16-11-2017, 01:39 PM
Hey Wayne,
do you know anyone with one of the old / scrapped CODAN lunchbox radios (6924 I or II) the load control in there is a tapped / stepped rf transformer that is ideal for matching verticals. Of course be aware it is designed for LOW power but using it as a ready made test device is a good start. (then build a bigger QRO version)
I used one of these out of a 6924 at the bottom on my mobile HF whips and even on Rx the right choice of the tap point showed improvements in receiver noise .. hint, position 5 is about 1:1 impedance.
Peter, vk5pj
do you know anyone with one of the old / scrapped CODAN lunchbox radios (6924 I or II) the load control in there is a tapped / stepped rf transformer that is ideal for matching verticals. Of course be aware it is designed for LOW power but using it as a ready made test device is a good start. (then build a bigger QRO version)
I used one of these out of a 6924 at the bottom on my mobile HF whips and even on Rx the right choice of the tap point showed improvements in receiver noise .. hint, position 5 is about 1:1 impedance.
Peter, vk5pj