Par End-Fedz EF-30 Instructions manual

ENDFEDZ

EF-30

30M END FED DIPOLE

ENDFEDZ ARE MONO BAND ANTENNAS. USE ON BANDS OTHER THAN

THE DESIGN BAND WILL RESULT IN SIGNIFICANT COAX RADIATION

AND MAY RUIN THE MATCHBOX

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 suspended 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. The antenna may be suspended
horizontally, vertically or sloping. Portable operation is easily accomplished by
suspending 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 preferably pulling it away from the building
with a guy attached to the end insulator.

4. Tuning is best accomplished 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, the antenna may be tuned just like a dipole. Shortening the far end by 1” will
raise the resonant frequency approximately 50 kHz. Trim or (better) fold the wire back
on itself and wrap to shorten the antenna. Tighten the #10 hardware just enough to
compress the lockwasher.

5. Once you are satisfied 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. 3

SPECIFICATIONS

Polarity: Depends on mounting configuration
Design Z: 50 Ohms
Frequency of Operation: 10.1-10.150 MHz
V.S.W.R. Bandwidth: 200 kHz 1.5:1
Power Handling: 200 watts
Weight: 0.5 lbs
Length: 46’0”
Hardware: Stainless Steel
Connector: Silver/Teflon SO-239
Radiator: #18 AWG Poly Stealth

EndFedz ®

Vibroplex LLC

1001 N. Broadway St.

Knoxville, TN 37917

[phone]

www.vibroplex.com [e-mail]