Did I blow up a tube mic cable?

[matthewinphilly]

Hello Wise People:
I just got an SE Electronics GEMINI Dual-Tube mic and tried setting it up and am getting no sound out of it. I see the tubes light/heat up, but nothing gets to the preamps. I've got the supplied Mic-to-Power Supply 8 pin cable hooked up and then a XLR cable going from the external power supply, but no sound. I tested the very mic I have here at home in the store I purchased it at, and all systems were go there.

I'm fairly sure that when I powered the mic on at first that the 8 pin cable was hooked up incorrectly (i.e., Pin 1 on the power supply end wasn't going to Pin 1 on the mic) even though it has an indentation at each to make sure you connect correctly (the indentation on the mic end still allows one to hook it up without being perfectly aligned).

Did I blow some of the wires in the cable when I hooked it up wrong initially? I know I hooked it up wrong, by the way, because the tubes did not light up--then when I got the pins aligned, I got the tubes nice and warm...

Any other suggestions? The only other thing I'm wondering about is just to make sure that a house in the US runs on 115V power, right? (230V would be for Europe, yes?--the mic power supply has a choice between the two). I realize that someone recording music probably should know such an elementary electronics thing, but I don't. Everything I've ever hooked up before now has worked okay...

Thanks in advance--I really appreciate it!
mp

 

[crazydoc]

Do you have another mic to plug into the preamp mic input, to make sure the circuit from the preamp to your recording device works?

If so, and all switches are in proper position, I'd guess you fried something in the mic by applying the high B+ voltage to it, maybe output blocking cap or transformer, whichever it has.

The power supply is probably OK, as it still powers the tubes, but then again, it could just be that the filament voltage is OK but not B+.

If it doesn't work, you need to take it to someone who does repairs - hopefully it won't cost more to repair it than you paid for it. Maybe the warranty covers this - look into it. Unfortunately, it's very unlikely that the cable is the problem.

 

[matthewinphilly]

Thanks...

Thanks for the response, Crazy Doc. I think I blew a tube... We'll see once I try and replace it.
mp