VU2PLL HF HOMBREW MOBILE & PORTABLE VERTICAL ANTENNA

By VU2PLL

(1st time in India)

HF MOBILE AND PORTABLE ANTENNA with remote tuning

3.5 to 30 MHz (50, 145 MHz)

Specification:

Antenna length=47” (without whip), Length 3.5 to 30 MHz (6ft whip) = 108", 7(3.5) to 30 MHz (4 ft whip) =90", Weight =5 Kg. Dias=2’6",

Power=400 W with remote tuning 3.5 to 30 MHz

How To Use:

VU2PLL HF MOBILE AND PORTABLE ANTENNA Tuning is achieved by pressing either the up or down switch and listening for the signals that is peak in strength. This is very noticeable and gets you very close to minimum VSWR. In VU2PLL HF MOBILE AND PORTABLE ANTENNA fine up and down adjustments can be carried out with the radio’s SWR meter. The antenna coil can be tuned to any frequency in the range between 3.5 – 30MHz.

Note:

VU2PLL HF Mobile and Portable Antenna can be connected to all type of Transceivers.

Warning:

Whenever you want to change the Band or Frequency you have to transmit the Low Power in Transceiver.

Then you have to adjust the up or down switch to fine tune SWR 1:1.After that you can Increase the Power.  Or else your Transmitter may get spoiled.

For any enquiry:

Mobile No     :  +91 99425 99313

Land Line No:  0424-2352054

E-Mail Id        : vu2pll@yahoo.com

FB Id               : Shanmugam Vadivel

VU2PLL HF MOBILE ANTENNA

Assemble & Service manual:

How to Assemble and Dismantle Antenna-Guidance:

  

Fig.1

Antenna top mount and Cover are fitted in the coil former .

 In Fig - 6  to 15 & 20 to 28 represents - All Will move upwards and downwards , 2-1/2”  SS Pipe, RF ,DC Connecter box.

 In  Fig.16 to19 & 32 to 42  5/8 th - 5” - Bolt nut is Antenna negative End, Bottom Portion is   Radiating element  in Antenna and it is a Hot end. It is stable .

DISMANTLING ANTENNA:

Step -1:  Mark the position of Screw and other element’s  position in Antenna before   dismantling for assembling the antenna again in correct position.

Unscrew and pull up the Top cover that is Shown in  Fig .8  and Remove the bush  shown in  Fig .9  which is in the coil former

Whether proof cover open screw and lift up and remove Fig.10 to 13

Step -2, contact point Ball,spring,screw & coil , nylon push Fig 14 to 20,35,36

Step-1, step-2=open Top

Step-3. Open cover of connecter box Fig 1,3,3a

Step-4. Open screw 6+2=8 pull down the mount bush Bolt, nut from ss pipe lower radiator

            Fig.1,3,3a,37 to 44

Step-5,  de solder  Dc wire from connector  insert wire inside ss pipe ,Then  open motor               mount screw from ss pipe, and push down coil former top whip mount ( remove all in SS Pipe  bottom  hole via ) Fig.7,14,20 to 35,37

  

Fig .2,

FIG .3

Fig.3a

Fig.4

Fig.5, control circuit for motor , 

Fig.6

Fig.7

Fig.8

Fig.9

Fig.10

Fig.11

Fig.12Fig.13

Fig.14

Fig.15

Fig.16

3mm ss Ball, spring and screw for contact coil to   SS pipe 2-1/2” pipe   

Fig.17

Fig.18

Fig.19

Fig.20

Fig.21

Fig.22, Top element whip mount, push

Fig.23 ,Top element whip mount push 

Fig.24,Top element whip mount push

Fig.25,Top element whip mount push

Fig.26

Fig.27

Fig.28

Fig.29

Fig.30

Fig.31

Fig.32

Fig.33

Fig.34

Fig.35

Fig.36

Fig.37

Fig.38

Fig.41

By VU2PLL

(1st time in India)

HF MOBILE AND PORTABLE ANTENNA with remote tuning

3.5 to 30 MHz (50, 145 MHz)

Specification:

Antenna length=47” (without whip), Length 3.5 to 30 MHz (6ft whip) = 108", 7(3.5) to 30 MHz (4 ft whip) =90", Weight =5 Kg. Dias=2’6",

Power=400 W with remote tuning 3.5 to 30 MHz

How To Use:

VU2PLL HF MOBILE AND PORTABLE ANTENNA Tuning is achieved by pressing either the up or down switch and listening for the signals that is peak in strength. This is very noticeable and gets you very close to minimum VSWR. In VU2PLL HF MOBILE AND PORTABLE ANTENNA fine up and down adjustments can be carried out with the radio’s SWR meter. The antenna coil can be tuned to any frequency in the range between 3.5 – 30MHz.

Note:

VU2PLL HF Mobile and Portable Antenna can be connected to all type of Transceivers.

