Per my previous post about my recently purchased 36 watter and not being sure which circuit I was getting....
http://putfile.com/pic.php?pic=4/10918082960.jpg&s=x11
Marshall TMB? Wreck?
Thx!
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Here's a pic - re mystery 36 watt circuit - wreck or not
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Soldano16
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Chubsman
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Looks like a TMB to me...
Look at you amp and this layout... Almost identical...
http://www.18watt.com/storage/36watt.png
Look at you amp and this layout... Almost identical...
http://www.18watt.com/storage/36watt.png
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krash
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It's kind of difficult to tell from that picture.
Component-wise, a "wreck" type preamp is almost exactly the same as a regular 36W. The difference is where certain wires are connected to the tubes, and a couple of component values. A wreck-type preamp would have about two or three extra components that I don't see on your layout but they could be on tube sockets or the back side of pots and I wouldn't see them.
The big tip-off would probably be this. If you can turn the volume knob up above 2 or 3 without it being really saturated, then it's likely not a wreck pre. If you turn it up past 1 without it having a fairly high amount of noise (hiss), it's probably not a wreck pre. If you can turn the treble knob all the way up and live to tell about it, it's probably not a wreck pre.
My 18W is very quiet with nothing plugged in and turned to 10, but my wreck-type-pre Princeton Reverb hisses like Niagra Falls with it cranked over about 2.
Odds are it's a regular 36W and not a wreck-type. The wreck-type pres are kind of special purpose IMHO and not likely to have been a first option for most builders. I am not sure the schematic or layout for a wreck-type 18W or 36W have been on this site before but they seem to have been mostly on Mark Huss's web site.
Basically if you can get any kind of clean tone with the volume above 1, then it's probably a regular Marshall/TMB pre.
Component-wise, a "wreck" type preamp is almost exactly the same as a regular 36W. The difference is where certain wires are connected to the tubes, and a couple of component values. A wreck-type preamp would have about two or three extra components that I don't see on your layout but they could be on tube sockets or the back side of pots and I wouldn't see them.
The big tip-off would probably be this. If you can turn the volume knob up above 2 or 3 without it being really saturated, then it's likely not a wreck pre. If you turn it up past 1 without it having a fairly high amount of noise (hiss), it's probably not a wreck pre. If you can turn the treble knob all the way up and live to tell about it, it's probably not a wreck pre.
My 18W is very quiet with nothing plugged in and turned to 10, but my wreck-type-pre Princeton Reverb hisses like Niagra Falls with it cranked over about 2.
Odds are it's a regular 36W and not a wreck-type. The wreck-type pres are kind of special purpose IMHO and not likely to have been a first option for most builders. I am not sure the schematic or layout for a wreck-type 18W or 36W have been on this site before but they seem to have been mostly on Mark Huss's web site.
Basically if you can get any kind of clean tone with the volume above 1, then it's probably a regular Marshall/TMB pre.
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