This was in a Peavey powered mixer. I figure if the supply were completely bad, none of my other condensers would have worked. I subbed in an AT2020 and that worked. The board was also powering an MSH-4 (phantom-powered tube mic), a SP B3, and an MSH-2 at the time.
I figured my Hamburg was just bad, but I brought it home and hooked it up to my Peavey PV8 (unpowered mixer) and it worked fine.
Dunno.
The MSH-2 and especially MSH-4 are thirsty mics. Combined, they could bring an underpowered board to its knees, especially if the Hamburg also needs a fair amount of current or full voltage. Try testing an empty channel with the mics all attached, and see what the voltage is. A *compliant* supply should be no less than +44V.
Most MSH-2s I made were intended to run on lower phantom supplies, the flip side of that was that the power supply circuit wasted current with full P48. Later on, I gave up on the low-voltage feature, changed the circuit, and listed it as +18V minimum. That was because some portable and USB pres were having trouble, which is sort of the opposite of what I had designed.
The trick is a preamp manufacturer feels obligated to list a +48V voltage spec, even if that means very limited current from the pre's DC converter. It used to be that they would go with +24V and be happy, but that's not really a commercially acceptable solution anymore, even if most electret mics work fine with that. This thread is a good example: AT is conservative in their specs, so it wouldn't surprise me if the AT2020 did work with +30V. I think their SDC range (3031, 4041, etc.) are spec'ed at lower voltage though, so an email to AT support might be worthwhile. The Shure SM81 is spec'ed down to +9V, and I can confirm that the KSM141 works with +9V.
Anyway, in your MSH-2, you might want to swap R1 and R2 to 10K. Or send it back to me and I'll do it without charge. That will save a few mA on your Peavey board.