CUBEX SKYMASTER III- 3B Manual - Página 7

Procurar online ou descarregar pdf Manual para Antena CUBEX SKYMASTER III- 3B. CUBEX SKYMASTER III- 3B 13 páginas. Quad antennas

Instructions:

unbalanced to balanced and impedance transformation device. It will allow for single feed

line with acceptable SWR while using 3 or 5 bands of operation.

An alternative method of feeding the multi band quad utilizes a remote antenna switch such

as the AMERITRON RCS-8V. When using the remote antenna switch or separate feed

lines for each band it will be necessary to fabricate Co-Ax matching sections from 75 ohm

RG11U cable. See TABLE I

For 10 meters use 68 inches (172.72cm) of RG/11U attached to 10 -meter DRVN. EL. FEED POINT

and any length of RG8/U from the other end of the RG/11U to the transmitter.

For 15 meters, use 92 inches (233.68 cm) of RG/11U attached to the 15-meter DRVN. EL. FEED

POINT and any length of RG8/U from other end of RGII/U to the transmitter. (Note: in many cases

the match is satisfactory feeding directly with 50 ohm cable. It is suggested that you try 50

ohm connection first)

Any excess cable can be coiled and taped together.

For 12 meters use 79 3/4 inches (202.74 cm) of RG/11U cable.

Where a REMOTE SWITCHING SYSTEM is used, one would position the remote unit at a

point on the boom where both 10 and 15 meter matching sections could terminate in the

box. This would eliminate splicing of cables, Baluns are generally not needed and have

proven effective in only a small percentage of unusually rough situations. Fortunately, the

great majority of quad installations perform very satisfactorily without the need to resort to

complicated matching systems, but in an occasional "rare" case of difficulty, the Gamma

Match (either individual or Tri-Gamma) has proven to be a good solution. For Gamma

Match information see Note No. 3 at end of instructions.

The CUBEX matching transformer is an excellent choice for matching the antenna system

to the transceiver. It allows for a single FEED LINE and matches the CUBEX antenna

without the hassle of complicated matching networks.

Good luck and DX –

Cubex Co., Inc.

Cubex SkyMaster Series

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