Off Center Fed (OCF) Antennas

Bullet 50:200 (4:1) HF Balun, 1.8-61 MHz, 500 Watts PEP, Loop, OCF, ZEPP

Bullet-4B

Bullet 50:200 (4:1) HF Balun, 1.8-61 MHz, 500 Watts PEP, Loop, OCF, ZEPP Bullet-4B

The Bullet-4 is a dual core balun with a compact enclosure (looks like a bullet) enclosure that is lightweight and easy to transport for your portable loop antenna solution. Halyard hoist at top of balun for convenient attachment point. Input is via SO-239 coax connector and output with side eye bolt output. Rated 500 Watts PEP Watts from 1.8-61 MHz.

This transformer requires a feed line choke to isolate the coax feed line from the antenna. A coax noise filter at the radio end of the coax is also recommended.

Vertical Delta Loops

Multi-band vertical delta loops can be oriented several way but the most popular is to have the “pointy” end at the top (usually a single support) and the lower horizontal ends just out of reach of humans and animals. Best feed point at the top for multi-band use.

Single band vertical delta loops are best fed 1/4 wavelength (246/f(mhz)) from the top point down one side. Vertical delta loops use the same 2:1 baluns as the horizontal loops.

NOTE: We rate our Bullet baluns (and ununs) VERY conservatively at 500 watts PEP with a 50% duty cycle. Some manufacturers selling low cost baluns may use a 5% duty cycle for their PEP rating to make it appear you get a higher rated balun for a lower price, but you may in fact be getting be getting less. Their 1500 watts PEP really means 75 watts continuous or 150 watts at a 50% duty cycle compared to our 250 watts at 50% duty cycle. Our baluns typically cover a larger frequency range under 2:1 SWR which make your transceiver happy and probably will last longer with less electrical stress.

Remember we over engineer our products, to out perform our competition - just compare the weight of our baluns to theirs and you will know we put much more into our products so you don't have to worry about failure at a critical moment.


$64.95 In stock
UPC:Does not apply
Brand:Palomar Engineers
Model:Bullet-4B
MPN:Bullet-4B
Frequency Band(s):160-6 meters
Country/Region of Manufacture:USA
Type:NEW
Input ohms/Output ohms:50 in, 200 out
Frequency Range
PEP Power Rating (watts):500
Select Output Connector Eyebolts (2) side, 1 on top for hoist (5) Top studs (2) with wing nuts (0)
OCF antennas are very convenient as they will allow multiple bands of operation with a simple wire antenna which is fed off center with a 4:1 OCF Current balun with built in feed line choke,