Portable Operation RFI Kits

2981648738 - Portable Operation RFI Kits
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CB Radio Generic Mobile Transceiver RFI/Noise Reduction Kit, RFI Range: 20-60 MHz, Works on all brands

RFI-CB-MOBILE
$19.95
In stock
1
Product Details
MPN: RFI-CB-MOBILE
Country/Region of Manufacture: United States
Filter Power Rating (PEP watts): 500
Common Mode Attenuation (db): <=25 dB
RFI Suppression Range (MHz): 20-60 MHz
# Ferrite Filters: 2

Palomar Engineers RFI Filter Kit for CB Radio Radio Transceivers from 20-30 MHz uses ferrite rings for the DC power supply and the coax to the antenna.

BUY THIS KIT NOW TO SOLVE YOUR RFI/EMI NEEDS! WORKS WITH ALL BRANDS (Cobra, DAS, Midland, Uniden etc.) OF CB/HAM/COMMERCIAL RADIO RIGS in 20-60 MHz range.


Purpose

The RFI kit is designed to be installed on your radio transceiver to reduce Radio Frequency Interference (RFI) caused by common mode current on the outside of the coax braid at the output of your radio and on the DC power supply cable.

This kit will help reduce or eliminate:

1. “Hot mic” RFI caused by poor grounding of antennas or common mode currents from linear amps feeding unbalanced (coax fed) antennas without baluns/line isolators.

2. RFI to neighbor’s electronic devices including audio/video systems, computers, telephones, garage door openers, etc.

3. RFI to your other radios, audio/video systems, computers, telephones, etc.

A side benefit is a reduction in noise floor in your receiver depending on the amount of noise being introduced by common mode currents (which are blocked/reduced by the chokes in this kit).

These chokes use a special mix of ferrite core material that is effective in suppressing radio frequency interference from Ham Radio amplifiers.


Included are the following chokes and installation guidelines:

DC Input: F240 Ring – 3-7 turns of DC power cable - sized for smaller plugs

RF Input/Output: F240-31 ring - wrap 6 turns of RG8X size cable near the back of the radio

Also make sure you connect a good RF ground to the transceiver ground post.

For additional RFI suppression, use a MC-1-500-50 mini feed line choke at the antenna feed point to suppress common current on the coax feed line during transmit and a CMNF-500-50 Coax Noise Filter to reduce common mode noise during receive operations.

If you use a switching power supply for base operation, consider the RFI-SMPS switching power supply RFI kit.

If you use a linear amplifier we have RFI kits for linear amplifiers that help suppress RFI in your shack or in your neighbor’s house.

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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 below:

Generator RFI testimonial:

Bob 

Received your order in a timely fashion. Tried the generator kit on Sunday & it drops the noise from S9 to S5 and 
took out all the electrical noise.  I may want some more toroids from you at some point for other interference problems
I have  here.
Ken VE3KCY

Using an amplifier?  Don’t forget our Linear Amplifier RFI Kits

Want to make up your own RFI kits for a particular operation? Here are links to some of  typical RFI solutions used in portable operations:

AC/DC common mode filters

Feed Line chokes

Coax Noise Filters

If you use a computer for logging in your portable operations, RFI getting into computers will often lock up your computer and/or radio and a computer RFI suppression kits may be helpful

Computer RFI Kits

Make your expedition or portable operation a pleasant and fun outing and remember to take along your RFI kits so you have more time to operate rather then to troubleshoot intermittent or noisy receiver conditions.

Portable Antenna Kits

If you need an effective portable antenna which folds up for transport yet is easy to deploy at your operating site, consider the BULLET series of end fed wire antennas.

BULLET Antennas (click on link or picture for more info)

Bullet Antenna Product 300x292 - Portable Operation RFI Kits