cool, glad to see this alive again....i did bread this, and was brutal,
i ended up ripping the gate out, though it was a cool feature there was no real adjustment,
i also ripped out the tight pot section too
and ended up with pretty much a bare bones schemo in the end....
just vol, tone gain...
Rob,
Agree 100% on the "tight" control! Even on the retail pedal it's a less than useless feature if you wanna call it a feature in my opinion... Should be called the "Thin, Not So Good, wtf is that, frequency damper".. Honestly the damn thing is tighter than a gnats @ss as it is and I never even touch that knob, unless of course it gets bumped up by accident in which case I turn it completely back off again! I figured since damn near the whole Amptweaker pedal line up has a "Tight" control that it must have some dramatically good effect on the attack or something but, that was exactly the opposite?

In regards to the gate I'm not sure what you mean when you say "there was no real adjustment"? On all of the ones that I have built if anything the gate has too much adjustment! By that I mean you only really need to crack it on just a hair to get rid of most of the nasty high gain hum and hiss... Anything beyond the "sweet spot" just muffles the notes and kills the sustain. That is why I don't like the idea of the dual gang Gain/Gate pot. It's a great idea just poorly implemented in this design.. The gate to gain ratio is way off, you could probably get better results with a 100k pot vs 500k..
I have one with a full tone stack that I have been messing around with off and on and trying some different gates like the one on the G2D Morpheus and the one used in the Elan Metalhead Excalibur preamp. I've been tinkering around with this Peavey JSX hum buster diode gate before I ever even got my hands on the Amptweaker pedals, I was putting them in the JFET pedals like the Black Forest and Engl etc.. I expected that the Tight Metal would have the same gate as the Peavey amps since they were designed by the same person and as soon as I played one I knew exactly what it was even before I tore into it! They're really good for what they are but, if you really want a good gate then get a Behringer Noise Reducer (NS-2 clone) or better yet a Decimator.. Also, have put an mxr micro amp type boost after it and really kix it up a couple notches! I haven't really found anything that sounds good in front of the TM.. Tube screamers, boost circuits all degrade the sound so, I am curious what he's using in the pro versions, maybe they sound like sh!t also..? Kinda like the "Tight" pot does...

I am curious to get a look inside the pro series but for now I will just keep messin around with what I have... I mean the basic design of these pedals is what everybody likes, all the rest is just ba bling ba bling..