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Simple RF Radiation Detector

from Paul Signorelli, W0RW on May 12, 2019
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Simple RF Radiation Detector

You can get a simple RF radiation detector right at your greeting card store at your supermarket.

The electronics inside those “musical” Greeting cards is poorly shielded. They can be initiated with a small handie talkie. If you put your HT on some unused frequency, (Don’t use 146.52, 446.000 or any repeater frequencies) and key the transmitter you will find the most sensitive to your frequency.

My ‘dancing dog’ card is most sensitive at 440 MHz and above. I even used it to check the door leakage on my microwave oven, (don’t put it inside). When it detects RF the card starts playing music and the LED’s start flashing. Happy songs.

Some cards may not start because they don’t respond to your frequency or because you have fried them. If you fry them you buy them.

Paul W0RW

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Simple RF Radiation Detector Reply
by EA4BNB on May 12, 2019 Mail this to a friend!
Is this also correct for the smartphone?
 
RE: Simple RF Radiation Detector Reply
by KB6QXM on May 12, 2019 Mail this to a friend!
Sound like the author has too much time on his hands.
 
RE: Simple RF Radiation Detector Reply
by K9MHZ on May 12, 2019 Mail this to a friend!
Some car alarms would trigger if you happened to key up a 902 MHz rig in a crowded parking lot. I'm sure the technology has moved along by now, but it was a little twist to your QSOs on 900.
 
Simple RF Radiation Detector Reply
by ADDIETORREY on May 13, 2019 Mail this to a friend!
Did MacGyver talk to you about this?
 
Simple RF Radiation Detector Reply
by W6SWO on May 14, 2019 Mail this to a friend!
Good tip! I've got a radiation meter, but it's nice to have an inexpensive backup.
 
Simple RF Radiation Detector Reply
by W6SWO on May 14, 2019 Mail this to a friend!
Good tip! I've got a radiation meter, but it's nice to have an inexpensive backup.
 
Simple RF Radiation Detector Reply
by KA2DDX on May 17, 2019 Mail this to a friend!
This will keep us busy during solar minimum.
 
RE: Simple RF Radiation Detector Reply
by KC6RWI on May 18, 2019 Mail this to a friend!
After you go to the store to check this out, will someone key up their handheld as they pass thru the anti theft pillars at the front doors. I've often wondered how sensitive those pillars are. Probably a lower freq.
 
Simple RF Radiation Detector Reply
by K8QV on May 19, 2019 Mail this to a friend!
I don't get it. RF is everywhere all the time. What is the threshold for this detector? It might be relevant to know the degree of power and the frequency. Of course if you just want to transmit and have a greeting card play a jingle....
 
RE: Simple RF Radiation Detector Reply
by K3UIM on May 20, 2019 Mail this to a friend!
God shot, QV LOL
 
Simple RF Radiation Detector Reply
by KD2HPQ on May 26, 2019 Mail this to a friend!
I see a tremendous practical joke here. Wait until one of the big greeting card holidays when the card aisle is crowded. Key up your HT and watch everybody go nuts.
 
Simple RF Radiation Detector Reply
by LYFAN on May 31, 2019 Mail this to a friend!
So now I have to go to the drugstore and kerchunk the Hallmark aisle to find out which ones really do the best job, huh? "Security, to aisle seven please."
 
Simple RF Radiation Detector Reply
by VE6KK on June 5, 2019 Mail this to a friend!
And you can buy one for a song.
 
Simple RF Radiation Detector Reply
by K7THU on June 19, 2019 Mail this to a friend!
To KC6RWI, maybe 13.56 MHz,it's another "ISM" band. You got me thinking, have to check next time I go to Target!
 
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