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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
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