The FK903 is a really low cost signal source for testing continuity and functionality in cables, amplifiers and relay networks.
The FK903 features two switched audio signals, 500Hz and 1kHz, which are easily recognised against background noise.
The signals may be picked up using our economical FK602 2W amplifier with a speaker or earphone.
Power supply 3V @ 1mA
Signal level 2.6V Max
Dimensions 40.4mm x 40.6mm x15mm
Recommended Housing FB03