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Founded in 1990

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SIGMA EURO-COMM HF AM-PRO Mini Dipole 40m 7.1 MHz

Free UK Delivery - On selected products

Over 30 Years Experience - Est 1990

Born in the heart of Birmingham!

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Description

Main Description

EU CUSTOMERS

PLEASE NOTE:  FROM JULY 1ST 2021 THE EU INTRODUCED NEW VAT RULES FOR THE IMPORT OF GOODS FROM OUTSIDE THE EU.  WE ARE A UK BASED COMPANY.  THIS MEANS THAT AFTER THIS DATE, IF YOU LIVE IN AN EU MEMBER STATE YOU WILL NEED TO PAY THE VAT BEFORE YOUR NEW ANTENNA IS RELEASED FROM CUSTOMS.  PLEASE ALSO NOTE THAT IF YOUR ANTENNA IS OVER 150 EUROS YOU WILL ALSO FACE A SMALL COURIER ADMINISTRATION CHARGE. 

PLEASE NOTE THAT CARRIAGE COST IS BASED ON UK MAINLAND ONLY.

ALSO, SOME SCOTTISH HIGHLAND POSTCODES ARE ALSO EXCLUDED.

PLEASE CONTACT US BY EMAIL FOR DELIVERY COSTS TO NORTHERN IRELAND, THE CHANNEL ISLANDS, THE SCOTTISH ISLES AND THE SCOTTISH HIGHLANDS BEFORE PURCHASING.


CUSTOMERS FROM ISLANDS AROUND THE WORLD (E.G CARIBBEAN, BALAERICS, CANARIES, COUNTRIES NOT CLASSED AS AMERICAN MAINLAND, EXTREMELY REMOTE AREAS ETC.) PLEASE CONTACT US FIRST FOR DELIVERY COSTS SO THAT YOU CAN GET AN ACCURATE COSTING


Sigma Euro-Comm HF AM-PRO MINI DIPOLE 40m

These consist of two Pro-HF mobile whips for the band of choice, a short stub mast fitted with a dipole centre and a fixing bracket.

Loosen the grub screws at the top of the loading coils and slide the whips in to the point where the black ring is marked on them and tighten the grub screws with the supplied alan key.  Screw the two completed whips into either side of the dipole centre. A 13mm spanner may be necessary to ensure they are tight.  Also attach your coaxial cable (50ohm) to the SO239 socket.

Using either an antenna analyser, or your transceiver with a SWR meter, adjust the whips to tune on your favourite spot.  The bandwidth may be rather narrow so choose for your favourite mode – the CW portion will be near the black mark the DATA portion a little higher up the band and the phone portion even higher.  Remember that the shorter the antenna, the higher the resonant point.  As it is a balanced dipole antenna remember to adjust each side equally. Use of an external ATU can extend the tuneable

range / bandwidth of the antenna.


Once you have your match, fit the stub boom and antenna to your mast using the supplied clamp and raise it up to operating position.  This is also suitable for loft mounting.

The 40m (7MHz) version will also be resonant on 15m (21MHz) (third harmonic).

SIGMA AM-PRO 40 Meter HF Antenna


Specifications

    Power handling 250 watts

    Length  5 Meters / 16 feet 4 inches (Approx)

    Impedance 50 Ohms

    Frequency 7.1 MHz

    SWR 1.5:1

    Whip 17.7 ph stainless

    Fitting 3/8 UNF

    Made in Great Britain

 


Welcome to Sigma Euro-Comm Limited

We pride ourselves on customer service and producing high quality products; with Paul still overseeing the production of all products onsite at our Birmingham factory.

Our reputation is key to our success and we're grateful to have so many loyal customers that return to us time and time again.

If you would like any further information on any of our products or would like to discuss becoming a trusted trade partner, please complete the 'Contact Us' form and we'll be happy to assist in any way we can...

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