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ENDFEDZ EF-10
*Patent Pending*
10M END FED DIPOLE
PARTS LIST
PART NO. QTY DESCRIPTION
SUB28001 1 10 METER EF MATCHBOX
2819 1 10M RADIATOR 16’ 7”
2820 1 10M TUNING STUB
1403 1 END INSULATOR
14417 1 #10 SPLIT RING LOCKWASHER
2814 1 #10 STAINLESS HEX NUT
2815 2 #10 STAINLESS FLATWASHER
32767 1 SHIPPING BOX
2821 1 EF-10 MANUAL
ENDFEDZ ARE MONO BAND ANTENNAS. USE ON BANDS
OTHER THAN THE DESIGN BAND WILL RESULT IN
SIGNIFICANT COAX RADIATION AND MAY RUIN THE
MATCHBOX
FIG. 1
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ASSEMBLY
1. This antenna is essentially a half wave dipole with one important difference– the feedline
is at the end of the antenna. The antenna is su spended at its ends by the two included end
insulators– one of which is integral to the matchbox.
2 In order to have the least possible influence on the antenna, insulated lines are
recommended for attachment to the insulators. T h e antenna may be suspended horizontally,
vertically or sloping. Portable operation is easily accomplished by suspend ing the far end from
a tree limb and letting the matchbox hang just above the ground.
3. The antenna has been used from hotel rooms by hanging the matchbox end just outside the
window and letting the far end hang, or pr eferably pulling it away from the building with a
guy attached to the end insulator.
4. Tuning is best accompl ished by using an antenna analyzer attached to the far end of the
coaxial cable that will be used with the antenna. Once the initial resonant frequency is
established, t he antenna may be tuned just like a dipole. Shortening the far end by 1” will raise
the resonant frequency approxi mately 100 KHz. If too much wire is removed, the included
tuning stub may be attached to the 10-32 stu d a t the matchbox end and trimmed to establish
resonance to the desired frequency (Fig.2). Fine tuning may be accomplished by c hanging the
orientation of the stub with regar d to the main radiator (I.e. rotating the stub and retightening
the hardware. Tighten the #10 hardware just enough t o compress the lockwasher
5. Once you are satisf ied with the overall length of the radiator, lace the wire through all three
holes in the insulator as shown in Fig. 1.
6. Fig. 3 illustrates some mounting ideas.
Fig. 1
Fig. 2
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GUY
RADIATOR
GUY
COAX
RADIATOR
COAX
GUY– IF NECESSARY
INVERTED L
SLOPER
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EF-10
TYPICAL
V.S.W.R. PLOT
SPECIFICATIONS
Polarity: Depends on mounting configuration
Design Z: 50 Ohms
V.S.W.R. Bandwidth: 700KHz 1.5:1
Power Handling: 100W
Weight: 0.5 lbs
Length: 16’ 7”
Hardware: Stainless Steel
Connector: Silver/Teflon SO-239
Radiator: #14 black poly coated Flex Weave
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