For Mr. RedEyedJim,
Folks are probably getting tired of me extolling the virtues of the TA-15.
I think it's a great piece of gear. It does a great Jerry across many eras...Especially '76-'77. I have the TA-15 head & I built a SSP 1x from the drawings Tracy posted. I love it. Great for the bedroom. Plenty of volume for bar gigs. Bigger rooms need more whump. I dial the Bass off, and dime the treble. The TA-15 doesn't have onboard reverb, so I place a EHX Holy Grail between the guitar & the amp. That leaves the OBEL open to bring in the Mutron or Dist+ with the onboard switch. I really like the 15 Watt mode. It'll even bring in some Althea like low-note growl. Not like a big amp, but still cool. The 6 watt mode does it also, but you need to get the volume up a bit.
I also have a '67 Twin Head. It needs to be Jerry/Waldo-afied. TA-15 is much better (and lighter). Now my SMS>Mc250...there are differences, but they're subtle. The SMS rig feels fuller. Both are multi-demensional but in different ways. I used to have a Mesa Mark I with a K120. That sucka was way loud, but it gave me a start on working with a magnificently bright rig. The TA-15 keeps that right-hand practice going. The Vox voiced side with the Top Boost is incredibly dimensional & bright. I've had it over a year, and for my Jerry practice I've switched between the Tweed voicing & the Vox voicing several times.
If you have a JBL cab, haul it into your local music shop. That's what I did. They were accomodating and curious. The one "Jerry Expert" who didn't know what an OBEL was had to tell me that I wasn't Jerry...which believe it or not...I already knew...but the amp with a JBL kept him listening.
To be honest I haven't done a whole bunch with the high-gain stuff. They're nice...but it's pre-amp gain. From that perspective the Mesa setting is fun. The Marshall setting is also cool, I just don't need it. I'm having a licentious affair with the Earth Drive pedal. Just a touch sounds like big 6L6's cranked while cruising on one coil of the middle-pickup. I flip the Super 2 to HB mode, and I'm not kidding here...it's almost to Neil Young Cortez the Killer.
I might've held out for the TA-30 head for the onboard reverb, but then again the 6 watt setting is very useful.
Fun stuff. Happy to answer more questions if I can.