How can I make a miniaturized oscillator (146 MHz) bug to be hidden for Fox hunting practice. If the bug gets damaged or lost, it will be at a minimum cost. Are there any schematics aailable? Thank you.
jerry
ARRL
One way might be to use a can squarewave osc at a 3rd of 146MHz (48.66MHz).... and use a 146MHz bandpass filter to only select the 3rd harmonic of 48.66MHz then a power amp to bost.
But this just a carrier...
JG
martin
On Sun, 26 Nov 2006 15:18:12 -0800, "Bruce Varley" Gave us:
Set your PC date and time correctly, DopeAmongUs.
Made one way back for checking the receiver. I hunted down a standard frequency crystal whose nth harmonic was close to the fox frequency, somewhere around 146 megs. Just a simple oscillator feeding a 146 MHz tank circuit provided quite enough power for it to be detected a couple of hundred metres away.
I'm surprised that foxhunting hasn't gone up-spectrum. A 75cm directional setup on a vehicle is a lot less messy than 2 metres.
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