[Antennas] RE: length of wire

2003年7月11日 14:32:36 EDT

In a message dated 7/11/2003 2:01:09 PM Eastern Daylight Time, 
[email protected] writes:
> Is it possible [when building a dipole] that one length of wire [with a 
> tuner] can be used lets say for 10-40M bands? Or would it be better that 
> each band has its own precise cut length?
>> Hart
>>
To build a multi-band dipole cut the dipole for the lowest frequency you 
intend to transmit on, in this case 40 mtrs, and feed it with 450 ladder line or 
even 300 ohm twin lead. It will have different patterns on each band as 
compared to a resonate dipole cut for each band. another way to do this is build a 
G5RV. <A HREF="http://www.qsl.net/aa3px/g5rv.htm">G5RV</A> this site gives good information as to the construction and make up 
of a G5RV. <A HREF="http://www.qsl.net/k2hq/g5rv.htm">g5rv</A> This site here gives more detail as to construction and 
radiation patterns as well.
Good Luck and BTW I have a G5RV here that is twinlead fed with NO BALUN and I 
love mine and use it 160 (coax shorted and fed as a Marconi)-20 mtrs, 
including the new "60" mtr band.
DE KG4FET Sandor 
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