[Scott Dorsey]

Richard Crowley wrote:
wrote ...
AT 3060 Phantom powered tube mic.

How do you phantom power a tube ("valve", aka. "firebottle")
device? You can't draw enough power through the 6.2K
resistors to heat up the filament?

You use a hearing aid tube that is designed to run off a 22.5V photoflash
battery and has minimal filament draw. At least, that is what Gefell does.
I have not opened the A-T yet.

If you do this, though, you get hardly any current drive. Either you need
a solid state output stage, a stepdown transformer (leading to very low
output level) or you get issues with long cable runs.
--scott


--
"C'est un Nagra. C'est suisse, et tres, tres precis."