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WTB: very strange old mic cable

Posted: Fri Nov 30, 2012 11:00 am
by jdogric12
Long shot, but just in case... anyone have a mic cable that connects 5/8" screw-on (like old harp mics) to XLR?

Re: WTB: very strange old mic cable

Posted: Fri Nov 30, 2012 11:02 am
by jps
Amphenol connector? If so, I can check my resources.

Re: WTB: very strange old mic cable

Posted: Fri Nov 30, 2012 12:45 pm
by johnhall
Like this? I happen to have one here on an old mic I'm trying to restore.
IMG_0425.JPG
Amphenol MC1F and Switchcraft 2501F

Doubt you'll find a cable already made up since this is usually a high impedance connector, unbalanced, whereas the XLR is typically low impedance, balanced line. But I've made them up before in the past.

Connectors are still readily available- best bet eBay.

Best practice is to use as short a cord as possible with single conductor shielded cable then go to a balun with XLR out then on to the snake or board. Could also use a cable MC1F to phone plug, then into a DI, preferably a 48 volt phantom powered one.

Re: WTB: very strange old mic cable

Posted: Fri Nov 30, 2012 1:28 pm
by jdogric12
Thanks guys! Great info John. That's the one. I was wrong to want XLR... and I should know better, it's a hi-z mic, so that would be 1/4", yep. I've located a connector. Now just to cross my fingers and hope the ribbon still works!

Re: WTB: very strange old mic cable

Posted: Fri Nov 30, 2012 1:33 pm
by jps
jdogric12 wrote:Now just to cross my fingers and hope the ribbon still works!
This guy can probably take care of any issues you may have with the mic. 8)

Re: WTB: very strange old mic cable

Posted: Fri Nov 30, 2012 2:48 pm
by johnhall
jdogric12 wrote:I was wrong to want XLR... and I should know better, it's a hi-z mic, so that would be 1/4", yep. I've located a connector. Now just to cross my fingers and hope the ribbon still works!
There's nothing wrong with using an XLR for high impedance- they're great connectors, terrific shielding. The problem is that people then want to plug them into a low impedance balanced line system which may or may not work well, depending on the gear's input circuit.

The mic I have has a shot coil/diaphragm cartridge that Shure doesn't make anymore. I hope you have better luck.

Re: WTB: very strange old mic cable

Posted: Fri Nov 30, 2012 4:35 pm
by cjj
johnhall wrote:
jdogric12 wrote:I was wrong to want XLR... and I should know better, it's a hi-z mic, so that would be 1/4", yep. I've located a connector. Now just to cross my fingers and hope the ribbon still works!
There's nothing wrong with using an XLR for high impedance- they're great connectors, terrific shielding. The problem is that people then want to plug them into a low impedance balanced line system which may or may not work well, depending on the gear's input circuit.

The mic I have has a shot coil/diaphragm cartridge that Shure doesn't make anymore. I hope you have better luck.
Yes, it's not the connector, just the circuitry, and using a connector such as an XLR, which is the standard connector for a low impedance (nominal 600 ohms) balanced (same as differential) configuration may lead to confusion down the road.

Of course, if you do as John suggested and use a balun (balanced to unbalanced impedance transformer), then things will match up and work as everyone expects...

Re: WTB: very strange old mic cable

Posted: Sat Dec 01, 2012 12:04 am
by johnallg
johnhall wrote:
jdogric12 wrote:I was wrong to want XLR... and I should know better, it's a hi-z mic, so that would be 1/4", yep. I've located a connector. Now just to cross my fingers and hope the ribbon still works!
There's nothing wrong with using an XLR for high impedance- they're great connectors, terrific shielding. The problem is that people then want to plug them into a low impedance balanced line system which may or may not work well, depending on the gear's input circuit.

The mic I have has a shot coil/diaphragm cartridge that Shure doesn't make anymore. I hope you have better luck.
Which old Shure?