A couple weeks ago, I went up to Boston to record the wonderful
Julia Torgovitskaya aka
juliatorgo at Tufts' exceptional new Distler Performance Hall in the Granoff Music Center. I use an incredibly simple, cheap and effective rig to record live to two which consists of 2 AKG C 414 B-XLS microphones, 1 Aphex 207D and an M Audio Microtrack. This allows for
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Another option is to use Krazy Glue. Put a tiny dab on the sheared-off screw and tack on a similarly sized piece of metal. Wait for it to dry and just unscrew!
That's strange about the popping. I'd be interested to know what the root cause is once you've finished your detective work.
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Glue wasn't really an option here because the cross section was so small that I would have been just as likely to glue the head onto the surface as I would've been to the screw shaft.
I'm almost positive the over voltage caused either a heat or plate voltage problem with the 12AT7/ECC81 in this thing.
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Where did you get those condenser mics!!! They must make Yuliya sound awesome (and warm!)
My guess is either:
1) Vacuum tube going, replace in matched pairs (both stereo sides of the amp)
2) Static buildup in the chassis. Check the grounding circuits of the cables with an Ohm meter.
Btw, check the "fire-bottles" in the mic pre-amps too!! And make sure those are properly grounded as well!
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As for your guesses, there is no amp here. There is only a single tube in the Aphex which is the mic pre. The static buildup theory is good thought though. I had swapped cables though.
The AKG C 414 B-XLSes are widely available. Most engineers dislike transparent gear because they primarily capture sound sources that sound like shit and therefore need a lot of help - i.e. Marshall stacks or singers who can't sing very well.
That hall was really out of control though as it was super wet (most halls are wetter when they are new). We need to record again so I can do it right now that I know the problems that are gonna come up in post.
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Take a VTVM or similar and check the neutral-to-ground of the power receptacles your stuff is plugged into. If there is ANY resistance, then that is most likely the source of phantom static and/or electric charge of one type or another build-up in your equipment.
(as well as being incredibly unsafe for the performers, as well as tech staff)
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"A few days later at home I plugged my 207D in and just watched it for a few hours. Sure enough, it eventually started popping..."
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