HF High Power Impedance Transformers

Portable and Mobile Radio RFI Solutions

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Portable operation is fun but also brings challenges to the radio operator concerning receiver “noise” levels, RF interference from adjacent sources including close by transmitting stations, and RFI from portable generators. A typical scenario and some suggested Palomar product solutions are shown in the picture.

Portable Operation RFi Reduction Picture png - HF High Power Impedance Transformers

Portable operation is typical of ham radio operating events such as Field Day, Summits on the Air, Route 66 events, National Parks on the Air, California QSO party, DXpeditions, and emergency operation command posts, etc.

Suggestions

Each low power operating station with a generator should have:

  1. Generator RFI Kit (Part # RFI-GEN) with FSB31-1 ferrite filters at each end + Nylon ties for security
  2. Transceiver RFI Kit (Part # RFI-XCVR)
  3. Laptop RFI Kit (Part # RFI-1C)
  4. Coax Cable Noise Filter (Part # CMNF-1)
  5. Bullet-55 portable HF end fed antenna system


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982840112 - HF High Power Impedance Transformers
AC/DC Generator RFI Noise Filter Kit - 3" ID - 2 filters
AC/DC Generator RFI Noise Filter Kit - 3" ID - 2 filters
SKU RFI-GEN-3
$74.95
982840124 - HF High Power Impedance Transformers
AC/DC Generator RFI Noise Filter Kit = 1" ID - 2 filters
AC/DC Generator RFI Noise Filter Kit = 1" ID - 2 filters
SKU RFI-GEN-1
$39.00
2981648739 - HF High Power Impedance Transformers
CB Radio Generic Mobile Transceiver RFI/Noise Reduction Kit, RFI Range: 20-60 MHz, Works on all brands
CB Radio Generic Mobile Transceiver RFI/Noise Reduction Kit, RFI Range: 20-60 MHz, Works on all brands
SKU RFI-CB-MOBILE
$19.95
On Sale
4502924397 - HF High Power Impedance Transformers
Coax Common Mode Noise Filter - 500 Watts PEP, 1-60 MHz, -38dB Common Mode Noise Suppression!
Coax Common Mode Noise Filter - 500 Watts PEP, 1-60 MHz, -38dB Common Mode Noise Suppression!
SKU CMNF-500-50
List price $79.95
Save 13%
$69.95
On Sale
4493391009 - HF High Power Impedance Transformers
Coax Common Mode Noise Filter - 500 Watts PEP, 100 KHz-30 MHz LF & BCB up to -46db Noise Reduction
Coax Common Mode Noise Filter - 500 Watts PEP, 100 KHz-30 MHz LF & BCB up to -46db Noise Reduction
SKU CMNF-500-50LF
List price $79.95
Save 13%
$69.95
On Sale
940463405 - HF High Power Impedance Transformers
Coax Inline Common Mode Choke Unun - 500 Watts 25-300 MHz- 10, 11, 6, 4, 2 Meters
Coax Inline Common Mode Choke Unun - 500 Watts 25-300 MHz- 10, 11, 6, 4, 2 Meters
SKU FC-8X-3-31
List price $39.95
Save 30%
$27.95
940463405 - HF High Power Impedance Transformers
Coax Inline Common Mode Choke Unun - 500 Watts 50-450 MHz
Coax Inline Common Mode Choke Unun - 500 Watts 50-450 MHz
SKU FC-8X-5-61
$39.95
On Sale
4691023028 - HF High Power Impedance Transformers
DC Voltage Common Mode Noise Filter - Marine, RV, Communications, Off Grid Power, 600 Volts/30 Amps
DC Voltage Common Mode Noise Filter - Marine, RV, Communications, Off Grid Power, 600 Volts/30 Amps
SKU RFI-DC-30
List price $129.95
Save 23%
$99.95
4029027008 - HF High Power Impedance Transformers
HF Mobile Transceiver RFI and Noise Reduction Kit, RFI Range 1-300 Mz
HF Mobile Transceiver RFI and Noise Reduction Kit, RFI Range 1-300 Mz
SKU RFi-HF-MOBILE
$39.95
982808125 - HF High Power Impedance Transformers
HF Transceiver RFI/Noise Reduction Kit, RFI Range 1-300 MHz, 5 Filters
HF Transceiver RFI/Noise Reduction Kit, RFI Range 1-300 MHz, 5 Filters
SKU RFI-XCVR-STD
$39.95
On Sale
581468960 - HF High Power Impedance Transformers
Laptop Computer with DC power RFI Kit - 7 Filters
Laptop Computer with DC power RFI Kit - 7 Filters
