Neighbor just installed a new security light for his outside garage door - dusk to dawn. 13,000 Lumens - 150 watts - LED. Bad RFI on all bands RX at K3LR. Will #31 ferrite on the 120 VAC power line (
Roger Jim Thanks for the great help 73 Tim K3LR line Probably yes. I'd start with the filter that W6GJB and I worked out for use on 2000i generators, described on page 23 of k9yc.com/RFI-Ham.pdf It w
Thanks Dave: Looks like 3 cores will do the trick for the K9YC filter. Winding the cores now. Neighbor is good for a Saturday install. He told me it is a GLD LED 150 Flood light IP66 Man does it crea
Hello Jim: An update on the LED RFI from the K3LR neighbor. W3YQ and I built the choke system as shown in your cookbook. It was installed on Saturday in a plastic box. It knocked down the RFI noise b
Hello Jon: I am using LG 4K ultra TVs in my shack and house. No noise issues. 73, Tim K3LR I'm considering the purchase a new 4K TV for the hamshack to use in conjunction with a Geochron Atlas 4K. Si
The fix for this was one #31 mix ferrite 2.4" O.D. on the line cord (4 turns) of the light as it exits the housing. Then an EMI filter from Delta Electronics - model 10DWCG5. Result is RFI quiet from
Hello Jim: You are spot on. I have these installed at K3LR: https://www.dxengineering.com/parts/dxe-bbgk-2-55-p Stopped RFI - bonding around the rotor. 73 Tim K3LR Yes. W3LPL alerted many of us to th
Hello Alex, I can tell you that this test opened my eyes to how noise is propagated to our radio receivers. Like K9YC, W1HIS and many others I have embraced these findings. There is a reason the nois
Hi Larry You could certainly put it at the radio however in my installation it is much more convenient to install it at the last device before the antenna feedline. My interconnecting cables going fr
Let's drop all political references in our emails. Let's get back to 100% RFI. There is lots to clean up! 73 Tim K3LR RFI Reflector Founder and Moderator --Original Message-- From: RFI [mailto:rfi-bo
Great video Steve! The latest DX Engineering NCC-2 has even better nulling capability for noise reduction - much improved. KB8O had great success - https://www.youtube.com/watch?v=ByBeSg9auCA I used
HI Dan: You might take a look at this: https://www.dxengineering.com/parts/dxe-iso-plus-2 I use them here at K3LR and they work very well - to keep RF out of the Ethernet and to keep RFI from being e
Hi Scott, I am afraid that won't last very long as exposed copper braid will wick water, turn black and then fail unprotected and it is hard to waterproof. Even tinned copper braid is not recommended
Remember we are giving advice to all hams on this reflector. We want to insure we are giving the correct advice There are no short cuts to doing things the right way There is only one way to ground a
Hello Gordon There are no concerns using two inch wide copper strap outside. It will work perfect. 73 Tim K3LR From: James Gordon Beattie Jr [mailto:w2ttt@att.net] Sent: Tuesday, August 17, 2021 1:02
Hi Mike, Several ideas. Your coax chokes (known as ugly baluns - two reasons - #1 they look ugly - chokes You need bypass low Z conductors (thick and short) across your rotation systems (all of them)
This issue is not a broadcast mix or overload in a ham receiver. No RX filter can fix this. This is a problem at the broadcast station(s). Listen to 1940 KHz and hear what is going on. 73 Tim K3LR --
Not sure why we are talking about filters that have no impact on the solution to this problem Has a local ham (skin in the game) contacted the broadcast station(s) general manager or the contract chi
Rest assured - we do have a moderator (me) - I am also the founder of this reflector - which has helped thousands with RFI issues. The cellular topic has run its course - that is true. Having spent 2
I remember getting MN8CX cores from W1WCR back in the day 73 Tim K3LR The MN8CX core was "made popular" back in the day by ON4UN. I recall some (what I jokingly call) "core war shootouts" on the Topb