Parts List - Components Not Listed On The Schematic
D2 - D3 = 1N4005 (x2)
Antenna: 13 " of small diameter stranded insulated wire.
L1 and L2 are identical, air wound, using # 22 magnet wire. 3 turns wound on the smooth end of a 1/8 drill bit. wind the turns on these two coils tight against each other.
Adjustable capacitor C1 is a 2 to 20 pf
Z1 is a 5.1 zener diode
Alignment of the unit after initial assembly and when the battery is connected. The device will come up at around 202 mhz, TV Band 2.
Turn your TV-2 band receiver on. To raise its frequency, spread the turns of L1 only. Once you have set its frequency using either your receiver or a frequency counter, adjust C1 until maximum radiation is indicated on either a field strength meter or some form of bug sniffer. The device has a top end frequency of about 230 mhz with coil L1 spread "very wide."
(C) 2017 Bugplan.Com