Alpha-Delta_DX-CC_DX-DD_DX-EE_DX-LB_DX-LBplus_使用说明书手册

ALPHADELTAUNICATIONS.INC.COVER SHEETALPHA DELTA MULTI-BAND DIPOLES;Models DX-CC,DX-DD,DX-EE,DX-LB,DX-LB PLUSPower ratings;MAX output(Assuming SWR at the FEED POINT,not tuner,is 2:1 or less).AlphaDelta tests antennas,in the clear(no surrounding objects),at a height of 35 ft.,as an inverted-V with theends at 10 ft.above ground.Approximate SWRs at 1.5:1,or less,and resonances at our test site,depending on antenna model,are:1810 kHz,3800 kHz,7100 kHz,14,150 kHz,28,300,(Use your tunerfor 15 meters).With different local site conditions your SWR and resonant frequency will vary,which isnormal..Model DX-CC:80 thru 10 meters,1000 watts CW/PEP,ICAS duty cycle.Model DX-DD:same for 80 and 40 meters as Model DX-CC..Model DX-EE:40 thru 10 meters,1000 watts CW/PEP,ICAS duty cycle..Model DX-LB:160,80 meters,600 watts CW/PEP;40 meters,1000 watts CW/PEP,ICAS duty cycle..Model DX-LB PLUS:same as above for 160 and 80 meters,and same as Model DX-CC on 40 thru 10metersIMPORTANT NOTE:All models shown above are limited to 250 watts RF output for continuous key downmodes like RTTY to prevent overheating of components.NOTE:With any attic installation,limit power to 100 watts max,any mode.This will minimize coupling toattic wiring,HVAC ducting and outside aluminum gutters and will minimize RFI to home electronics andburglar alarm systems.In your individual site,even lower power may be necessary.Attic installations willrequire a wide range(10:1)antenna tuner to minimize SWR and broaden out SWR bandwidth.Keepantenna wires as far away as possible(>3 ft.)from the above metal items,and NEVER touching them.Also offset (>2 ft.)antenna wires from any wood roof/attic trusses or roof material so they are not in directcontact.NOTE:Our tests show that the "open coil"design of our ISO-RES (tm)(Isolator/Resonator)coils are themost efficient designs for multi-band operation,and approach mono-band performance.Typical "trap"designs,where the coils are enclosed in a metal or sealed housing,do not show this efficiency and,infact,can show significant losses depending upon the trap design.The ISO-RES (tm)coils have a UVprotective dip on them and require no further coating.Also,remove any bubble wrap or packing materialfrom the coils before installing.Do not apply any other material over them as this will affect the tuning andefficiency.With the "open coil"design it is NORMAL for the frequency to shift with rain,snow or conditionsof high humidity.Just re-adjust your tuner until dry again.This is a small inconvenience to maintain thishigh efficiency design.NOTE:Alpha Delta antennas are designed to be used without a balun.Tests show that HF antennasinstalled less than 1/2 wavelength high (e.g.,less than 60 ft.high on 40 meters.)have earth capacitycoupling which tends to "even out"the pattern.If you have problems with RF on the coax,just wind about8 turns of your coax at about an 8"diameter,tape,and install near the feed point of the antenna.Try tomake the windings as in-line as possible,and not "