a glowing tube - 6sh9p
Radios that glow in the dark…
Monthly Archives: July 2012
TQ2SA relais for RF switching
I tried a cheap TQ2SA SMD relais for RF switching. The circuit was using the 2 switches as one SPDT switch with the unused output connected to ground.
Find some pictures attached. For low power it should be possible to use the relais up to 70cm (ok, 30dB isolation only). On 2m and below it works with good results…
relais side
connector side
TQ2SA-5V_SPDT_insertion_loss
TQ2SA-5V_SPDT_short_crosscoupling
Another 43km Laser trial
During July V/U/SHF contest another 43km laser communication trial with DK5WMA.
Locations were JO60LK and JO60MT during the sunset.
Find a short video taken at my location here:
CQ Loop via Laser de DK5WMA, July 2012, distance 43km
