40s Ultra Mike AM braodcast microphone for tube radio

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Source eBay

ULTRA-MIKE by MERCURY ELECTRONIC LAB CHICAGO ILL USA. This thing is in great cosmetic condition with minimal normal wear to the paint and in working order. When plugged in the tubes and the light bulb light. If you tune an AM radio to a blank spot on the dial and fiddle with the frequency tuning knob while tapping on the metal mike cover until you hear the noise through the radio, with some fine tuning you can talk into the mike and it will broadcast to your radio with marginal success, sounds a little fuzzy but it was truly a fantastic concept in the day. I have posted a lot of pictures of this item to help answer your questions. This is an AM portable, short range broadcast microphone that is post war I believe, due to the tube size. T are 2 (one on each side) JRC-9003/VT-203 tubes and various resistors and caps. T is a carbon? microphone on one side, an on/off switch and a frequency tuning knob. The line cord is original and t is a long antenna wire. As you can see the mike comes off the base to be hand held. When mounted on the base it is approx. 7" tall and 5" wide. This is a great addition to your vintage or antique tube radio stuff. And as far as I can tell it is truly rare to find one of these is working order in this lightly used condition. T was a banner on the top plate that said ULTRA_MIKE that is unfortunately missing, read more

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