Warning:

Whenever you want to change the Band or Frequency you have to transmit the Low Power in Transceiver.

Then you have to adjust the up or down switch to fine tune SWR 1:1.After that you can Increase the Power.  Or else your Transmitter may get spoiled.

For any enquiry:

Mobile No     :  +91 99425 99313

Land Line No:  0424-2352054

E-Mail Id        : vu2pll@yahoo.com

FB Id               : Shanmugam Vadivel

 Introduction:

                HF Screw Driver Mobile and Portable Antenna is a compact Antenna that can be used for Wireless Communication Purpose. We can tune it and operate the frequency ranges between 3.5 to 30 MHZ (50 MHZ & 145 MHZ also operated). This Antenna can be easily carried and we can establish it any places and altitudes.

Specification:

Bands                                              :	3.5 - 30MHz
Power Supply voltage & current:	DC 12v 250mA
Max Power Rating                        :	400W (SSB)
Height                                             :	Approx. 45" (Without Whip) Approx. 108" (3.5 MHz – 6Ft Whip) Approx.  90” (3.5 to 30 MHz – 4ft Whip)
Weight                                            :	5 kg (Approx)
Connector                                      :	UHF (PL 239)
Type                                                :	Center loading
VSWR                                              :	Less than 2.0

How To Use:

General:                                                                            

                                                                       

1.       Open the package and take the antenna out.

2.       If you choose the Band or frequency Operation as

v  3.5 MHz to 18 Mhz  - Use 6 Feet Whip   (or) 4 feet 4mm +3feet 3mm =7feet (with joint)

v   7    MHz to 30 Mhz - Use 4 Feet Whip.

v   Use 2.5mm Allen key to tight the Whip Screws (5mm).

3.       You have to fix Antenna using Mount (in Car), Stand (in Portable) or Mast, Tower(Base Station). Use 24 No Spanner to tight the Bolts and Nuts.

4.       Connect the cable (RG-213) from transceiver to antenna. Round the cable as 6 round turns (5” Dia).

                                                   

5.       In cable use PL-259 Connector to connect the cable with Antenna connector-PL-239.

6.       Connect the DC Cable(Above 1 sqmm cable) from Up & Down Switch Control Box with Antenna-DC Connector.

                                                                                   

7.       If VU2PLL HF Mobile and Portable Antenna is visible there will be a particular mark and you have to adjust the Up & Down Switch and make it straight to the mark. Then continue the following steps for further process.

8.       Tuning is achieved by pressing either the up or down switch and listening for the signals that is peak in strength. This is very noticeable and gets you very close to minimum VSWR. In Antenna fine up and down adjustments can be carried out with the radio’s SWR meter. The Antenna coil can be tuned to any frequency in the range between 3.5 – 30 MHz.

Mobile (Car):

·         Fix Antenna using Mount in Bottom Body, Bumber, Toe Hook  or in any convenient portion of Car.

·         Then follow the Points mentioned in General Topic-1 to 8.

Portable:

·         Use Tripod or suitable stand and fix the Antenna with appropriate radials.

·         Then follow the Points mentioned in General Topic-1 to 8.

Base Station:

·         Use Mast ,Tower or fix it over roof, parapet wall using clamps and with appropriate radials.

http://www.repdesign.us/gpage2.html

·         Performance will increase according to the height of Antenna

·         Then follow the Points mentioned in General Topic-1 to 8.

For Best performance:

·         Performance will increase according to the height of Antenna and appropriate radials.

·         Use above mentioned whip for particular band coverage.

·         Use best quality Cables like RG 213.

·         Try to fix the antenna in obstruction free area such that there should not be any interference like Trees, Metals, Buildings etc,..

·         For increasing the receiving performance don’t use unfiltered electronic gadgets nearby like Induction stove, SMBS, etc,..

·         Strictly follow the point 4-General or use Balun 1:1.

Warnings:

·         As there is whip in antenna be aware of electrical line while travelling or parking the car.

·         In case of Base station or Portable maintain some distance from electrical Line.

·         Transmit the low power and tune the Antenna to Minimum SWR using Up & Down switch.

For Enquiry:

Call Sign     : VU2PLL

Name         : Shanmugam.V

Contact     : 9942599313, 0424-2352054

QTH           : Erode, Tamilnadu

Email-Id     : vu2pll@yahoo.com

Facebook   : Shanmugam Vadivel

REPRENCE FROM,

http://www.walkietalkietwowayradios.com/1220/maurice-jones-vk2cd-screwdriver-antenna/

http://www.amateur-radio-wiki.net/index.php?title=Screwdriver_antenna

http://www.k4eaa.com/screwdriver.htm

http://www.marsregionone.org/Tech/AFA1VY/DK3-Apartment-Ant.pdf

http://www.hamelectronicsmagazine.com/scrwantC.html

http://dodropin.org/ka5yix/
http://www.pi4asv.nl/techniek/antennes/screwdriver.html