Palomar PAL-OCF1606 Product Manual

160-6 meter double nested off center fed antenna

Product Manual

160-6 Meter

Double Nested Off Center Fed

Antenna

Part#: PAL-OCF1606

OCF antennas are very convenient as they will allow multiple bands of operation with a simple wire antenna

which is fed off center. Rather than feeding the conventional 33%/67% we like the 29%/71% feed point

wherein the feed point is 21% from one end and fed with a 4:1 OCF Current balun with built in feed line choke

(Palomar part# CB-4-1500OCF).

For the PAL-OCF1606 the short side is 49.9 feet and the long side is

184feet. The 40/20 meter resonator stub allows choice of 40 meters at low SWR or 20 meters at low SWR. As

originally shipped the stub is adjusted for minimum 40 meter SWR.

Installation

For best results support center at 30+ feet and ends over 15 feet. Angle of feed each side must be greater than

45 degrees or 120 – 180 degrees total between each side preferred. Any length of 50 ohm feed line ok but

longer feed lines over 50 feet may show reduced SWR on some bands due to losses in feed line and soil

conductivity, nearby objects, etc. Due to local ground conditions, antenna height and feed line length, SWR

may vary from samples shown and an antenna tuner may be required or some bands to bring SWR at end of

feed line to acceptable levels. Use a good quality 52 ohm cable adequate for the power level of your station.

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Table of Contents

Do you have a question about the PAL-OCF1606 and is the answer not in the manual?

Page 1 21% from one end and fed with a 4:1 OCF Current balun with built in feed line choke (Palomar part# CB-4-1500OCF). For the PAL-OCF1606 the short side is 49.9 feet and the long side is 184feet. The 40/20 meter resonator stub allows choice of 40 meters at low SWR or 20 meters at low SWR. As originally shipped the stub is adjusted for minimum 40 meter SWR.
Page 2 The PAL-OCF1606 is rated for 1500 watts PEP at 30% duty cycle for RTTY, AM, or other continuous modes. The PAL-OCF1606HP and PAL-OCF1606EHP are rated for 3KW and 5KW PEP respectively. To adjust the antenna for minimum SWR on 20 meters (rather than 40 meters), adjust the 40/20 stub by removing 6 feet of length or fold back 6 feet of length on itself to fine tune.