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VEC-896 Vertical Antenna Instructions
1
VEC-896 Vertical Antenna
INTRODUCTION
The basic 40 meter quarter wave vertical antenna is 33' tall and requires a reasonably good
ground or counterpoise system to function properly. The usual way to eliminate the requirement
for a complicated and space consuming ground system is to center feed a 1/2 wave (in this
example a 66' tall) antenna.
These problems were solved by combining efficient end loading with a balanced center feedpoint
design. The result is a physically small vertical antenna that gives good performance and does
not require any type of RF ground system.
The reduction in size is accomplished by adding separate loading coils and capacitance hats at
each end of the antenna for the HF bands. The efficient end loading coils are wound on
fiberglass forms. The high quality materials and construction of the HF loading system allows a
maximum power rating of 1500 watts on 40, 20, 15 and 10 meters. The six and two meter bands
are covered with the addition of four quarter wave decoupling stubs on the side of the main
elements.
The power rating of this antenna varies from band to band. The PEP ratings are primarily
determined be the voltage breakdown of the components, while the CW ratings are generally
determined be components heating.
The following chart lists the power rating and the 2:1 VSWR bandwidth of this antenna:
Band Power Bandwidth
CW SSB RTTY
40 m 500 1500 700 40 KHz
20 m 750 1500 1250 250 KHz
15 m 1000 1500 1250 700 KHz
10 m 750 1500 1250 1.0 MHz
6 m 300 750 300 2.6 MHz
2 m 200 300 200 7 MHz
The weight and wind load of this antenna is 15 pounds and approximately 2 square feet
respectively.
Warning:
Improper installation and assembly can be hazardous! Read these
instructions thoroughly before attempting to assemble, install or operate this
product! High power transmitting devices produce voltages that can cause
severe burns or other injuries.
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Inhaltsverzeichnis

Seite 1 - VEC-896 Vertical Antenna

VEC-896 Vertical Antenna Instructions 1 VEC-896 Vertical Antenna INTRODUCTION The basic 40 meter quarter wave vertical antenna is 33' tall and

Seite 2 - Portable Operation

VEC-896 Vertical Antenna Instruction Manual 9  19. Install the short 6-32 screws in the ring of both loading coil assemblies. Do no

Seite 3 - VEC-896 PARTS LIST

VEC-896 Vertical Antenna Instruction Manual 10  24. Use the three wire ties to affix the coax to the antenna as illustrated on the i

Seite 4

VEC-896 Vertical Antenna Instruction Manual 11 Please read the following hints: •••• The normal resonant frequency of this antenna i

Seite 5

VEC-896 Vertical Antenna Instruction Manual 12 If the resonant frequency is lower than your equipment can detect take one spoke off (

Seite 6

VEC-896 Vertical Antenna Instruction Manual 13 20, 15, and 10 Meter Bands Now tune progressively higher frequency HF bands by using t

Seite 7

VEC-896 Vertical Antenna Instruction Manual 14 GROUNDING CONSIDERATIONS Although this antenna is designed to operate efficiently wit

Seite 8

VEC-896 Vertical Antenna Instruction Manual 15 TECHNICAL ASSISTANCE If you have any problem with this unit first check the appropria

Seite 9

VEC-896 Vertical Antenna Instruction Manual 16 VEC-896 Vertical Antenna Instruction Manual Table of Contents: Introduction...

Seite 10 - Important:

VEC-896 Vertical Antenna Instructions 2 CHOOSING A LOCATION FOR THE ANTENNA The best performance on receiving and transmitting will be obtained by

Seite 11 - FREQUENCY AND SWR ADJUSTMENT

VEC-896 Vertical Antenna Instructions 3 TOOLS AND TIME REQUIRED FOR ASSEMBLY The estimated assembly time for this antenna is two hours. Antenna as

Seite 12 - TUNING THE ANTENNA

VEC-896 Vertical Antenna Instructions 4  Quality low-loss 50-Ohm coax with a PL-259 from antenna to transmitter.  Either a SWR meter or Analyzer

Seite 13

VEC-896 Vertical Antenna Instructions 5  1. Prepare a temporary ground-level mounting mast that will permit easy initial testing and adjustment. S

Seite 14

VEC-896 Vertical Antenna Instructions 6  9. Slide the bottom radiator (the one with two sets of holes) over the fiberglass rod with the holes that

Seite 15 - MAINTENANCE

VEC-896 Vertical Antenna Instructions 7  14. Clamp the four long U-channel "L" brackets to the elements 1/4" above and below the c

Seite 16 - TECHNICAL ASSISTANCE

VEC-896 Vertical Antenna Instructions 8

Seite 17

VEC-896 Vertical Antenna Instructions 9  16. Mount the two long stubs by treading a 10-32 x 3/8" nut, 1/2" from the elements threaded end

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