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7 BAND COBWEB ANTENNA FROM 4 TO 20 METERS

OUT OF STOCK AT THIS TIME

7_BAND_WEB.JPG

 

 

NEW  COMPLETE 7 BAND HF COBWEB BASE ANTENNA

BUILT FOR 4- 6-10-12-15-17-20 METER COBWEB

BUILT BY A RADIO HAM FOR RADIO HAMS

This item was retailing at £249.99 at lamco

NOW YOU CAN BUY ONE AT £185.49 + £10.00 standard POSTAGE
You must select the correct option from the postage drop down for your location

THIS IS NOT A KIT IT'S A COMPLETE ANTENNA THAT COVERS 14-18-21-24-28-50 MEG

AND IS PROVING TO WORK VERY WELL ON 70 MEG 4 METERS

total weight 6.4 KG

BUILT TO WITHSTAND 120 MPH WINDS

PLEASE WEAR GLOVES WHEN WORKING WITH FIBERGLASS

NOW WITH HEAVY DUTY CABLE MOUNTING P-CLIPS
OVER ALL SIZE 8'6" SQUARE
MOUNTS TO A 2" POLE
WIND SPEED  WILL TAKE 100 MPH PLUS

POWER RATING 600 WATTS PLUS


THIS COBWEB WAS CUSTOM BUILT BY ME FOLLOWING THE COBWEB REVELED INSTRUCTION
THE ONLY MODIFICATIONS WERE TO THE SUPPORTS THERE ARE NOW FEWER PARTS AND LESS JOINTS
I USE 16MM SOLID ROD NOT 12MM AS THE ORIGINAL HAD
I USED PULTRUDED FIBERGLASS RODS AND TUBES FOR EXTRA STRENGTH
ALL THE OTHER PARTS ARE AS THE INSTRUCTION  I USED TWIN 42 STRAND FIGURE OF 8 CABLE
THE SAME JUNCTION BOX THAT IS SEALED INSIDE AND OUTSIDE AND IT HAS BUILT IN BALUN CHOKE
I USED 6.25MM ALLOY PLATES FOR THE CROSS SUPPORT AND MAST MOUNT
ALL THE U-BOLTS ARE GALVANIZED SO THEY WILL NOT ROT AWAY FITS TO A 2" MAST
THE JUNCTION BOX HAS S0239 SOCKET FITTED SO A STANDARD PL259 PLUG WILL FIT IN
 SO ALL YOU NEED IS TO FEED IT WITH  A RUN OF 50OHM COAX
24 TOP QUALITY CABLE TIES WILL BE SENT TO SECURE THE ELEMENTS TO THE RODS AS IN PICTURE 2

A  LITTLE TUNING WILL BE REQUIRED YOU MAY NEED A FEW SMALL CABLE TIES FOR FINE TUNING THE ELEMENTS
ATU REQ FOR FULL BAND ON 10 AND 6 METERS BUT FULL INSTRUCTION ON HOW TO TUNE WILL BE SENT WITH THE ANTENNA
AS WILL THE CONSTRUCTION INSTRUCTIONS

PLEASE NOTE AN ATU MAY BE REQUIRED FOR SOME BANDS
THE OVERALL SIZE IS 8 FOOT 6 SQUARE
ALL THE ELEMENT DOUBLE GAMA T MATCHES ARE SEALED WITH HIGH QUALITY HEAT SHRINK TO KEEP THE WEATHER OUT
THE COBWEB IS FULLY OMNI-DIRECTIONAL SO NO EXPENSIVE ROTATORS TO BUY
PURE HORIZONTAL POLARIZATION SO VERY LITTLE CHANCE IF ANY OF E.M.C PROBLEMS
YOU GET 6 FULL SIZED HALF WAVE DIPOLES ONE ON EACH BAND WITHOUT NULLS
IN A SPACE LESS THAN 9 FOOT SQUARE
YOU EVEN GET 2 HEAVY DUTY POLE CLAMPS TO FIX TO YOUR SCAFFOLDING TUBE UP TO 2 INCH FOR FAST ERECTION AND NOW ALL NYLOCK NUTS
NOW WITH SINGLE PIECE BOOMS AT 1.44 METERS  AND 2  REINFORCED TUBES IN THE CENTER HUB
THIS WAS DONE AS A RADIO CLUB PROJECT SO SOME OF THE BEST BRAINS IN HAM RADIO WENT INTO BUILDING THIS ANTENNA
AN A.T.U MAY BE NEEDED DUE TO THE SPREAD OF SOME OF THE BANDS COVERED BY THIS ANTENNA AS WITH ANY DIPOLE
I THINK THAT COVERS IT ALL BUT IF YOU HAVE ANY QUESTION PLEASE CONTACT ME VIA EBAY
THE ANTENNA HAS BEEN TEST ON FULL UK POWER LIMITS  BUT WILL HAPPILY TAKE MORE
SO THE FULL UK LIMIT IS NO PROBLEM
ITEM WILL BE SENT PARCEL 48 TO MAKE SURE YOU GET IT .
IF COLLECTING PLEASE CASH ON COLLECTION CONTACT ME VIA THE CONTACT PAGE

please select uk or usa from the postasge option dropdown before you click buy now

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