AMAZING NEW “LISTEN-IN-COIL” (Jan, 1964)

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.

5 comments
  1. Stannous says: September 22, 20079:06 am

    2 cans and a string?

  2. Jake of All Trades says: September 22, 20074:27 pm

    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!

  3. Blurgle says: September 23, 20078:46 am

    Of course, it’d work better if she weren’t holding the telephone receiver upside down.

  4. Stannous says: September 23, 20078:43 pm

    Blurgle-
    Great sight’em!

  5. Village Idiot says: October 4, 20076:41 am

    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…

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