This is my latest folly: I bought this on Ebay as a '73 or '4. Not much details listed on the auction. Turns out its '68 with the Blackface AB165 circuit. Sweet So i open the shipping box and am knocked out by the smell... someone had re-covered the thing with a cream tolex, glued down with Elmers glue and covered with mustard and ketchup( or blood) stains and reeking of 20 year old tobacco.. yycchhh turned it around and look in the back and its filled with nests... mouse nests , birds nests, bees nests... its like been out in somebodies shed for the last 15 years no doubt. Any rate, as bad as it looks and smells, after i blew out the nests and plugged her in she fired right up. A little crackly and with a pretty good hum, but not too bad. Plugged in my Pbass and instant warm tuby goodness issued forth. Good enough for now... so back out to my shop where i ripped off the offending covering, pulled the chasis and hardware and sent the guts off to my amp guy So today i got the amp chasis back from repair but im not ready with case yet (still waiting on Tolex and a few hardware replacement pieces)... so i temp slapped it back together to play with it all day. What a Sweeet amp!! No it doesnt get very loud(only 50 watts but more on this later), but for the volume it has in it, the tone is the best ive found yet. The preamp turns out to be remarkably versatile... you look at the controls, see volume, bass and treble for each channel and go mmmm big deal.... until you start to play around with it a bit. You have 2 channels, a deep and a bright and you can patch them together and dial in a mix of the two channels with the indvidual volume knobs. The range of tones seems limitless. And then you have a great sounding, grinding tube distortion sound right before it decends into unusable mush. All in all a most excellent amp for a couple of hundred bucks. Now on to the volume issue. The guy working on the electronic end of this project( and a fellow bass player of course) has developed a gizmo. He calls it a Tadpole. Its sort of a DI box but it plugs in to the speaker output on an amp, splits the signal and sends one half srtaight thru to another speaker output and the other goes thru a bunch of little electronic parts that some how take current away but leave volts...i dont understand how it works really. bottom line is ...outa your speaker output you get another speaker output plus a line level signal output. This isnt really a preamp out... its more like taking the entire output of the amp including the power tubes and reducing it to a usable strength signal, which you can send to a PA or another power amp plugged into more speakers. The possibilities seem very intriguing to me. Unfortunately, i dont have this Tadpole thingy yet, so it remains to be seen how it will work, but stay tuned as i shoud have it by next weekend. Ill post updates of the restoration as it goes along if anyone is interested.