07-24-2019, 01:47 AM
My Dc to DC laptop charger is my biggest RFI noise maker whaich actually annoys me on those two tv channels, but my inverter powering the original AC to DC power brick is significantly worse in terms of RFI and powr consumption..
The Faraday cage helps, as do the ferrite chokes( very slightly) but if the tv signal itself is attenuated somewhat due to weather or the angle of my antenna, then the only solution is unplugging the transformer form the laptop and running it on battery power, which only lasts for about 45 miutes these days, or watching a different Tv channel not affected by the power brick.
I have some cardboard window panels covered wit a few layers of reflextix for my side windows. if I place these between my TV and the Dc to DC transformer and as much of the wire to and from laptop as I can, it does help somewhat, sometimes.
My cheapo PWm charge controllers get audibly noisy after it reaches absorption voltage. I can hear it start whining when it reaches absorption voltage and starts backing off the current to maintain thei constant voltage. I do have a 12v tv in the workshop powered from the same battery as the charge contrller is on,. It has a big antenna , and I almost never have the tv on when the sun on the panel with the controller making noise so I have not seen it knock out the stations more or less than my MPPT controller in my van does.
My MppT charge controller does not noticeably affect my TV, but it did when it was physically located closer to the tv and when stations were analog, and i could see diagonal stripes move across the screen. I usually don't do much TV watching when the sun is up though. Dont listen to Am or Fm radio as advertisements renew my contempt for too many things.
Quad shield rg-6 cable, I've often wondered if they sell that type of braided overlapping shielding one can slide over a wire, like my laptop dc to dc transformer input and output wires.
I've got some plastic stuff for covering/stealthifying and protecting wires on a recent project, not on my van, that expands and contracts kind of like a chinese finger trap over wire inserted into it s ends. If this were metal, and slid over power wires, and grounded , it could likely reduce rfi emitted from power wires, but i assume you Ham guys would be all over it if it were effective and easily available and not exorbitantly priced.
[img] https://images-na.ssl-images-amazon.com/...L1000_.jpg[/img] Takes a while to insert wire through it. First time i used it, but i got to say I like it in terms of protecting and hiding red and black wires against a white background.
I wonder about that braided steel hose like used on toilet tanks or perhaps some fllexible brake lines hoses, if that would be effective reducing rfi and not be too obtrusive with power wires running through it.
The wires between my shunt and battery monitor are supposed to be twisted pair, to reduce RFI from affecting the readings. It seems to eb effeective, but when the twisted pair wires run nearby other wires i wrapped both in that aluminum tape and try to have them cross at 90 degree angles where they have to cross other wires.
Years ago I needed some vaccuum line, to run between egr solenoid and egr valve and the store did not have any dedicated vaccuum line, but the clerk said we have fuel line in that inner diameter andf cut off the length i asked for. When they rang it up I was like no way am i paying that much for some vaccuum line. Perhaps it was 150PSI fuel injection hose or something. Then an older clerk skolded the guy and busted out the windshield wiper hose whose price was tolerable.
The Faraday cage helps, as do the ferrite chokes( very slightly) but if the tv signal itself is attenuated somewhat due to weather or the angle of my antenna, then the only solution is unplugging the transformer form the laptop and running it on battery power, which only lasts for about 45 miutes these days, or watching a different Tv channel not affected by the power brick.
I have some cardboard window panels covered wit a few layers of reflextix for my side windows. if I place these between my TV and the Dc to DC transformer and as much of the wire to and from laptop as I can, it does help somewhat, sometimes.
My cheapo PWm charge controllers get audibly noisy after it reaches absorption voltage. I can hear it start whining when it reaches absorption voltage and starts backing off the current to maintain thei constant voltage. I do have a 12v tv in the workshop powered from the same battery as the charge contrller is on,. It has a big antenna , and I almost never have the tv on when the sun on the panel with the controller making noise so I have not seen it knock out the stations more or less than my MPPT controller in my van does.
My MppT charge controller does not noticeably affect my TV, but it did when it was physically located closer to the tv and when stations were analog, and i could see diagonal stripes move across the screen. I usually don't do much TV watching when the sun is up though. Dont listen to Am or Fm radio as advertisements renew my contempt for too many things.
Quad shield rg-6 cable, I've often wondered if they sell that type of braided overlapping shielding one can slide over a wire, like my laptop dc to dc transformer input and output wires.
I've got some plastic stuff for covering/stealthifying and protecting wires on a recent project, not on my van, that expands and contracts kind of like a chinese finger trap over wire inserted into it s ends. If this were metal, and slid over power wires, and grounded , it could likely reduce rfi emitted from power wires, but i assume you Ham guys would be all over it if it were effective and easily available and not exorbitantly priced.
[img] https://images-na.ssl-images-amazon.com/...L1000_.jpg[/img] Takes a while to insert wire through it. First time i used it, but i got to say I like it in terms of protecting and hiding red and black wires against a white background.
I wonder about that braided steel hose like used on toilet tanks or perhaps some fllexible brake lines hoses, if that would be effective reducing rfi and not be too obtrusive with power wires running through it.
The wires between my shunt and battery monitor are supposed to be twisted pair, to reduce RFI from affecting the readings. It seems to eb effeective, but when the twisted pair wires run nearby other wires i wrapped both in that aluminum tape and try to have them cross at 90 degree angles where they have to cross other wires.
Years ago I needed some vaccuum line, to run between egr solenoid and egr valve and the store did not have any dedicated vaccuum line, but the clerk said we have fuel line in that inner diameter andf cut off the length i asked for. When they rang it up I was like no way am i paying that much for some vaccuum line. Perhaps it was 150PSI fuel injection hose or something. Then an older clerk skolded the guy and busted out the windshield wiper hose whose price was tolerable.
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(Nothing dangerous about it) Get some red and black tape to mark the power and ground wires. 
