QRP Club
QRP Station => Antennas => Topic started by: vu2nan on December 27, 2014, 03:42:49 UTC
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This is the antenna I strung up ages ago, when I had hombrewed my vacuum tube transmitter and couldn't wait till I had acquired some coax!
http://nandustips.blogspot.in/2011/02/low-cost-dipole-antenna-for-hf-qrp-rigs.html (http://nandustips.blogspot.in/2011/02/low-cost-dipole-antenna-for-hf-qrp-rigs.html)
73,
Nandu.
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I like it Nandu. Simple,light and cheap! :D
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another secret tip: when you use twin lead electricity appliance wire (the wire which plugs into your 110/220 V sockets), you impedance will be near 50 Ohms symmetric. You only need a 1:1 balun at the end of the wire. ;)
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another secret tip: when you use twin lead electricity appliance wire (the wire which plugs into your 110/220 V sockets), you impedance will be near 50 Ohms symmetric. You only need a 1:1 balun at the end of the wire. ;)
The impedance on the wire you are speaking of would calculate out to around 105 ohms, but still only a 2:1 swr thus a 2:1 balun or transformer would be needed.
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I like it Nandu. Simple,light and cheap! :D
Thanks, OM Dave!
73,
Nandu.
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another secret tip: when you use twin lead electricity appliance wire (the wire which plugs into your 110/220 V sockets), you impedance will be near 50 Ohms symmetric. You only need a 1:1 balun at the end of the wire. ;)
The impedance on the wire you are speaking of would calculate out to around 105 ohms, but still only a 2:1 swr thus a 2:1 balun or transformer would be needed.
Hi OM Joop & OM Richard,
No problem since I've used the antenna with rigs having pi tank output.
73,
Nandu.