F240-31, ID=1.4", AC/DC/Coax Noise Filter, RFI Range 1-300 MHz, AKA FT240-31
F240-31-1
$9.99
In stock
1
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
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