[CQ-Contest] TB-wires WPX category

Tom Haavisto kamham69 at gmail.com
Fri Jun 4 09:57:55 PDT 2010

Hi Oleg

Lets see what the rule says:

a) Tribander/Single Element (TB-WIRES): During the contest an entrant
shall use only one (1) tribander (any type, with a single feed line
from the transmitter to the antenna) for 10, 15, and 20 meters and
single-element antennas on 40, 80, and 160 meters.

There is no limit on the number of elements.  I suppose you could
build a 10 element multiband quad, and it would still be fine as far
as the rules are concerned.

The rules do say "with a single feed line from the transmitter to the
antenna".  Where does the feedline end and the antenna start?  If we
assume the antenna starts at the boom, and there is a single feedline
to this point, then it fits within the rules.

If I may add a side note here (my own take on things, and is my
opinion only).  Folks on city lots will typically have one tower with
a tribander on top, and either a single, wire antennas for 40/80 and
possibly 160 or a vertical.  This way, folks of similar capabilities
can see how their station performs against similar stations.  Clearly,
folks with multiple monobanders, and multi-element low band antennas
are excluded from this class.  My take would also be that using
separate receiving antennas (ie beverages) would exclude you from this
call, as you would now have more than a single element for 40/80/160
(one to transmit with, and a second for receiving).

Hope this helps.

Tom - VE3CX

On Fri, Jun 4, 2010 at 11:03 AM, Oleg Skydan <sov1178 at rambler.ru> wrote:
> Hi, All!
> How many elements the tri-bander can have to match this category?
> Another question - the multi-element-multi-band quad antennas are
> very popular in the exUSSR. Usually such antennas use separate feeders
>  for every band (so it looks like use of quads is illegal in this category).
> But some folks think if they put the switching box at the antenna boom it
> will be legal to use such antenna in the TB-wires category (they also think
> that there is no elements number limit).
> Can someone explain what the meaning of the "tri-bander" phrase in the WPX rules?
> Regards,
> Oleg
> 73 de UR3IQO

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