Off Center Fed (OCF) Dipole Baluns

3361390764 - Off Center Fed (OCF) Dipole Baluns
+3

160-10 Meter Loop Antenna System with 4:1 Balun and Choke Combo, 1.8-30 MHz, 1.5KW/5KW PEP

PAL-LOOP16010-500
$289.95
In stock
1
Product Details
MPN: PAL-LOOP16010-500, PAL-LOOP16010-1500 or PAL=LOOP16010-5000
Country/Region of Manufacture: USA
Input ohms/Output ohms: 50 in/200 out
Frequency Range < 2:1 SWR (MHz): Balun rated at 1.8-61 MHz for 1.5KW, 1.8-31 MHz for 5KW
PEP Power Rating (watts): 1.5KW5KW
Input Connector: SO-239
Output Connector(s): Eyebolts/Wing Nut
Hardware Type: Stainless Steel
Enclosure Size: 4"x4"x 2"(1.5KW), 6"x 6" x 4"(5KW)

160-10 Meter Loop antenna (558' wire) + 1500 or 5000 Watt PEP rated 4:1 Current Balun + internal 1:1 Current Balun in one enclosure + 6 insulators for support

* Complete package - just add coax

* works multiple bands with ease

* can be configured as delta, square, rectangle or multi-sided horizontal loop (6 insulators included)

* Choice of 1.5K, or 5KW PEP rated baluns to suit power needs

* No need for extra feed line choke as it is built into the 4:1 balun enclosure

After many requests we have created a compact, special balun for OCF and loop (Skyloop or Delta loop) antennas. The CB-4-1-1500 is a CUBE enclosure containing a multi-core, broadband 4:1 impedance transformer in series with a 1:1 current balun for extra common mode current choking to keep RF current off the outside of the coax braid and on the antenna where it belongs. The extra choking action also means that the coax feed line will not act as a radiator causing unnecessary RF interference (RFI). Rated for full 1500 watts PEP and 450 watts CW (ICAS). 1.8Mhz – 61 MHz.


5KW is in 6" x 6" x 4" enclosure. 1.5KW is 3 pounds, 5KW is 5 pounds.

ADD MC-1-3000 Choke for radio end of coax to reduce common mode noise on coax up to 6 "S" units!

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Testimonial

Hi Bob,

Radio: Flex-6700 running barefoot -10 to 100 Watts max.
Antenna: MFJ-1216 – 160/80 meter OCFD wire antenna with matching network.
Elevation: Over 60 feet AGL – fully extended.
Installed: Mid November 2013

I operate mainly on the digital modes running less than 50 Watts.  All of the sudden after a few days operating with this antenna, I start to have RFI and my radio was acting up; such as changing bands, SWR changing values, radio failures and turning off. However, when I used my Hy-Gain 18 HT vertical on the same band none of the abnormality occurred.
I contacted MFJ and confirm that what I was noticing was a failure of their “matching network” AKA balun.  They offered no solutions. Then I contacted Palomar Engineers and bought the 1:1 new toroid RF beads.  I called Palomar Engineers and I happened to talked to you directly; regarding the on going issue with the MFJ antenna. I found out that the 1:1 balun was not what I needed (I was miss-informed by MFJ that it was 1:1 matching network.)
You offered to make the required balun 4:1 and the rest is history.

Here are my findings:

  1. No more RFI displayed on the monitors.
  2. Radio not acting up or turning off.
  3. The SWR at 160/80 meter is 1.2:1
  4. No antenna tuner required.  (radio goes to Bypass automatically.)
  5. Worst SWR is on 10 meter with a 2:1 but still usable, with antenna tuner 1.5.
  6. One happy OCFD user!

Thanks to Palomar Engineers design and engineering for solving this issue.

73, Ernest – W4EG