That was back when most TVs where unshieled and the channels where in
the VHF-low and VHF-mid bands, so simple little jammers would work.
You'd create a bunch of pulses using fast-rise times then isolate and
amplify which ever harmonic landed on the channel you wanted to jam, or
just make a free-running oscillator near the same frequency.
Those 555 timer EMP devices can work, but only at a very, very short
range - you basically have to place the target device inside the pulse
loop. They only work on things like clocks or calculators. I want to
make a high power version someday to jam the sync frequencies on video
Quoting j5_lowe <j5_lowe@...
> Steve Wozniak used to roam around with a tv jammer for fun in his
> college days
> =) Days of antenna tvs.
> Although a recent BBS digging got me Dr.Rat's 7404 based device and also a
> 2n2222 schematic.. both of them were not working (no surpise
> here)... I have a
> digital tv.
> Question here: Woz's jammer worked on crt exploit or was it an rf exploiting
> P.S:- After my prior EMP posts ,i stumbled upon this schematic but
> even its not
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