Off Center Fed (OCF) Dipole Baluns

1502429258 - Off Center Fed (OCF) Dipole Baluns
+3

SPE 1.3/1.5K-FA HF Linear Amplifier Deluxe RFI Kit - 17 Filters for RF In/Out, AC power, CAT/USB/ALC/PTT

RFI-LA-SPE1.5K-FA
$149.95
In stock
1
Product Details
MPN: RFI-LA-SPE1.5K-FA
Filter Power Rating (PEP watts): max coax cable rating
RFI Suppression Range (MHz): 1-100 MHz
# Ferrite Filters: 12
Typical Use:: AC/DC power, RF In/out, Control Lines

All coax I/O and control lines and AC/DC power line for SPE-1.3K-FA or SPE-1.5K-FA amplifiers with multiple RF inputs and outputs, control/keying/frequency I/O.

Included are the following chokes and installation guidelines to suppress RFI in and out:


RF Input (3x):Ring Filter (1.4” ID) – 5-9 turns of RG-58/8X size through center

RF Output (4x):Snap On Filter (1” ID) – 3 turns of coax cable through center

Relay Cable/ALC Cable (4x):Snap On Filter (1/2” ID) – multiple turns through center

CAT/USB (5x):Snap On Filter (1/2” ID)- multiple turns through filter for each ACC

AC Power:Snap On Filter (1” ID) – 3 turns of power cord through center

You get 1.4" ID Ring x 3, 1" ID snap on x 5, 1/2" ID snap on x 9 with each kit.

Save this product for later
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