http://forum.metroamp.com/viewtopic.php ... a&start=51
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Possibility 1:
*\ switch? on pot
V---------\-----------* *-------------------8||8-------------\
speaker / 8||8 /<--*--------V
jack \-arcol 16ohm 8||8-transformer \ /68k (x2)
from amp / resistor 200watt (load) 8||8 (gnds tied) / \
\ 8||8 \ / output jacks
O---------/----------------------------------8||8-------------/---*--------O
|_______| 250k pot
|
||| ground
Possibility 2:
*\ switch? on pot 250k pot only 2 lugs used
V---------\-----------* *-------------------8||8-------------\/\/\/\/\
speaker / 8||8 ^
jack \-arcol 16ohm 8||8-transformer |--*--------V
from amp / resistor 200watt (load) 8||8 (gnds tied) \
\ 8||8 /
/ 8||8 68k(x2)\ output jacks
O---------\----------------------------------8||8--------------------*--------O
|_______|
|
||| groundIn both scenarios the secondary load gets changed as you adjust the 250k line out pot but one way it gets bigger and the other it gets smaller. It's hard to tell what's going on with the pot wiring wise. I have a couple of questions, Anybody in the know (Mark?) who could provide the specifics, I would be forever in your debt. Here goes:
1) Are either of these correct? or even close?
2) are the 68k resistors on the switch lugs of the output jacks or are the always in the circuit?
2) Is the pot a Push Pull type or a on/off type? It looks like there's definitely a switch on the back that the green wire goes through.
3) What kind of transformer is it? Any identifying marks? ratio? I'm asking here because it looks small enough that the 20 or so volts coming out of a dimed plexi could probably distort it a bit so it's power handling might be important tonally.
Other than my beautiful ascii art, what do you think?
