AMAZING NEW “LISTEN-IN-COIL” (Jan, 1964)
Filed under: Advertisements — @ 8:24 am
Source: Popular Science ( More articles from this issue )
Issue: Jan, 1964
| Buy on Ebay
Source: Popular Science ( More articles from this issue )
Issue: Jan, 1964
| Buy on Ebay
AMAZING NEW “LISTEN-IN-COIL”
PICKS UP ANY TELEPHONE CONVERSATION!
NO CONNECTION TO TELEPHONE NECESSARY!
Simply place Super-Sensitive LISTEN-IN-COIL in vicinity of telephone Picks up voices on both sides of telephone conversation Easily conceited. Wonderful fun Hundreds of practical uses
• RECORD CONVERSATIONS?
Amazing “Listen-In-Coil” can be used to RECORD entire telephone conversations!• PLAY TELEPHONE THRU RADIO!
Also plays telephone conversations thru from smallest TRANSISTOR to biggest CONSOLE!MONEY BACK GUARANTEE
Save COD fee and send Check Cash or M O to: Consolidated Acoustics Dept 87, 1302 Washington St Hoboken N.J.
2 cans and a string?
Comment by Stannous — September 22, 2007 @ 9:06 am
Haha, no, it’s likely based around something called a “pickup coil”–basically a reverse electromagnet. When subjected to an electromagnetic field (like, say from the speaker in a telephone), a small current is induced in the coil. Hook this up to an amplifier or a transmitter and, taa-daa, you can hear electricity! Like the ad says, this enables you to hear the voice signals inside phones and such. I actually have a little pocket-sized one that I use as a sort of stethoscope for electronics. Put it near different parts of a computer and you can actually hear the data!
Comment by Jake of All Trades — September 22, 2007 @ 4:27 pm
Of course, it’d work better if she weren’t holding the telephone receiver upside down.
Comment by Blurgle — September 23, 2007 @ 8:46 am
Blurgle-
Great sight’em!
Comment by Stannous — September 23, 2007 @ 8:43 pm
Yay! It’s so much fun to violate other’s privacy; you never know what you’ll hear next!
…While I sat in my lonely apartment playing back recordings of other people going about their lives, it never occured to me that I’d never gotten a life of my own, unless being a hermetic sleazeball or a for-profit parasite counts as a life…
Comment by Village Idiot — October 4, 2007 @ 6:41 am