Off Center Fed (OCF) Dipole Baluns

Balun/Unun DIY Kits

Store/Antenna Products/CUBE Impedance Transformers (<1:1, 1:1, >1:1)/Balun/Unun DIY Kits
Refine by
 

Filters

Clear all
Filters
Clear all
2990313247 - Off Center Fed (OCF) Dipole Baluns
50:200 ohm (4:1) Dual Core Current Balun Kit, 1-55 MHz, 1500 watts PEP, for OCF, Loop, Ladder Line Antennas
50:200 ohm (4:1) Dual Core Current Balun Kit, 1-55 MHz, 1500 watts PEP, for OCF, Loop, Ladder Line Antennas
Ladderline to Coax Transformer
SKU BA-4-1500DC
$37.95
982795650 - Off Center Fed (OCF) Dipole Baluns
50:200 ohm (4:1) HF Balun or Unun Core Kit, 3-31 MHz, 250 watts
50:200 ohm (4:1) HF Balun or Unun Core Kit, 3-31 MHz, 250 watts
SKU BA-4-250
$19.95
1072922502 - Off Center Fed (OCF) Dipole Baluns
50:450 ohm (9:1) Balun or Unun Core Kit, .5-32 MHz, 1000 watts PEP, end fed/Ladder Line, T2FD antenna
50:450 ohm (9:1) Balun or Unun Core Kit, .5-32 MHz, 1000 watts PEP, end fed/Ladder Line, T2FD antenna
SKU BA-9-1000
$29.95
581480949 - Off Center Fed (OCF) Dipole Baluns
50:450 ohm (9:1) Balun or Unun Core Kit, 1.8-30 MHz, 250 watts PEP, end fed, T2FD antenna
50:450 ohm (9:1) Balun or Unun Core Kit, 1.8-30 MHz, 250 watts PEP, end fed, T2FD antenna
SKU BA-9-250
$21.95
581498192 - Off Center Fed (OCF) Dipole Baluns
50:50 ohm (1:1) Common Mode Choke HF Balun Kit - 1500 watt PEP, 1.8-31 MHz
50:50 ohm (1:1) Common Mode Choke HF Balun Kit - 1500 watt PEP, 1.8-31 MHz
SKU BA-1-1500
$29.97
581480972 - Off Center Fed (OCF) Dipole Baluns
Enclosure Box - 4" x 4" x 4"
Enclosure Box - 4" x 4" x 4"
SKU CB-Box-2
$19.95
890710981 - Off Center Fed (OCF) Dipole Baluns
Enclosure Box - 4.375" x 4.375" x 2.375"
Enclosure Box - 4.375" x 4.375" x 2.375"
SKU CB-Box-1
$14.95
581480969 - Off Center Fed (OCF) Dipole Baluns
Enclosure Box - 6" x 6" x 4"
Enclosure Box - 6" x 6" x 4"
SKU CB-Box-3
$27.95
On Sale
2329254354 - Off Center Fed (OCF) Dipole Baluns
FT140-43, ID=.9", OD=1.4", RFI Range 25-300 MHz
FT140-43, ID=.9", OD=1.4", RFI Range 25-300 MHz
SKU F140-43
List price $4.50
Save 14%
$3.89
3215425210 - Off Center Fed (OCF) Dipole Baluns
Halyard Hoist Eyebolt Kit - 1/4-20 Stainless Steel
Halyard Hoist Eyebolt Kit - 1/4-20 Stainless Steel
SKU TEK-1/4-1
$4.95
982895404 - Off Center Fed (OCF) Dipole Baluns
N Connector Kit (female chassis connector)
N Connector Kit (female chassis connector)
SKU UG-58-1
$7.49
3498473398 - Off Center Fed (OCF) Dipole Baluns
Preassembled Balun & Unun Boxes, Stainless Hardware - just add your ferrite choke or transformer
Preassembled Balun & Unun Boxes, Stainless Hardware - just add your ferrite choke or transformer
SKU CU-BOX-1-SO
$49.95
581480975 - Off Center Fed (OCF) Dipole Baluns
SO-239 Kit (female chassis connector + hardware)
SO-239 Kit (female chassis connector + hardware)
SKU SO-239 Kit-1/2
$3.95
3215425215 - Off Center Fed (OCF) Dipole Baluns
Side Eyebolt Kit - 1/4-20 Stainless Steel
Side Eyebolt Kit - 1/4-20 Stainless Steel
SKU SEK-1/4-1
$5.95
3214887724 - Off Center Fed (OCF) Dipole Baluns
Side or Top Stud Kit - 1/4-20 Stainless Steel
Side or Top Stud Kit - 1/4-20 Stainless Steel
SKU SSK-1/4-1
$3.95
808654873 - Off Center Fed (OCF) Dipole Baluns
UHF PL-259 Male Plug to SO-239 Female Right Angle 90 Degree RF Adapter Connector
UHF PL-259 Male Plug to SO-239 Female Right Angle 90 Degree RF Adapter Connector
SKU UHF-90
$6.95
Display prices in:USD

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