Off Center Fed (OCF) Dipole Baluns

1747122560 - Off Center Fed (OCF) Dipole Baluns
+3

Extra Large Ring/Multi-Snap On Combo Pack, Mix 75, RFI Range 150 KHz-10 MHz - 28 filters (1/4", 1/2", 1.4")

XLRSCP-75-28
$299.95
In stock
1
Product Details
MPN: XLRSCP-75-28
Material: 75

This Extra Large size Ring and Snap-On Combo Pack is our BEST VALUE and a convenient solution for troubleshooting RFI/EMI (150 KHz-10 MHz) with various diameter cables ranging from 1.4" to 1.4"/35.6mm for use as either single turn or multiple turn RFI filters. Great for Grab and Go portable operations or general RFI and noise suppression.

The filters are useful for RF coax, AC/DC power cables, Ethernet, data, audio/video and device interconnection cables.

Always use a snap on or ring with a larger inside diameter than the diameter of the cable and use multiple turns if possible (2 turns through the snap on is the same as 4 snap ons with 1 turn). Included in these combo packs are our most popular snap on sizes as follows:

Extra Large Combo Pack includes the following:

F240-75 ring – 1.4″/35.6mm ID – 6 pieces

FSB75-1/4 – 1/4″/9.5mm ID – 12 pieces

FSB75-1/2 – 1/2″/12.7mm ID – 10 pieces

Normal Retail price is $327 for these parts bought individually. You also get FREE USA SHIPPING for this item.

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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