[Adjustable Sensitivity] RF signal detector with 5 levels of adjustable sensitivity, increase sensitivity to expand the detection range, reduce sensitivity to shorten the detection range, faster to find the source of radio waves.
eBay
An original key design for the active Amateur Radio operator. U.S. patent number 107589. dated on or about 1934. The "bug" key represents a retro look back. Bug Keys are designed for 20-50 WPM operation giving the code.
eBay
eBay
The Bug HLG. This is set of R/C airplane plans, printed full size and ready for your next scratch build. If you would like anything printed to a different size / wingspan I am happy to do so. I can enlarge or reduce the size to any size you'd like.
eBay
Detect whether there are suspicious radio signals. Optical Lens: Special filter. 10cm-10m/3.9in - 32.8ft(red light flashing can be recognized by eyes). 1 x USB Cable. 1 x Earphone. Material: ABS. Receiving Frequency Range: 1MHz-6500MHz.
eBay
Feature: 1. Multi Function Detector: Support wireless signal detection, positioning detection, anti eavesdropping and more. Item Type: Wireless Signal Detector. Detection Range: Wireless 2.4GHz: 30-100cm, wireless 1.2GHz: 30-200cm.
eBay
This is a 1966 ad for a General Motors!
eBay
The Bug HLG. This is set of R/C airplane plans, printed full size and ready for your next scratch build. If you would like anything printed to a different size / wingspan I am happy to do so. I can enlarge or reduce the size to any size you'd like.
eBay