How to test a cartridge?

Edle, though I think Consttraveler's cartridge test might cast some doubt on the cart being the problem, his swapping-out the preamp and phono preamp eliminates the preamps from being the problem. Consttraveler, since you say you swapped out all the IC's plus the TT, I will assume that there is no wire, including headshell leads, tonearm wire, etc. in common. If so, this is a stumper for sure, but I would take the additional step of hooking up the cartridge with the headshell leads reversed left for right, just to double-check on your meter-reading test, since it appears that your cart is the only common denominator.

Consttraveler, you say you changed turntables? This I find a bit confusing. Do you mean, you removed your arm plus cart and mounted it on another turntable?? Why that? Did you check your cartridge leads to the phonopreamp with your ohmmeter? Do both carry signal? If yes, do as Zaike suggests and let us know how it goes. Good luck!

Thanks for the quick responses!

Edle: I did switch the pre-amp leads which resulted in the sound moving to the left channel, and the right channel dying. That's when I hooked the ohm meter to the cart.

Detlof: I removed the cart from my Rega P-25 (thinking I might have a problem with the Regas' connection. I then installed the cart. in my Thorens TD520 / SME 3012R, that also has a brand new set of cart. leads installed in the headshell. Same result, no left channel sound, not even background noise when the volume is cranked.

After all that, I removed the cart., checked it with the ohm meter and got approximately equal resistance on both channels. I then re-installed the cart in the headshell and checked the resistance at the connections on the downstream end of the headshell. Same result, equal resistance on both channels.

Zaikesman: I am going to try swapping channel leads to the back of the cart., as you suggest. If it is the cart. I should get music on the left channel only, correct?

Correct - let us know what happens, this is truly a mystery for the time being...

OK, here is what happened.

I changed all four leads from the headshell to the cartridge, left channel & ground to right side, and right to left. I still have music from the right channel only!

BTW, I double checked all interconnects and speaker wires and every thing is connected correctly (right to right, left to left, etc.).

I'm at a loss! Anybody have a suggestion?