Yes, yet another NAD thread... I give you quite the oddball of an amp, stitched together seemingly from parts spanning the late 60's to around 1978, so the legends say...by amp witch doctor Mike Fortin that brought the beast to life. I give you..."Frankenmod"...
Frankenmod started life as a 1978 Marshall Super Lead, CSA (Canadian) model...according to the serial number. The interesting thing is the anomalies it has, which seems to be commonplace with Canadian models. Uncharacteristic layouts, random parts from much earlier models, etc. One Marshall fanatic noted the head shell looks to be from a late 60's model, who knows?
From there, it was off to Mike Fortin for initially what he calls his "Cali" Mod. This is also unique - relatively speaking - as far as Cali Mod's go. First off, it's the first and only 2 Channel Cali Mod. The front has the typical Cali Mod features, where as the back left features controls for a fully independent clean channel with it's own Treble, Mids, Bass, Gain and Volume knobs...with a Pull Bright feature. The channels are switchable in via a standard tip/ground footswitch via a jack located on the back. Beside it is Fortin's tube buffered FX Loop that's switchable from Series to Parallel.
The next somewhat unique feature is the transformer in it. Unlike most 70's Super Leads with typical transformers and running around the 450v plate voltage range, this one comes equipped with a "lay down" transformer (ala earlier models) that has it's own thermal fuse in it (odd, I know). Along with that, when Mike measured the plate voltage, it wasn't reading 450v-ish like one would expect. Instead, it's measuring out around 520v! To my understanding, that hasn't been typical since the late 60's and possibly very early 70's models. Just another oddity giving it a unique twist. From random parts (notice the switches, one old school plastic and one later metal toggle), a lay down transformer and running at 520v, a serial number from '78, a configuration more akin to the early 70's, a head shell speculated possibly from the late 60's...and you have "Frankenmod." It has minor swaps from there...was recently recapped I believe with F&T, Mike installed a new impedance selector switch to get rid of the old faulty one, the red light was replaced with a Fender style jewel lamp, fully retubed, etc.
The 520v actually lends a different vibe to the amp, in Mike's words makes it more "alive." It also lends to more output wattage, probably running somewhere between 120W to 150W.
Wow, that's pretty damned cool. How about more pics? I can't for the life of me figure out what all those back panel knobs are.