M A Cotter MK-2 transformer differences?


Does anyone here know the difference between P, S, Etc. models of this MK-2 Moving Coil Pickup Transformer? I have one that does not have the designating model sticker and would like to know what its application is. Thanks in advance!
damen_red

Showing 1 response by fosse

I have some scematics but they don't match the service-manual I found on vinyl engine.

The Cotter MKII have 5 pins horisonataly (1-5) and 4 pins vertically (A-D). Mine is wired like this:

A1+A2,A3+A4
B1+B2+B3,B4+B5
C2+C3,C4+C5
D1+D2,D3+D4+D5

+ meaning they are connected.
The wiring instruction I have says this is the type "P" or "I" (bad copy), made for 25-40 ohm.
There is an other option calltd "X" or(P-P) for source impedance <20ohm. Does anybody know how I should wire to match my XV-1s (6ohm). In the owners manual the X and P-P are two different models.

The problem is that the wiring instruction and the owners manual don't state the same impedances for the different types of the Cotter.