3 Legged Dog

[Chris60601]

Here's something from ROG. I haven't verified this as of yet however, I will probably build it tonight. Would certainly appreciate any input (good or otherwise).

Cheers
Chris

[Ciaran Haslett]

Hey Chris.

Looks like there's a few errors.  Gain 2 (labelled as 3) is connecting to pin 5 when it should connect to 6.  Theres also a 2m2 missing from pin 5.  That 47k on Volume 3 could go to pin 14 as its already linked to ground instead of spanning the whole board.

[Chris60601]

Thank you sir, much obliged!
I moved Gain 2 over to the other side of the board (I think this should be Ok) and for the missing 2M2 - I have it extending beneath the IC with just allowing one leg to be longer than the other. Other adjustments made too.

I know this is a pretty basic circuit and my 2nd attempt at a schem to vero project. I'll get better at this, I promise


Cheers
Chris

[Alex]

CONTENTS DELETED

The author has deleted this message.

[Chris60601]

Sweet! Smaller is gooder
Updated with v2. Thank you albru80!!

Cheers
Chris

[Alex]

No problem! Happy to help!

[Alex]

Hi Chris.
Just checked the schematics and realized the Input is in the wrong place.
It should go like this:

[Chris60601]

Ugh. How could I have missed this?!?!

I'll get this later on.

Cheers
Chris

EDIT: and now updated.

[Frank_NH]

Neat project.  I have a bunch of 4049UBEs so this is the kind of circuit I could use them up on.

A couple of thoughts.  This circuit is very similar to the "bounce" side of the ROG Double D overdrive (schematic) below.  I would consider adding some improvements from Double D to the Three Legged Dog (...giving us the D Dog! Heh. )

(1) 20K or 50K trimmer for the JFET.  The 8.2K drain resistor will only work if Idss and Vp are in a certain range for the J201 used (my JFET calculator indicates the drain resistance required will be in the 10K range for some typical Vp and Idss values).

(2) Small caps in the inverter feedback loops.  That should help tame the squealing reported for this circuit.

(3) Optional output buffer like Double D.

(4) Try different values for the 10uF source capacitor on the J201.  My experience in the past is that you get a big boost with a large cap value, but if it's too large the boosted bass frequencies can be too much.  Lower values can tame this effect - or you can put it on a switch as a "boost" option.

[Chris60601]

Hey thanks Frank!
I'll give this a shot when I get past my epic fail phase  

Cheers
Chris