Is the BL-2 a current balun or a voltage balun?
Rich k2cpe
K2 #1102
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Rich,
It is a current balun in both the 1:1 and 4:1 configurations.
73,
Don W3FPR
Rich Ardolino wrote:
Is the BL-2 a current balun or a voltage balun?
Rich k2cpe
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I made a simple 1:1 receive-only balun for 160 meters by winding 9 bifilar turns
of no. 24 enameled wire on an FT37-77 toroid. I connected a 50-ohm resistor to
the output and my MFJ antenna analyzer to the input. On 1.8 MHz it shows a
resistance of 50 ohms, an inductive reactance of 1 ohm,
To: Elecraft Reflector
Subject: [Elecraft] Balun question
I made a simple 1:1 receive-only balun for 160 meters by winding 9 bifilar
turns
of no. 24 enameled wire on an FT37-77 toroid. I connected a 50-ohm resistor
to
the output and my MFJ antenna analyzer to the input. On 1.8 MHz it shows a
resistance
Vic,
If my calculations are correct, YES you should have a good balun. The
reactance of the 9 turns is 809 ohms (AL value is 884 mH/1000 turns,
inductance for 9 turns should be 71.6 uH) which is more than 16 times the
impedance of an antenna feedline of 50 ohms. Greater than 10 times the line
W3FPR - Don Wilhelm wrote:
If my calculations are correct, YES you should have a good balun. The
reactance of the 9 turns is 809 ohms (AL value is 884 mH/1000 turns,
inductance for 9 turns should be 71.6 uH) which is more than 16 times the
impedance of an antenna feedline of 50 ohms. Greater
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