ubertar
Well-known member
Hey, it works!
Stopped by rat shack and picked up a couple 6v lithium batteries. Unfortunately, they didn't both fit-- they wouldn't let me take them out of the package to see if they would. But it'll run with just one. I filled the extra space on the neg side of the battery with a wad of aluminum foil. It's a lithium battery meant for cameras.
I've only tested it on my voice through a guitar amp so far, but it sounds good, with no sign of a brittle or harsh high end.
I dug under the foam in the case and found a spec sheet and some other papers. The freq response is 40-20k and the impedance is 100 ohms. It looks like this mic may have been made in 1976, because there's a note dated June '76 on one page that says, "For many years our 520 has had a 1k resistor in series with each leg of signal inside the fem xl3 cable con. Today I have removed the one in series with pin #2 of xl3.
At the top of the page it says Stanford MB Microphones. The MB is the same logo as the MBHO co. At the bottom it says Stanford International with a CA address. Maybe they were the distributor.
Stopped by rat shack and picked up a couple 6v lithium batteries. Unfortunately, they didn't both fit-- they wouldn't let me take them out of the package to see if they would. But it'll run with just one. I filled the extra space on the neg side of the battery with a wad of aluminum foil. It's a lithium battery meant for cameras.
I've only tested it on my voice through a guitar amp so far, but it sounds good, with no sign of a brittle or harsh high end.
I dug under the foam in the case and found a spec sheet and some other papers. The freq response is 40-20k and the impedance is 100 ohms. It looks like this mic may have been made in 1976, because there's a note dated June '76 on one page that says, "For many years our 520 has had a 1k resistor in series with each leg of signal inside the fem xl3 cable con. Today I have removed the one in series with pin #2 of xl3.
At the top of the page it says Stanford MB Microphones. The MB is the same logo as the MBHO co. At the bottom it says Stanford International with a CA address. Maybe they were the distributor.
