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Hi all,
I'm new to the LF and just starting to play with an
homebrew tuned magloop and my small portable (Tecsun PL-600).
I managed to enable (by means of the soldering iron
:-)) the external antenna jack also for MF and LF on PL-600 (normally it only
works in HF). Now I can connect the pick-up turn of my magloop directly to the
radio but I know it would be better to try to keep it balanced by means of a
balun. Here my problem: magloop simulation (with rjeloop3.exe)
tells the antenna has an impedance of between 500 and 2500 ohms (on
the frequencies it covers, from 280KHz up to 1000KHz). On the other hand, I
don't think the receiver have a 50ohm input. In fact, it is designed typically
for HF random wires and has a JFET input buffer stage that should ensure an high
impedance. Given these conditions, does it still make sense to build a balun? If
yes, how could it be designed in terms of number of turns (primary side and
secondary side), etc.?
Many thanks for any feedback.
Reg's
Daniele
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