Graham wrote: Simple tuner If it works on top band, then it will work on 500 (with a bit more C) .. this is a simple parallel tuner , with a WW2 ex usa surplus transmitter coil, and a 2000 pf capacit
Hello Tim, My ATU is really a large matching coil. It consists of 130 turns of insulated solid copper wire on an 11.5cm dia. cardboard former (carpet roll centre) tapped every ten turns (course tunin
Simple tuner If it works on top band, then it will work on 500 (with a bit more C) .. this is a simple parallel tuner , with a WW2 ex usa surplus transmitter coil, and a 2000 pf capacitor 4 x 250pf w
Follow on from 2008 ... was it that long ago ? parallel , Worked well on rx and would handle up to 25 watts on tx before the plates flashed over ! but easy to make easy to tune , Re hashing the Cap s