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Has the 4 FET input High Z amp schematic been posted to the files section, if so under what heading? Thanks, Mikek

Hi Henry, I just quickly built one up. The gain seems quite low and the IMD performance isn't that good. Current draw is about 10mA, which is quite low. I need to experiment to see if I can further

Dear Fred Please send both papers to me directly.? thanks in advance. best Paul? VE3PVB

Tell me, what you need, i have both papers available. regards, Fred

Hi Paul, Is the link not working?? If not, you can search on the German word "aktiv" in the files section.? If that does not work, you can contact me directly:

Dear Mark can you send me the reference directly to me thanks Paul? VE3PVB

There is also this German design that uses the inductors:? ?"Aktiv empangen mit neuen Ideen" (new ideas for active

Complementary Push-Pull Amplifiers for Active Antennas: A Critical Review by Chris Trask / N7ZWY Sonoran Radio Research P.O. Box 25240 Tempe, AZ 85285-5240 Dan, this paper contains the East German

Thank you, Martin. 73 Andrea IN3IWZ <martin_ehrenfried@...> ha scritto:

Yes, that's the default setting in this group, attachments are removed. Dave, can you add it in the files section please. Regards, Martin

Hi Dave It seems that the attachment has been removed from your email. Thanks for all your contributes! 73 Andrea IN3IWZ [email protected]> ha scritto:

East German???? To what are you referring? As far as I am aware, the LZ1AQ loop amplifier is this one: http://www.lz1aq.signacor.com/docs/wsml/wideband-active-sm-loop-antenna.htm Dan - K3GMQ

Maybe that is why the original East German design had a suitable inductor in the same place Paul VE3PVB

The following items have been added to the Files area of the [email protected] group. * /AG5RT/LZ1AQ amplifier noise reduction.pdf (

After talking with Dave Evans, he noticed that my load resistance slider was at minimum and thought that my radials were too long.? He suggested that I raise and shorten them.? I raised them from on

Dave, I used 36 turns of #32 bifilar turns on a FT75-50 toroid for the 4 JFETs amp. I designed a new board that has a common mode choke on the back side of?the board, which uses a FT84-75 toroid

Since the last email I read on this loop antenna group addressed an E-Field probe preamp and I've read a number of high-Z preamps on this group, I'll contribute in that thread: high-Z input

Hi Martin Have you tried the G4COL design with? transformer in the FET circuit?. Its simple and is supposed to have better large signal handling

Thank you John. That is very impressive for the relatively small size. Thanks to the tips here in the group, I am very optimistic that I will be able to erect an AziLoop with the 13.8 metre