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100ft run or more, 48 v power supply location

Another first for me here.

I have 100 ft run to the piano. Using Mojave MA100's SP for the first time. They come with its own PS. The micpre's have 48v too. Do I use one or the other or both in a long run or longer runs? Do you ever need to use both to ramp anything up lada lada lada?

Housing/Power supply racks for 500 series preamps, etc.

500 series preamps are a pretty popular item for discussion around here. I thought I would start a thread on the racks that hold these units. I'm going to give it a go as a first shot and as new or better information comes in I will edit this first post to try and make a pretty comprehensive list of options.

Help! Groove Tubes 6TM Power Supply cable Pin out schematic/ ADAT Elco to 1/4" snaKes

I have an old Groove Tubes 6TM mic with the PS1 Vacuum tube power supply. The mic end looks like the Groove Tubes EC7 cable in that it has a 7-pin connector. The power supply end looks like an 9-pin ADAT sync connector almost like a vga computer display connector. I am in need of the pin out configuration so that I can build one or a source to purchase one.

NADY TCM 1050 and M-audio Sputnik power supply

I Have a M-audio Sputnik microphone, but the problem is, that i don't have a power supply for it, which is a big problem because it is a 7-pin multi-pattern large diaphragm vacuum tube condense microphone, and there is no way to get it I live in Czech republic and here it's impossible to order it.