Thanks for the link. Just ordered parts. Talk about cheap! Mouser electronics had all of the TO92 parts. Regards Paul.
On Fri, Aug 26, 2011 at 3:27 PM, Poul-Henning Kamp <[email protected]>wrote: > In message <[email protected]>, Brooke Clarke writes: > > >You might consider the AMRAD active antenna that they designed for the > >136 kHz ham band. > > If you want to build an active monopole, Chris Trasks "secret" design > is far better and far more manageable than the AMRAD: > > http://www.home.earthlink.net/~christrask/Paper007.html > > I built this one with BFQ19+BQ149+J174+J310 all in SMD parts. > > (J270 is a better choice than J174 which tends to forward bias) > > With my primitive measurement methods, it was flat to 100 MHz > and tapered off just short of 800MHz. > > In the other end it reliably pulls out the Russian ELF (OMEGA like) > navigation system down around 10kHz. > > Chris mentioned that a kit might be underway, but I havn't seen > any sign of it anywhere... > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > [email protected] | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
