RADIOHAUS RH-DX640 Assembly & Instruction Manual Download | Manualshive

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ASSEMBLING &

INSTRUCTIONS MANUAL

Antena RH-DX640

Cobweb Antenna for portable or

base station operation in

6, 10, 12, 15, 17, 20, 30 and 40 meters

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Summary of Contents for RH-DX640

Page 1: ...ASSEMBLING INSTRUCTIONS MANUAL Antena RH DX640 Cobweb Antenna for portable or base station operation in 6 10 12 15 17 20 30 and 40 meters ...

Page 2: ... 10m band 28000 29700 kHz 12m band 24890 24990 kHz 15m band 21000 21450 kHz 17m band 18068 18168 kHz 20m band 14000 14350 kHz 30m band 10110 10150 kHz 40m band 7000 7300 kHz Braid the cable through the central plastic insulator as above Do the same on both sides 2 Return the remainder of the wire so that it is adjusted according to the frequency of each band above wire hanging dropped NOTE The fre...

Page 3: ... feet oﬀ the ground 14 2MHz Minimum SWR 1 1 Impedance 50 Ohm Conector PL 259 with coaxial cable 50 Ohm Weight 5 5 kg 12 1 lbs Dimension 540 x 540 cm 212 x 212 inches TECHNICAL SPECIFICATIONS Type Omnidirectional Cobweb Reception 500kHz to 50 000kHz 50MHz Transmission 6 10 12 15 17 20 30 and 40 m Wind resistance Moderate to strong winds Mast diameter 38 to 64mm 1 1 2 to 2 1 2 MW and SW reception re...

Page 4: ...kHz Youwillneeda lotof patience preference Rememberthata fewinches canmovethe ressonant frequencymanykHz yourpreferenceandtrytoadjustitinthatsegment ofjust100kHz 28 068 to28 168 kHz Adjust inthe centerof the band In20meter 14 000 to14 350kHz adjustinthesegment of your The3 0 meterbandistheshortestofall Withonly50kHz 10 100 ly100kHz from24 890 to24 990 kHz Afew inchescanmove Incaseofthe12 meterante...

Page 5: ...tening elements 3 Releasable Cable Tie nylon 8 Tube clamp 25mm 1 inch large 24 Snap Rivet nylon 5 16 Startby setting the6 meter band 50 to 54 Mhz Startchecking vethereleasablecabletie furthertowards outsidethecenterofthe youprefer movethecable tietowards theinnerofthecenter cau antenna If thefrequencyisabove54MHz orabovethefrequency In a ﬁrst step check the resonant frequency of each band If it s ...

Page 6: ... thatwhen raisingtheantennaitisnottooclosetoobstaclessuch as This antenna has limited badwidth with an acceptable SWR Thus it is important that you deﬁne which is the preferred segment of operation in each band and try to leave each band adjusted to your preference But you will have abetterresultusing andantennatuner BASIC RULE TO ADJUST Higher frequency Decrease the length Lower frequency Increas...

Page 7: ...upthe4 telescopicﬁberglass masts Keepthemclosedandin Figure 3 Figure 4 Insert each mast until they get close with the limit of the clamps 7 14 Connect a good quality 50 Ohm coaxial cable with the shortest possible length between the antenna and the radio Roll up a ba lun on the coaxial cable itself keeping the coils together with Secure the coaxial cable to the matching box tube with the last tape...

Page 8: ...lation Figure 5 Aluminum plate Side view of the center support already with clamps 8 Repeat the same operation on both ends of all bands from 10 to marking represents the approximate center frequency of each wires about 40 cm 16 over the tube in the inner direction and spacer must be installed symmetrically 2 or 3 holes as shown in photo 4 Do not pull excessively to avoid straining the end of the ...

Page 9: ...o that they are not damaged sembly and disassembly be careful when removing the rivets Photo 1 Detail of the positioning of the small holes placement and removal of the nylon snap rivet A Fix only one hex nylon bolt and nut B Fasten with a releasable cable tie C Thread the rope through the nylon clip and fasten together with the fastening element D Thread the rope through a nylon clamp and secure ...

Page 10: ...ght of the wires it is natural for the tu of the plate Simply screw the mast ﬁrmly band fastening element the larger antenna using a nylon clamp Release all ﬁve ropes The shorter rope must be attached to the Connect both sides respecting the identiﬁcation Pass all the wires inside each of the nylon clamps according to Identify the 5 wire antenna pair 15 17 20 30 and 40m that must be attached to th...

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