Thanks for the clarification Mark.
This Expression build left me with the urgent need for an attenuator.
This one's loosely based on the Airbrake and it works great with my Wreck and also my old JMP Marshall.



At max attenuation there is a slight loss of brightness, but I can live with that. In the lower levels of attenuation there's no tonal change I'm noticing. One other great side effect is it also attenuates the not inconsiderable hiss the Wreck generates. 



This one's Mk 1, I've got some nicer and smaller wire wound resistors coming to build an enclosed, more roadworthy version.

I've got a G65 in a 1x12 Portcity OS cab.
Works good for me, they're open along the lower front, so they're a good compromise between open back spread and closed back bottom end. Not tuned though. Just another Aussies opinion though.

I haven't built a head case, but wanted to show mine off. Not as pretty as some builds, but it's my first amp build. Fired up straight off too.
Must say I love how it sounds.
Running Tungsol 12AX7 and Winged C EL34 at the moment.





Can anyone tell me about that 820 ohm resistor on pin 2 of tube one? It's on the layout, but I've not seen anybuilds that include it.
Thanks for looking!

I've had my 50w OTS for about 5 years now, and am very happy with it, especially now.
I usually use a Smartulator with a Lexicon delay/Reverb in the loop and a Port City OS 1x12 cab fitted with the ubiquitous Celestion G12-75.
None of these mods are mine, but I thought I'd share them with anyone new and take this opportunity to thank each of the members here who provided the threads that enlightened me- Bluesfendermanblues, Pickmaster and Bluesking

In reverse order of most profound effect, they are:

1) Series/parellel switch on Smartulator.
From THIS thread.
I much prefer the enhanced transparency of parellel mode, and it's simple enough to put a switch on the front panel of my Smartulator.

2) A switchable negative feedback loop.
Outlined HERE.
I've placed a switch on the back plate to the left of the footswitch jack. Mostly I leave it switched out as I like the looser feel and extra gain.

3) This one is probably the simplest, but had a huge effect on my amps tone...Raising the slope resistor.
I had always found the amp a little wooly and often ran the bass control very low. I actually prefered the control I got with the tonestack in jazz mode, but missed the extra gain a bit. Raising the slope to 200K really tightened up the low end and I'm totally sold on the clearer, sweeter voice.
I realise some guys here prefer to lower it, I'd venture that they're predominantly single coil players perhaps, where the extra girth is an advantage, but I'm a humbucker guy who mainly plays funk, jazz and jazz-rock stuff, and I also play an archtop a bit too, so increasing it and clarifing the lows has been a revalation.

Honary mention goes to putting the OD trimmer on the back- very handy! and a very simple treble bleed on the OD channel, which I now use less after mod #3. Both of these pots are mounted in the two full/half power screw holes on the back plate.
Having used JJs for a while I've switched to a pair os Tung-sol 12AX7s and won't go back now either.

So there they are, some great and simple mods, hope that helps someone, though of course, it's all just my opinion.