More POWER!!!

September 15th, 2013

Transmitter power… Sourced a 2SC1971 VHF MOSFET and have a go at beefing this 100mW to about 5,000! The idea is simple, just stick it on the end with 4 Trimmers for tuning/matching and a few bits of 1mm lighting cable twisted to add some inductiveness! There’s always a bit of satisfaction in manipulating something from an electrical sphere and making it so much more interesting, lighting cable to make inductors or even with plumbing materials, a 15mm copper tube 2 meter JPole I built in 2005 is still up and running and out performs many other commercially produced aerials out there. 5 Watts may seem excessive for a transmitter to extend the audio from one room to another, but what the hell. It’s something to do and if it works I will be designing an antenna based on the highly successful JPole 😉 to resonate on 100 MHz, this should get me to Hastings from where I am (16 Miles). Slight legal issues might become apparent at this point but having driven around the chaotic London Town and been swamped with pirate radio stations left, right and center 😉 (ok the pun more appropriate for AM but hey) that bleed crap over a massive bandwidth and broadcasting day after day without intervention, I’m sure a QRP 20 minute broadcast on the south coast will not even be intercepted, or do you think differently? Of course I will have limited use for such a device, it’s more of a challenge. It will be more than likely I will build it into a box and save it for the apocalypse when I give people hope by transmitting archived episodes of The Archers convincing them they are already dead and nothing worse can ensue.

Entry Filed under: General