HFU HF Underground
General Category => Huh? => Topic started by: Davep on March 30, 2019, 1238 UTC
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Broadcast level RF covering 1 kHz -30 MHz . You can hear it out in the yard going swish -swish less than every 2 seconds on a portable . It doesn't have an agitator and whatever computer that controls the swishing must fall under part 15. In my role as patriarch I have banned any washing during pirate hours, but we'll see how that goes.
I will add it to the list of Aquarium heaters , lamps with dimmers, occasional problems with power line arc ( salt air) and intermittent sodium vapor lamps- which I have developed special weapons and tactics assault using a Crossman M1 replica air rifle if there's slow responses by the city ( 1 day). I must warn however, this is becoming risky with all the security cams though if you develop your own tactical. Each must weigh his needs against consequences.
NSA add it to my dossier , he's a street lamp extremist but note he can iterate justification. {End wrant}
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I have an inverter direct drive washing machine that causes the same problems. Can't listen to my Zenith Transoceanic when the washer is running. Radio sounds like an old air raid siren when the washer goes into the spin cycle.
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I liked the old one that didn't work better. I could live with it , but it gets outside on the hf wire. Fridgidaire= Bewareaire
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I assume it's sending via the ac cord, wich makes for a great antenna. Mfj makes a decent line filter as do some others and you can roll your own too. It'll need to pass some current so build it heavy. Also, ferrets on everything might help, especially on the wires going to the control boards. How did we live without networked toasters, coffee pots, and washing machines?!?
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MFJ Rfi filter ....https://www.mfjenterprises.com/Product.php?productid=MFJ-1164B
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I'm sorry but if I turn the thing upside down and it looks like it has a ceiling fan motor in it, I don't want it. Fortunately in this e-crazy world, you can still buy mechanical used washers and dryers for nothing on CL. I paid $100 for my last set of Amana's with stainless tubs.
+-RH
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MFJ Rfi filter ....https://www.mfjenterprises.com/Product.php?productid=MFJ-1164B
Some of the more common ac strips from wallyworld and elsewhere have at least some rfi protection, but not the brute force filtering as in the mfj.
This pdf has destructions for assembling a brute force line filter;
https://522bb370f5443d4fe5b9-f62de27af599bb6703e11b472beadbcc.ssl.cf2.rackcdn.com/uploaded_file/upload/1033/RFI-Ham.pdf
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We have a Kenmore front loading machine, a few years old, and fortunately it does not seem to cause any RFI.
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We have a Kenmore front loading machine, a few years old, and fortunately it does not seem to cause any RFI.
We also have a Kenmore front loading machine, now 13 years old, that puts out hash. In general I'm lucky and it doesn't hit anything so squarely that I can't adjust the passband as needed. (God, I love SDR's just for the ease of that feature alone, something no knobed radio can touch.)
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We bought the Bewareaire because we needed a "laundry center" , stackable W&D in a closet. We saw it at a scratch and dent for about half of the small fortune for one without a dent. So that seemed a no brainer but didn't know the old ways had changed and the " inverter" thing and upside down ceiling fan. Plus the wash goes on what seems an hour and a half. Also didn't know it spews RF like a runaway fire hose.
MDK2 - come back to the darkening side! You can't just deny your past like that https://m.youtube.com/watch?v=G_hr6tig6A0
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Agreed, there are plenty of knobby rigs out there with pbt and if shift. Some even have the fish finder, some others can even have a fish finder spliced in! It's nice to not need a pc to play radio.
While on the subject, a guy who had gobs of rfi from in home devices, for whatever reason decided one day to pass his coax bundle through the wall or wherever it was via one of those flexible dryer vent hose thingies. I'd not be surprised to find his wife decided those coax thingies needed tidying up. He grounded one end of the spiral wire that supports the hose thingy and his rfi vanished. The dryers that spew rfi surely have one of these hose thingies and perhaps grounding same will keep it from becoming an rfi spewing antenna as they must otherwise? Also you can tidy up those unsightly coax cables with a dryer hose thingy and point it out to the wife for a bonus.
Just sayin.
(edited to add this is not an april fools)
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MDK2 - come back to the darkening side! You can't just deny your past like that https://m.youtube.com/watch?v=G_hr6tig6A0
Ha! That's a lovely receiver. I wouldn't be in this hobby if it weren't for my dad's ancient Airline receiver from the 30's, but it has no functioning SW reception anymore, and I don't think the audio is as nice as it was on that one. Anyway, I do still like to attach the antenna to the Satellit 750 at times and just spin through the bands. It's definitely a different experience from looking at the waterfall.
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Good to hear the 750's not a shelf queen yet. 8)
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Good to hear the 750's not a shelf queen yet. 8)
Heck, I still use my battered homebrewed loops at times as well. Just decided to hook the first one up to the 750 and tune to Radio Guinea while using the SDR for other stuff. I have a hand-me-down DX-300 now too. Talk about spinning the knob!