Hey folks,
I have a MMC 20EN with an intact stylus but it produces no output. I would like to measure its coil resistance but don’t have that 1/2″ adapter with external terminals that make it easy to test.
So I thought I could measure where the unbelievably thin tonearm leads are soldered to the junction plate with the external RCA cable leads instead. If I measure from the red wire to the RCA cable ground I get an unstable reading of about .3 ohms. Same thing when measuring from the white wire to ground. Is this not a good place to get a resistance reading from the cartridge coils? Or is my cartridge perfectly dead?
I tried the same test with a MMC 20E that has no stylus and got the same result. So do I have two dead cartridges?
Also, those very thin tonearm wires don’t appear to be insulated but they must be, right? I mean, they are all touching each other but I find no conductivity between them when I check. Very strange – and amazing!
Bottom line: do I need to find a 1/2″ adapter in order to properly test for coil resistance?
Thanks in advance for any info and advice!
Pat
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