Screamer thrown in for good measure.
-Joe Hart

[Ansil]

i have a lm386 version of it on the way.................  actually i was working on a dual lm386 version of my pedal that sounds oddly like this one.  when i get a change i will throw up a schematic.

[Image_sounder]

hai mr joe. I finished my effect and sound is very good, and very quiet. I want to ask u some question, The blend control in my effect is not different when i turn it up or down.
c5 is electrolit or ceramic or film ?

[tungngruv]

Image_sounder wrote

The blend control in my effect is not different when i turn it up or down. c5 is electrolit or ceramic or film ?

I had trouble with mine for a minute also. I rechecked the wires and made sure the diodes were going to ground and that lugs 1 and 2  were connected and then it worked fine.  C5 is electrolytic but I managed to find some that were non-polar so it didn't have a + or -. This pedal does rock!!

[Image_sounder]

after I recheck a wire finnally I find the mistake. A broken 100k pot. I change with a new one and now is working.
After try with differrent kind cap, I think the best sound is using capasitor film ( i used  22 5 cap film ).  Thanks for your help.