Alpha Delta DX-CC Installatie-opmerkingen - Pagina 3

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The two ISO-RES coils have been coated with very special polyurethane with UV

light block polymer, and require no further coating or protection. A small amount

of coax seal placed around the bare copper ends of the element wires (at the

screws) on the coils would be helpful. When placing any coaxial sealant over the

SO-239 coax connector on the bottom of the DX-CC center insulator, be certain

not to cover the four drains holes provided to allow moisture release! When tying

off the two ends of your DX-CC, allow a small amount of slack (or sag) in the

system. Don't cinch the elements down snug!

TUNING AND OPERATING INSTRUCTIONS

Your ALPHA DELTA DX-CC has been set at the factory for resonance within the

80, 40, 20, 15 and 10 meter bands. With proper installation, you should easily

find the resonance points within these covered bands. The design of the DX-CC

is such that the normal VSWR on 10 meters is approx. 2:1, with the VSWR on

the other bands approaching 1.5:1 at resonance. The VSWR curve on 20, 15,

and 10 meters is usually broad enough, depending upon the installation site, that

fine tuning and trimming on these bands is not normally worth the effort.

Additional radiation efficiency is typically not realized. If VSWR is higher than

specified for you rig, just use an antenna tuner and enjoy the antenna as is! (No

separate adjustment is available for 15 meters since it is a third harmonic of the

40-meter section).

*IF THE USE OF AN ANTENNA TUNER IS PLANNED --- NO TUNING OR

MODIFICATION IS NECESSARY. PUT IT UP AS IS AND ENJOY IT!

*Should the installation be such that it is detuning the DX-CC, we recommend the

use of an antenna tuner to cancel the reactances and achieve normal swr and

resonance.

*We recommend the use of a good, wide range antenna tuner (matchbox) for use

with the DX-CC on the 80M band. Many manufacturers offer such tuners for sale,

or one may refer to any of the "handbooks" for a construct-it-yourself project!

*When installed in the inverted vee configuration, minimum SWR may be

regulated (to a degree) by varying the included angle (apex angle) and the

mounting height. Since each installation offers its own set of variables, this work

must be done on a somewhat "trial and error" basis.

*An open wire "ladder" type feedline (a balanced feedline) may be used with the

ALPHA DELTA DX-CC. Please note on the main diagram the two arrows labeled

"a". The two conductors of your balanced feedline would be needed for such an