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Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
The mains earth will work but it increases the chances of rfi to your neighbours
You can connect your TxRx to an atu without co-ax You can connect the atu to the antenna with co-ax or a balanced pair or just a single wire with earth local to the atu. The thing to remember is that any un-balanced line/feeder will form part of the antenna/radiating system, with variable results. I like the 'purist' approach of resonant antenna and balanced feed-line but almost any feed/antenna can be matched to the TxRx with an amu. Roughly speaking, on 80m, just tune for maximum received noise if and swr meter isn't available. Just be sure to have a good lpf or bpf on the output to remove spurious transmissions, and a bpf for receive to filter out broadcast stations etc.
BTW, I didn't notice any entry from you in the Amateur Radio thread ... are you licensed?
Registered Member #3925
Joined: Fri Jun 03 2011, 10:50AM
Location:
Posts: 121
Sulaiman wrote ...
The mains earth will work but it increases the chances of rfi to your neighbours
You can connect your TxRx to an atu without co-ax You can connect the atu to the antenna with co-ax or a balanced pair or just a single wire with earth local to the atu. The thing to remember is that any un-balanced line/feeder will form part of the antenna/radiating system, with variable results. I like the 'purist' approach of resonant antenna and balanced feed-line but almost any feed/antenna can be matched to the TxRx with an amu. Roughly speaking, on 80m, just tune for maximum received noise if and swr meter isn't available. Just be sure to have a good lpf or bpf on the output to remove spurious transmissions, and a bpf for receive to filter out broadcast stations etc.
BTW, I didn't notice any entry from you in the Amateur Radio thread ... are you licensed?
ahh right,
i shall connect the tx to the atu with coax, and the antenna to the atu directly (there is a screw connection for long wire antennas)
the atu has an inbuilt swr meter :) right...
yeah i am i have foundation license, but ive gotta wait till i get intermediate to use homebuilt transmitters xD haha well i only recently got the license (december 2011), so there is nothing much to say really... :)
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most efficient 80m antenna?
