FT400-3I, ID=3", RFI Range 1-300 MHz
Quantity | Price per item | Discount |
2 items | $37.95 | 5% off |
10 items | $34.95 | 13% off |
(4″ OD, 3″ ID hole), available in mix 31 only
Excellent for large cables or multiple cables – use multiple cores for higher choking. Also useful when you need high turns count for high choking with large cable - works on AC or DC power lines and also coax cable lines.
I use them to build common mode rf chokes. 5 works great, and more give a diminishing return beyond 7 and I couldn't tell the difference.
RRRobert R.Verified buyerThese worked great to cut down noise on my Drake TR7!
LVLee V.Verified buyerI greatly appreciate the prompt delivery, quality products and professionalism of this company.
JFJeff F.Verified buyerThank's
GLGuy L.Verified buyer.
TGThomas G.Verified buyer
I have bad RFI from my refrigerator, freezer, dish washer, and microwave. The interference is worse on 40M (S9+). On 20M it is between S8 and S9. Is this the product I need to eliminate the RFI, or is there a better mix? I bought the Yaesu FT-710 Deluxe Transceiver RFI Kit and installed it per instructions. It did help with some noise removal, but my sound floor is still too high. I tried calling 760-747-3343 but it says the number is no longer taking calls. I tried email, but no response. Please help me with my issues.
Best bet for these items is a large ferrite on AC power cord as close to appliance as possible. Use a FSB31-1-1 split bead or better yet a ACCF-1.4 for small plugs or ACCF-3 for the larger plugs like dryers, generators, etc. Use as many turns as possible thru the center. We have the RFI-KLA kit for multiple appliances.
Seen two wrap patterns, one where the loops are all in the same direction all the way around the core and in the other pattern, half the loops are in one direction then the coax crosses across the core and then loops in the opposite direction for the remaining half of the loops. Is there a difference in attenuation between the two wrap patterns? Seems the Left Hand Rule would indicate a significant difference.
Electrically these are the same measured common mode rejection. The cross mode version is mechanically easy to install with the input and output opposite each other.
when I am working digital modes at 20m and 40m using my End Fed antenna my PC monitor turns off. Could this mix eliminate that problem?
yes the effective range is 1-300 MHz
Are these the same beads used in your BA-58-5? Thank you.
yes
Would this mix31 be good suppression for CAT ethernet cable noise? If I have a device like a security camera which side is best to place the coke? On the camera end or on the other end?
best to put one on both ends depending where the problem is seen.