Creating RFI/EMI for testing

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Meathands

Well-known member
Joined
Feb 6, 2009
Messages
319
Location
Philadelphia
I'd like to get a feel for how well the various EMI/RFI suppression schemes I blindly implement in every circuit are working. How can I generate some interference?
 
For a long time we would was a "clacker" to test new circuits.

To make a "clacker", start with a robust power-line AC relay. Wire the Neutral to the coil, then connect the other end of the coil to the normally closed relay contacts then through a loop of heavy stiff wire (about a foot or so in diameter) and finally to the Hot wire.  Plug this bay in and ic goes CLACK, CLACK, CLACK.  It generates a huge amount of EMI/RFI.

(I wonder if I still have the engineering test report)
 
Wiring up a dimmer switch next to you test bench?
This is something you'll likely run into if you are setting up to record in different spaces, and can wreak havoc.

 
CRT monitor? Always made a truck load of close proximity noise for me!

A soldering iron nearby -  I used that in interference tests many times.

Maybe a CB radio or some other kind of radio transmitter  :)

Microwave oven!
 
A banjo might make some unpleasant noise!  haha

(I kept waiting for someone to make a banjo joke)

p.s. why were there no banjos on Star Trek? It was the future
 
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