New design, it's been awhile

[Mark Hammer]

Pretty much as predicted, eh?

[petemoore]

Joe, Indirectly or directly [in my case] had a primary role in getting someone interested in building stompboxes, discussing circuits...
   Thank You Sir !!!

[PB Wilson]

Joe certainly has given the DIY community some food for thought over the years. I've been enjoying his Tone Dog circuit for some time and best of all, Joe is sending me the pots to build up a Decade prototype. I hope more folks get involved and make this potentially VERY useful pedal. I've got my breadboard ready willing and able.

[Ben N]

Tone Dog?

[puretube]

2 cents more from me:
add a pulldown-resistor to the "left" of the input cap (e.g. 4M7),
against switch-poppin`...
:wink:

[phillip]

Tone Dog:



Phillip

[puretube]

lemme add a pulldown on that one, too...  

[joegagan]

correct again.
I had been getting away without pulldown resistors on my earlier pedals, but I took the Decade Proto to a blues jam downtown last night and noticed a pretty bad switch pop, funny you mention this the same day I decided to add one.

The good news is that the pedal sounded great through a Laney AC30 type amp. Nice breakup while retaining chord clarity. Another guitarist  in the audience noticed how clean it got when I turned the guitar volume down, and said that it was a great replacement for a Ts type pedal (I had the gain about 80% up).

Thanks to those who have volunteered to build it, I will get to modding those pots tomorrow and get them in the mail.

[sean k]

Howdy Chaps,I've nearly finished building my one but cut the trace in the pot at the wrong end so I'm going into the shop later to get another and hopefully I'll cut it at the proper end.I put sockets in to try the J201's and also I'm able to switch in a 2N7000 mosfet at the first stage after building the multiface with them and liking the sound.I also put in a extra chain of GE diodes to switch between.I'll have some photos up of the circuit unboxed by the end of this day or in about 8 or so hours.
 Also the cutting of traces is an old trick for guitar tone controls to lift the signal from the control,but cut at the high end, and get a slight boost and similar,kind of, to the tone lift switch in tube amp tone controls to lift ground.Hats off to Mr Gagan for such lateral thinking and I'm looking forward to hearing this one.

[jmusser]

Hey Joe, good to hear from you. Are you still double neckin?

[sean k]

Well I just fired mine up and I do like it very much and the addition of germanium diodes is a plus for a slightly smoother sound at full bore.My 2N7000 isn't working so I'll have to go in and figure that out but apart from that its a very nice classic kinda distortion overdrive.I haven't subbed in the J201's either so I'll go and fix the 2N7000 and see what happens then box it all up before subbing the J201's in.Oh,and I used an AC 130 which happened to be lying about and came up with an hfe of 140 in a regular DMM test so it may be super leaker but it works.
                    Cheers Joe!

[dosmun]

Anyone else built one of these yet?  I am waiting on some parts and I will get one going.

[dosmun]

I got mine up and going.  I haven't spent much time with it but it can get a little too compressed with the clipping diodes when cranked up.  It may be worth while to put a diode lift switch.  I want to experiment with some other clippers as well.

One thing I caught on the pic of the dual gang pot is that pin 1 and 3 need to be reversed for the diode lift.  The schematic is correct but the picture of the pot has the wires reversed.  I did try J201's as well and may slightly favor those over the 102's.  I will be spending more time with this tomorrow to get a better feel for it.

[Ry]

I've got mine to the debug stage without any luck yet.  I think I might know where I went wrong, though.  Did you connect the Drain of the FETs to the 1M resistor that runs to the wiper of each 25k trimmer.  The schematic makes it look like that point is connected and I'm having trouble believing that it is for some reason.

Thanks!

Ry

[EdJ]

Hi Joe!
great to hear from yoe again!
I still think the Skyripper is the best fuzz ever.
The guys in the band don`t always agree though :wink:
Greetings,Ed

[dosmun]

Did you connect the Drain of the FETs to the 1M resistor that runs to the wiper of each 25k trimmer.

Yes I did.  Mine fired right up but was a little gated at first it ended up being a ground point that wasn't soldered.

[Headshot]

Has anyone worked up a stripboard layout for this circuit?

Head

[dosmun]

Has anyone worked up a stripboard layout for this circuit?

I have one that drew up but I haven't tried it out.  I ended up using pad per hole board so it wouldn't get too big.  I just have my vero layout drawn out on paper so far.

[joegagan]

Dana and Ry both detected the same error form opposite ends.

The pot diagram is correct ( don't reverse ground end as Dana suggests), the error is that the wiper of the right side half of dual gang should be hooked to the top lug, not the grounded side. This also addresses Ry's concern.
updated drawing on the way.

[joegagan]