Antenna Products

Bullet End Fed Antenna Matcher (9:1) - 500 watts PEP, 1.8-61 MHz

Bullet-9U

Bullet End Fed Antenna Matcher (9:1) - 500 watts PEP, 1.8-61 MHz Bullet-9U

Bullet 55 Configuration 2 png - Antenna Products

The “Bullet” End Fed Antenna Matcher

The key to end fed antenna success is the matching network interface between the long wire antenna and the coax feed line and feed line choke at the transceiver. Palomar Engineers employs a dual core matching system that offers wide bandwidth (1.8-61 MHz), 500 watt PEP rating, and a connection for a counterpoise or ground if desired.

The antenna can be used as a sloper, “L” with a vertical section and a longer horizontal section, or as a random horizontal antenna between two trees or supports.

Our network matching network is called the “Bullet” because of it

shape and its effectiveness at taking down or contacting distant (DX)

stations all over the world under the right conditions. The Bullet uses

all stainless steel connectors and a dual core ferrite 9:1 unun for higher power rating then many competitive products.

We sell the Bullet separately so you can add you own wire type and length (see table of suggested lengths below) or you can purchase a complete antenna system including wire and end insulator.

For best results we recommend that the coax feed line be at least 1/4 wavelength on the lowest operating frequency since the coax braid is used as a counterpoise if you don’t use the external counterpoise terminal on the matching unit. We also recommend a feed line choke at the end of the coax feed line near the radio to prevent RFI common mode current from interfering with the radio – check out the info below on feed line chokes.

For best results we recommend that the coax feed line be at least 1/4 wavelength on the lowest operating frequency since the coax braid is used as a counterpoise if you don’t use the external counterpoise terminal on the matching unit. We also recommend a feed line choke at the end of the coax feed line near the radio to prevent RFI common mode current from interfering with the radio.

Suggested wire lengths (measured from Bullet feed point):

Bands Covered (meters)


Wire Length (feet)

Minimum Coax Length (feet)

40-30-20-15


35-43, 49-63, 70-85

35

40-30-20-17


35-45, 54-64, 67-77

35

80-40-30-20-17-15-12-10


38-44, 55, 60, 68-73

50

80-40-30-20-17-15-12-10


68-73, 85, 92, 102, 120-125

65

160-80-40-30-20-17-15-12-10


135, 141, 173, 203, 218, 268

130

If you run more than 500 watts PEP and need a high power 9:1 unun for your end fed antenna, check out the 1-7.5KW PEP ununs.

Installation

For best results raise the Bullet matching unit as high as possible (use a tree or vertical support) and then extend the antenna wire horizontally or as an “L” (horizontal with vertical end drop). The antenna may also be deployed as a sloper with the Bullet matching unit at the top (best) with the wire sloping toward the ground (with the end high enough to avoid contact by humans or animals), or at the bottom of the sloper with the antenna wire rising to a higher point (see typical configurations below).


Additional Typical Antenna Configurations:

Bullet Configurations png - Antenna Products

Another popular configuration that works for portable or stealth installations is shown below:

Bullet 55 Configurations 2 jpg - Antenna Products

Antenna Length Modifications: For best results, chose a length from the table above as these lengths will form a non-resonant antenna for the amateur bands indicated.The antenna length should NOT be ¼, ½ wavelength on any frequency that you transmit as the impedance will be very high (or low) and will not transfer through the matching unit at a favorable impedance to your antenna tuner.The theory of the antenna length is to make the antenna non-resonant on any amateur band so that the impedance at the antenna side of the matching unit is in the range of 200-600 ohms and when divided by 9 will be in the range of your transceiver antenna tuner.

Any length of 50/75 ohm feed line ok (over 35 feet minimum) but longer feed lines over 50 feet may show reduced SWR on some bands due to soil conductivity, nearby objects, etc. Due to local ground conditions, antenna height and feed line length, SWR may vary and an antenna tuner may be required or some bands to bring SWR at end of feed line to acceptable levels.Use of one or more ¼ wavelength counterpoise(s) connected to the ground post of the matching unit may also improve antenna efficiency and reduce SWR on certain bands.The first counterpoise should be installed under the horizontal portion of the antenna for best results

Use a good quality 50/72 ohm cable adequate for the power level of your station.The Bullet-80 matching unit is rated for 500 watts PEP for SSB and 150 watts continuous carrier for AM, FM, digital modes, or 375 watts CW. If the matching unit becomes warm to the touch after transmitting at high power, reduce the power output or the internal matching unit may become damaged.

NOTE: due to the nature of antenna systems and the modifications many users perform and the transmitter power levels that may be applied higher then the specifications, the antenna systems are NOT RETURNABLE unless they are unused, in the original packing with the original invoice and a return request is made withing 30 days of original purchase.

$59.95 In stock
Brand:Palomar Enginees
UPC:Does not apply
MPN:Bullet-9
Type:NEW
Country/Region of Manufacture:USA
Bullet End Fed Antenna Matcher (9:1) - 500 watts PEP, 1.8-61 MHzBullet End Fed Antenna Matcher (9:1) - 500 watts PEP, 1.8-61 MHz
Palomar antenna products include feed line chokes, feed line to antenna matching transformers, static bleeders and other accessories. Click on the link to connect to the product you need.