Off Center Fed (OCF) Dipole Baluns

2520706710 - Off Center Fed (OCF) Dipole Baluns
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Ferrite Snap On Combo Pack, Mix 31, RFI Range 1-300 MHz - 1/4, 3/8, 1/2, 3/4 - 22 filters

FSCP-31-22
$95.00
In stock
1
Product Details
Brand: Palomar Engineers
UPC: Does not apply
MPN: FSCP-31-22
Type: NEW
Country/Region of Manufacture: United States

Mix 31 Ferrite Snap On Combo pack (RFI Suppression range is 1-300 MHz)

The Ferrite Snap On Combo Pack is a convenient solution for troubleshooting RFI/EMI with various diameter cables ranging from 1/4″ to 3/4″ for use as either single turn or multiple turn ferrite chokes.

The snap on chokes are useful for RF coax, AC/DC power cables, and device interconnection cables.

Always use a snap on ferrite 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 turns in series).

Included in the combo pack are our most popular snap on sizes as follows:

FSB31-1/4 – 1/4″ ID – 6 pieces

FSB31-3/8 – 3/8″ ID – 6 pieces

FSB31-1/2 – 1/2″ ID – 6 pieces

FSB31-3/4 – 3/4″ ID – 4 pieces


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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