SKU RFI-Laptop
List price $34.95
Save 14%
$29.95
4266711302 - HF High Power Impedance Transformers
MAXI-CHOKER Coax Line Isolator/Balun, 1-61 MHz, 1.5/3KW, SO-239 In/Stud Output, FLAGPOLE OCF, G5RV, ZS6BKW, BN4000 Replacement, Ladder Line-Coax interface
MAXI-CHOKER Coax Line Isolator/Balun, 1-61 MHz, 1.5/3KW, SO-239 In/Stud Output, FLAGPOLE OCF, G5RV, ZS6BKW, BN4000 Replacement, Ladder Line-Coax interface
SKU MC-1-1500LL
$89.95
4029797252 - HF High Power Impedance Transformers
MAXI-CHOKER Coax Line Isolator/Choke, 1-61 MHz, 1.5/3KW/5KW, up to -60 Db Common Mode Rejection, Static Bleeder Option
MAXI-CHOKER Coax Line Isolator/Choke, 1-61 MHz, 1.5/3KW/5KW, up to -60 Db Common Mode Rejection, Static Bleeder Option
SKU MC-1-1500
$89.95
4222605655 - HF High Power Impedance Transformers
MINI-BALUN 1:1 Coax Interface to Ladder Line, Dipole elements, 500 Watts PEP, up to -38Db Common Mode Rejection, 1-61 MHz, Flagpole, Dipole, Beam and G5RV/ZS6BKW Antennas
MINI-BALUN 1:1 Coax Interface to Ladder Line, Dipole elements, 500 Watts PEP, up to -38Db Common Mode Rejection, 1-61 MHz, Flagpole, Dipole, Beam and G5RV/ZS6BKW Antennas
SKU MB-1-500SS
$69.95
1112255372 - HF High Power Impedance Transformers
MINI-CHOKER Coax Line Isolator, 500 Watts PEP, up to -38Db Common Mode Rejection, 1-61 MHz, 1:1 Unun
MINI-CHOKER Coax Line Isolator, 500 Watts PEP, up to -38Db Common Mode Rejection, 1-61 MHz, 1:1 Unun
SKU MC-1-500-50
$69.95
3548913921 - HF High Power Impedance Transformers
Maxi-Choker, 1:1 Line Isolator 3KW, 7-54 MHz Optimized for Wide Band Log Periodic, HF & 6M Beams. Noise Suppression up to 38 dB
Maxi-Choker, 1:1 Line Isolator 3KW, 7-54 MHz Optimized for Wide Band Log Periodic, HF & 6M Beams. Noise Suppression up to 38 dB
SKU MC-1-3000LP
$109.95
581498047 - HF High Power Impedance Transformers
RFI Kit for Electric Fuel Pump Interference (4 filter set)
RFI Kit for Electric Fuel Pump Interference (4 filter set)
SKU RFI-FP
$29.95
581480060 - HF High Power Impedance Transformers
VHF/UHF Generic Base Transceiver RFI Kit
VHF/UHF Generic Base Transceiver RFI Kit
SKU RFI-VHF-BASE
$49.95
581480060 - HF High Power Impedance Transformers
VHF/UHF Generic Mobile Transceiver RFI/Noise Reduction Kit - Up to 500 MHz
VHF/UHF Generic Mobile Transceiver RFI/Noise Reduction Kit - Up to 500 MHz
SKU RFI-VHF-MOBILE
$19.95
1008627783 - HF High Power Impedance Transformers
Wall Wart RFI Noise Filter Bulk Pack of 10 Filters
Wall Wart RFI Noise Filter Bulk Pack of 10 Filters
SKU RFI-WW-10
$27.95
1008627776 - HF High Power Impedance Transformers
Wall Wart RFI Noise Filter Pack (5 filters)
Wall Wart RFI Noise Filter Pack (5 filters)
SKU RFI-WW-5
$16.95
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The high power ferrite impedance transformer series (> 1:1), configured with outputs to act as a baluns (unbalanced coax in to balanced load output) or as ununs (unbalanced coax input to unbalanced load output) are designed for demanding radio transmitter stations that run over 1,000 watts PEP or run continuous modes like AM, digital, RTTY, FM, etc. at high power levels. Radio contest operators, commercial shortwave broadcast, and industrial and commercial stations use these transformers for for a variety of balanced and unbalanced antenna loads.  Baluns are typically used for balanced loads and antennas like dipoles, loops, log periodics, and direct feed yagi/beams.  Ununs are used  with verticals, end fed wires, horizontal dipoles, G5RV/ZS6BKW, Zepps, vertical wire beams, etc).  All products are in an enclosed NEMA water resistant box with SO-239 input connector and stainless steel side/top studs with wing nuts or side and top eyebolts.  The enclosure box has mounting “side feet” for attachment to a post or antenna boom using nylon ties.