I have a huge bag from Amazon. I wasn't very confident they were effective. I bought a couple of toroids from Palomar (very expensive) and wrapped the coax through the ring 10 times. It worked but this is a much cheaper solution. Thanks for proving they work.
I stop using wall warts for my Raspberry Pi's. Instead I use a multiple outlet Anker power adapter. It has enough power and no noise. Plus it has it's own AC cord so I don't take up another outlet.
Use a torroid and put multiple loops of wire through the core. This is much more efficient (and less costly) than snapping on 4 or 6 of those ferrite beads. The reason is ... When a conductor is passed through the center of a ferrite bead, the impedance goes up with the SQUARE of the number of passes through the center. With a torrid, you can get MANY more loops through than a snap on.
I have both a Toroid and 5 Ferrite beads. I think I´m gonna do some experiments. My goal is to have a clean reception at HF with my Raspi4 and SDR++. Thanks you guys for the tips
I found that putting them at the very end, at each end, seemed better than putting several on at only one end. Putting them in the middle of the cable isn't that useful.
Dang man, that wall wart is "throwing out enough static to light up New York". So, would a better toe-roid clamp it down better than all the snap-on's ?
I used a 12v to 5v buck converter (since the 12v supply was fine)... cleared everything up except 10/12 meter bands .. Once I got rid of my Dell monitors, 10 and 12 were just fine.
@@temporarilyoffline I second this, Is your triplite PS a switcher or is it heavy with a internal trasnformer ? You may want to try to move the Buck Converter further way from the PS and Radio "if" you get any, Also a small metal box for the BC will help shield any noise, Same for the PI try in in a metal case. Thanks for the video its great you share your tinkering events with everyone very helpful.
Those wallwarts are a plague sometimes. Have been running into them as well, even from a (HAM) HT(!). Replaced that one because it was no fun on HF whatever I did - at least before the ferrites. What I found effective is running the lead through the same ferrite more than once - if there's the space for that it is. Looping wires through the same ferrite 4 times was more effective (in my case) than running multiple in a row. You might want to give that a try :) Let me know if you did and if it made a difference
You need a clean power source. I use my radio psu to power anything related to radio. I would also use mix 43 ferrite ring wound with the usb lead if using HF. This kills my RFI stone dead but I am not sure for VHF/UHF.
Just cover the whole cluster of cable cankers with some heat shrink and it won't look as jankey. Not unlike the coax choke that Chameleon sells (CHA RFI CHOKE).
I have a huge bag from Amazon. I wasn't very confident they were effective. I bought a couple of toroids from Palomar (very expensive) and wrapped the coax through the ring 10 times. It worked but this is a much cheaper solution. Thanks for proving they work.
It was what I had in hand, I'm happy with the results.
Nothing like seeing a live demo of the effects!
I was pretty surprised with the results.
Glad it worked out.
Do you think placement along the length of cord would have an effect?
It would indeed, in this case, closer to the power source is better, but it could go either way
I stop using wall warts for my Raspberry Pi's. Instead I use a multiple outlet Anker power adapter. It has enough power and no noise. Plus it has it's own AC cord so I don't take up another outlet.
I've got one of those in use, I love Anker Products
Nice video TO! Keep them coming!
Thanks! Will do!
There is one in every crowd. Darn warts !
Sometimes there are 2. ;-)
Use a torroid and put multiple loops of wire through the core. This is much more efficient (and less costly) than snapping on 4 or 6 of those ferrite beads. The reason is ... When a conductor is passed through the center of a ferrite bead, the impedance goes up with the SQUARE of the number of passes through the center. With a torrid, you can get MANY more loops through than a snap on.
Good point, thanks for the tip!
I have both a Toroid and 5 Ferrite beads. I think I´m gonna do some experiments. My goal is to have a clean reception at HF with my Raspi4 and SDR++. Thanks you guys for the tips
Thanks TO, You do a great job of explaining things.
I saw the opportunity, there was no danger, so I took it.
an excellent experiment!
Thanks!
did you have your pi hooked up to the radio with a USB cable?
If so, did you try toroids on the USB cable?
just wondering.
The Pi was hooked to the radio for sure. (the black cable is the CI-V cable). I only put toroids on the USB Power cable so far.
I found that putting them at the very end, at each end, seemed better than putting several on at only one end. Putting them in the middle of the cable isn't that useful.
Dang man, that wall wart is "throwing out enough static to light up New York". So, would a better toe-roid clamp it down better than all the snap-on's ?
It for sure would - this is what I had on hand and I was just playing around. It was interesting to see the outcome.
I used a 12v to 5v buck converter (since the 12v supply was fine)... cleared everything up except 10/12 meter bands .. Once I got rid of my Dell monitors, 10 and 12 were just fine.
I'll be trying a buck converter in this setup in the future.
@@temporarilyoffline I second this, Is your triplite PS a switcher or is it heavy with a internal trasnformer ? You may want to try to move the Buck Converter further way from the PS and Radio "if" you get any, Also a small metal box for the BC will help shield any noise, Same for the PI try in in a metal case. Thanks for the video its great you share your tinkering events with everyone very helpful.
@@jimw9170 Its a lot of fun to do and I hope it inspires people to just try something. That Tripp-Lite is very heavy with an internal transformer.
Those wallwarts are a plague sometimes. Have been running into them as well, even from a (HAM) HT(!).
Replaced that one because it was no fun on HF whatever I did - at least before the ferrites.
What I found effective is running the lead through the same ferrite more than once - if there's the space for that it is.
Looping wires through the same ferrite 4 times was more effective (in my case) than running multiple in a row. You might want to give that a try :)
Let me know if you did and if it made a difference
I 100% agree, more passes through the core are better. I do have another core here that was specifically made for doing the job.
You need a clean power source. I use my radio psu to power anything related to radio. I would also use mix 43 ferrite ring wound with the usb lead if using HF. This kills my RFI stone dead but I am not sure for VHF/UHF.
Eventually this will be portable, but for now I'm just playing around. Thanks for the tips!
Hi better get larger ones an coil the cable in multi turns in
Good idea!
Wall works are good 4 RFI
Good for creating it! Agreed!
Just cover the whole cluster of cable cankers with some heat shrink and it won't look as jankey. Not unlike the coax choke that Chameleon sells (CHA RFI CHOKE).
Good idea!
!♡♡♡
WooHoo!
Hello T O
Hey Paul!