Vastly improved design is more powerful than our 3V MTX room bug and slightly more refined than our MMTX 9V room bug. This circuit uses 2-transistors with the tank oscillator coil built onto the PCB for extra stability in operation. There is a choice of two output powers offering a choice of greater range or greater stability.
You can experiment with different aerial set-ups for greater range and alternative inputs (details provided).
Transmits to 500m plus in the open using a 9V PP3 battery
Can be received on a standard FM radio
Highly sensitive built-in electret microphone (instructions supplied show how this can be changed to accept a line level input, low-level dynamic mic or magnetic guitar pickup)
User adjustable transmitting frequency (just requires a small screwdriver)
!! Not for sale in the UK or EU!! Please do not order this item if you live in the EU. The item will be removed from your order and refunded accordingly.
500 metres plus (line of sight using PP3 battery)
6-16Vdc - supplied with 9V PP3 battery clip (battery Order Code 656.020)