Computer RFI Kits

977476512 - Computer RFI Kits
+4
+3
+2

F240-31, ID=1.4", AC/DC/Coax Noise Filter, RFI Range 1-300 MHz, AKA FT240-31

Store/Ferrite Core Products/Mix 31/Ring - Mix 31 - RFI Range: 1-300 MHz
SKU F240-31-1
$9.99
Bulk pricing available for quantities of 10 units or more
1
Buy more, save more
QuantityPrice per itemDiscount
10 items$9.0010% off
100 items$7.5025% off
Save this product for later
Customer reviews
No reviews yet. Only signed-in customers who bought this product can leave reviews. To leave a review, sign in
Share this product with your friends
Pin it
F240-31, ID=1.4", AC/DC/Coax Noise Filter, RFI Range 1-300 MHz, AKA FT240-31
Store/Ferrite Core Products/Mix 31/Ring - Mix 31 - RFI Range: 1-300 MHz
Product Details
MPN: F240-31
Country/Region of Manufacture: China
RFI Range (MHz): 1-300 Mhz
ID-B (in/mm): 1.4/35.6
OD-A (in/mm): 2.4/61
Height-C (in/mm): .5/12.7
Weight (oz/gm): 188 grams
Initial permeability: 1500
Case/Box lot size: 100
Frequency (MHz)/Single turn impedance (ohms): 1MHZ: 12 ohms, 10MHz: 40 ohms, 25MHz: 63 ohms

Very useful for AC/DC power, coax cable common mode current suppression. For highest choking resistance, wrap cable through center of ring as many turns as possible. DO NOT use for impedance transformers (2:1, 4:1, 9:1, etc.) - use Mix 43 or Mix 61 for high power.

All F240-31 singles individually labelled with specifications for ease of identification.

Customer Feedback:

At 100 watts on 40 meters, my CW sidetone used to be the smoke detectors in my house! After installing a set of ferrite rings on the 120V and 12V lines, I can finally work 40 meters CW without hearing my code through the smoke detectors. Thank you!
Paul
K7SHR
Show More
You May Also Like
On Sale
977476524 - Computer RFI Kits
FT240-3I, ID=1.4", AC/DC/Coax Noise Filter, RFI Range 1-300 MHz, Case of 100
FT240-3I, ID=1.4", AC/DC/Coax Noise Filter, RFI Range 1-300 MHz, Case of 100
SKU F240-31-100
List price $1,000.00
Save 21%
$795.00
On Sale
1025194825 - Computer RFI Kits
DC Voltage Common Mode Noise Filter - Marine, RV, Communications, 600 Volts/30 Amps
DC Voltage Common Mode Noise Filter - Marine, RV, Communications, 600 Volts/30 Amps
SKU RFI-DC-30
List price $109.95
Save 18%
$89.95
On Sale
1327136777 - Computer RFI Kits
RG-8X Coax Jumper Cable with PL-259's on each end - 3 feet
RG-8X Coax Jumper Cable with PL-259's on each end - 3 feet
SKU RG-8X-3
List price $19.95
Save 15%
$16.95
On Sale
977476519 - Computer RFI Kits
FT240-3I, ID=1.4", AC/DC/Coax Noise Filter, RFI Range 1-300 MHz, Bulk Pack of 10
FT240-3I, ID=1.4", AC/DC/Coax Noise Filter, RFI Range 1-300 MHz, Bulk Pack of 10
SKU F240-31-10
List price $100.00
Save 10%
$89.95
2665304136 - Computer RFI Kits
Coax Jumper Choke - RG-8X - RFI Range: 1.8-65 MHz, -30 dB Noise Reduction, 1.5KW PEP, 3 FT "Tail"
Coax Jumper Choke - RG-8X - RFI Range: 1.8-65 MHz, -30 dB Noise Reduction, 1.5KW PEP, 3 FT "Tail"
SKU JC-1-1500-6
$34.95
2325496949 - Computer RFI Kits
Coax Jumper Choke - RG-8X - RFI Range: 14-30 MHz, -40 dB Noise Reduction, Yagi, Log Periodic, CB Antennas
Coax Jumper Choke - RG-8X - RFI Range: 14-30 MHz, -40 dB Noise Reduction, Yagi, Log Periodic, CB Antennas
SKU JC-1-1500CB
$29.95
982808144 - Computer RFI Kits
AC Cable Noise Filter for Large Plugs - 3" ID
AC Cable Noise Filter for Large Plugs - 3" ID
SKU ACCF-3
$39.95
2908543317 - Computer RFI Kits
AC Power Cord Choke + Power Cord- 120VAC RFI Range: 1-30 MHz, -28 dB Noise Reduction, 15 Amp
AC Power Cord Choke + Power Cord- 120VAC RFI Range: 1-30 MHz, -28 dB Noise Reduction, 15 Amp
SKU AC-CHOKE-6
$19.95
1725564654 - Computer RFI Kits
DC-AC Inverter Common Mode RFI/Noise Filter Kit for DC in and AC Output
DC-AC Inverter Common Mode RFI/Noise Filter Kit for DC in and AC Output
SKU RFI-INVERTER
$34.95
Display prices in:USD
These RFI kits are specifically selected to cure most household computer device RFI problems. It contains ferrite toroids for AC or DC power supply protection and Snap On ferrite spli beads selected to eliminate RFI from 1 to 1000 Mhz. The beads are easy to use, don’t require modification of the protected equipment and work in almost all cases, even when plug-in filters fail. 

 

 

Typical Installations

 

20131210 115137 150x150 - Computer RFI Kits

Ethernet Cable on F-240 Toroid – 7 turns

20131210 114800 150x150 - Computer RFI Kits

Ethernet Cable on FSB-1/2 – 3 turns for 9X Impedance

20131210 1148191 150x150 - Computer RFI Kits

Ethernet Cable on FSB-1/4

20131210 114716 150x150 - Computer RFI Kits

AC Cable on F-240 Toroid – 6 turns

20131210 114844 150x150 - Computer RFI Kits

DSL Modem DC Power Supply on F114-43 Toroid – 5 Turns