[Lowfer] VLF active antenna

[Chris Trask]

Gillis,

>
> Just for telling you that i have build your Complementary Push-Pull
> Amplifier Active Antennas the one with the Complementary Push-Pull Input
> Stage at Fig. 5 and that it work verry well for me, even at 5 farenheit :)
>
> http://www.home.earthlink.net/~christrask/Paper007.html
>
> If i read you correctly the the OIP3 and OIP2 is +44.25dBm and +68.5dBm
> and it can be further improved by way of using higher current devices
> such as the BFQ19 and BFQ149 for the output devices. Have you made the
> OIP3 and OIP2 mesurement with these BFQxx transistors.
> I am on my way to buil an other one and i will probably build it with the
> BFQxx transistor.
>

    Nice to hear from someone who has made these.  I may have made those
measurements with the BFQ19/149, but never updated the paper.  I have an
alternative design that I want to look at, so I'll probably make those
measurements when I get around to it.


Chris Trask
N7ZWY / WDX3HLB
Senior Member IEEE
http://www.home.earthlink.net/~christrask/