I need help with the vero of Doug Hammond's tone source

[charmonder]

I checked it over about five or six times now I can't figure out what went wrong,

http://www.aronnelson.com/gallery/main.php/v/ulysses/ulysses_layouts/ulysses_dh_tone_source/dh_ts_vero_ulysses_1_4.gif.html?g2_imageViewsIndex=1



First I used 333 caps to get 33 nf     And 224 caps to get 220 nf ....   Is that correct so far?

Then, the part im most shaky about is that because I had limited capacitors around, I made two small daughter boards with what I proposed to be equivalent capacitances:

For c1 which is supposed to be 470nf,  I have three caps in parallel:  . 334, 474 and 104,   I thought that should add up to an equivalent of a cap that reads 474 or 484....
And then c 10 is supposed to be 220nf.  I used 473 and 184 caps in parallel...
Are these right?


Second I thought there might be the possibility that I misunderstood how to wire the 4p3t tone switch... ( or is it. 3p4 t?..)  but even so I figure this is negligible because the switch in position one creates no connections and the pedal should work anyhow.. Is this true?

Third theres the fact that I'm actually not using a tl072, but I tried placing a 741, tl082 and 4558 in it's position  for less than satisfactory results, it seems the circuit I have here is amplifying sort of, I can get a 8 bit sounding fuzz out of it in some positions....

Again I checked this thing several times already, Does it seem likely that maybe I broke the 8 pin chip holder ? This is my first time using one of those...

[charmonder]

  . Yes! I got it, I missed a trace, I shouldve mentioned I didn't use a real vero, I just used a perfboard to do a kind of part to part build, so I missed one messily connection.       

Just testing it out I already love the sound! Ive tried so many overdrive distortion pedals looking for this,    Kind of rolling stones ish sound....   Do I detect there is a slight compression to the sound?  Anyhow i think brownsource/tone source is very underrated, I shouldve built this pedal months ago but the word around these forums was that it was only an okay sounding overdrive.       


If anyone's still reading, do you think if I changed r1 to a higher value I could get more gain? Or maybe I could swap the gain pot for a higher value? 50k?

[charmonder]

Okay I think I'd like this thread to be deleted if possible, I'm not sure how to mark it as " solved" either...

[DougH]

The twank setting is definitely Stones-ish. With this overdrive so much depends on your amp a lot of people just won't "get it". Their loss, unfortunately. This is truly an amp overdrive. The amp has to be breaking up or on the verge of breakup. This pedal adds a soft clip, EQs the signal and pushes the amp into a nice pverdrive sound instead of creating the sound internally. That's the whole point. With a clean high headroom amp like a BF it will be very underwhelming.

You can increase the gain but it will lose the "magic". The first stg actually attenuates the signal in the passband with gain at unity- weird... But it's the way it's EQed. Believe me I tried all the tricks when it was on the breadboard but they just destroyed the character. Think of it as a booster with a fancy EQ.

Glad you are enjoying it. I think it's pretty cool myself.;-)