Ground hum issue!

[CV_Wonder]

Hello again,
Thanks everyone for your past help on questions I've had. I'm getting further on this DIY project I'm doing and having a big buzzing issue.

I have a stereo cassette head I'm running straight into a little pre-amp circuit. However I haven't been able to find a pinout diagram anywhere online for some reason. The head has 4 pins. I'm currently trying the left two pins going to L/R inputs and the right two pins going to L/R ground. This is causing a great deal of buzz and hum and one side doesn't output. I have the tape head fastened to an aluminum enclosure and I'm wondering if you usually need plastic washers or anything to separate contact to the metal bracket?

Here is the circuit I'm using. http://www.electronics-lab.com/project/ ... amplifier/

Best,
E

[Drone]

Isn't a head just a coil, electrically speaking, in which case continuity checking should reveal the pinout.

You'd have two coils, so two pairs of pins.

[CV_Wonder]

Isn't a head just a coil, electrically speaking, in which case continuity checking should reveal the pinout.

You'd have two coils, so two pairs of pins.

Yea your right. So this means that when I wire it up based on the schematics in that website then everything shorts to ground... Not sure how else I could be wiring it up since both ground pins share the common ground on the board. Hope that makes sense. Again very beginner here.