Plug and play. Reliable. Pure solid state, no software.
Narrow 38x130 mm
Double sided PCB,
Fits inside a 20cm long 50mm dia. PVC sewage pipe.
All wired components, no SMD, clean RF-design.
Xtal oscillator unit for adjustment-free, accurate and stable carrier freq.
Two three position slide switches, for setting of the tone frequency and the
Up to 9 different combinations.
The range is abt. 300m when at 1.5m height, with a 1m long wire as antenna,
and a 1m long wire as counter poise.
Also useable with a short whip, and a grounding pin.
Range adjustable by changing the antenna length.
Includes a simple Hi-Z antenna tuner, and LED tune indicator.
100% AM tone modulation + carrier switching, 50% duty cycle, for low power
consumption, and easy reception when its received signal is weak.
Mean current consumption abt. 40mA @ 6 to 9 Vdc. (peak values 70 / 13 mA
whith modulation on / off).
Stable operation until the battery becomes really empty (5.5 V).
Up to 5 hrs operation with 9V alcaline battery.
Clean output, with output filter for 2nd harmonic = -60 dBc,
Pse read "Assembling".
This 130 x 38 mm factory made PCB is