RFI radio frequency interference chokes
Common mode chokes
EMI suppression cores, round cable snap-its

BIRD wattmeters HENRY RF power Amplifiers SAMLEX power supplies TOHTSU coaxial relays

See results of AD5X Phil Salas tests on these chokes CLICK HERE
RFI choke core, ferrite core, common mode choke, clamp filter
High Frequency Split Round Cable Suppression Cores
EMI RFI suppressor cores chokes


Choke out unwanted RFI (Radio Frequency Interference). These are much better (and cost less!) than those RF chokes sold by a popular company because of the greater surface area to choke RF out of the wire.

RND-6 is a loose fit on RG-8, RG-213, 9913, LMR400, etc. (to prevent slipping, use a wire tie top prevent choke from sliding down the cable)

The RCT-2,  RCT-2W and RCT-2T choke (left pic below) will easily snap over RG-58, RG-59, RG8X, MINI RG-8, etc.
All chokes will accommodate multiple turns of many common small wire types
Use these chokes with regular wire of whatever wire is feeding the device being interfered with.
Just laying the wire inside the choke is equivalent to multiple turns of wire inside "their" choke. Plus, our chokes cost you less! (Their small chokes are 4 for $15) Snaps on and snaps off, reusable.
Standard "MF,HF,VHF" mix. Users have reported good results from broadcast band 550-1700 KHz) up t
hrough the 144 MHz band, useable up to 300 MHz. RND-6 good to 1+ GHz
HAMS: use 10+ of our chokes on your coax at the feedpoint of your antenna as a "current" balun!


Suggested uses

RFI Chokes


1.25"L x .75 x .75

Hole diameter 0.25"


1.25"L x .75 x .75

Hole diameter 0.25"


1.25"L x .75 x .75

Hole diameter 0.25"


      1.575"L x 1.181" x 0.787" 
Hole diameter 0.571"
Click on choke for larger view       Wurth 7427151
Radiodan # RCT-2 RCT-2T RCT-2W       RND-6
Manufacturer Fair Rite Click for specs
Fair Rite       Wurth Electronic
click for specs 7427151
Qty in case 540 320 224       280

Plus shipping
5 for $10
30 for $50
100 for $150
Case 540 $650
5 for $10
30 for $50
100 for $150
Case 320 $400
5 for $10
30 for $50
100 for $150
Case 224 $280
      3 for $10
16 for $50
Coax sizes Fits RG58, RG8X, RG59, mini-8, etc Fits RG58, RG8X, RG59, mini-8, etc Fits RG58, RG8X, RG59, mini-8, etc       Fits RG8, RG213, LMR400, etc
Loose fit
Reusable? Yes Yes Yes       Yes (requires tool, not included or use small screwdrivers to release tabs)
All fit multiple turns of many wires such as computer sound card, telephone, alarm system, whatever needs RF choked out of it!
All usable from very low frequencies 500 KHz  up to 150 MHz and beyond (RND-6 good to 1+ GHz)

Stock up now while supply lasts!
50 state
USA shipping charges
$7 for up to 20 chokes
$12 for 21 to 50 chokes
$16 for 51 to 100 chokes

International shipping is available.

Order via our
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