LF: Re: ferrite antenna

["mal hamilton" <g3kevmal@talktalk.net>]

correction

1500 nF should read 1.5 nF

de mal/g3kev

 

----- Original Message -----

From: mal hamilton

To: rsgb

Sent: Friday, September 30, 2011 4:13 PM

Subject: LF: ferrite antenna

LF

I made an effort today to resonate my ferrite antenna

906 uH /1500 nF approx for 137 Khz, no preamp so far, no suitable Fets available. I am getting reasonable reception with the antenna indoors and with a 20 dB gain amp I am sure it would be excellent.

The package contains 9 ferrite rods displaced around a bakelite rod, total diamater 45mm and length 100mm. The rod bundle is ex commercial atu and material unknown. Wire is 1mm enamel cu. Rx is Siemens level meter D2155.

I have no link winding, connection to RX is direct to the main coil winding.

If and when I get time I will wind an air core of similar inductance and compare the sensitivity against the ferrite core coil.

73 de mal/g3kev