SDR# (SDR Sharp) with the Airspy receivers (HF Discovery) have the RF spectrum display, IF passband display and audio frequency spectrum display. The audio part may be what you are looking for. 73 Ro
First, there's nothing wrong with American Standard as far as I know, which is a premium brand manufactured in Texas by Ingersol Rand. Forced air A/C in the home, almost always uses the same air blow
Not everything is dependent on some tightly defined rise time. I have a DX Engineering NCC1 phasor box here that had chattering relays inside whenever I operated on 160 m. with a 300 watt carrier. I
My city is in the process of converting over to LED street lamps from the gas/vapor lamps that require h.v. to fire. These lamps are a nuisance because when they start to fail, they cycle off and re-
Sadly, the qrznow article covered everything except what is really interesting: the mode by which the seemingly incandescent "vintage" bulbs radiated RFI. 73 Rob K5UJ Vintage light bulbs were the ult
Thanks Ed and others. Looks like a problem for VHF hams. https://www.amazon.com/CTKcom-Nostalgic-Tungsten-Incandescent-Industrial/dp/B06XDBDTGN/ref=sr_1_19?qid=1585791373&refinements=p_n_feature_thre
You can spend a lot of time messing around with the stove and wind up with a piece of modern day consumer low quality that will last a few years, or you can ditch the stove by returning it for a refu
If you are lucky like me and have not yet been exposed to the havoc of solar inverter RFI, take a look at this YouTube video of SDR screen shots. It shows vividly what an absolute nightmare this is o
I will never let go of my 1949 Norge gas range. Rob K5UJ _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi
I own a 1997 Camry V6 with 5 speed manual xmission. I had ignition RFI on the car radio medium wave band. I like to tune in distant stations on ground wave, especially those at the low end of the ban
Kitchenaid made in China. Not surprised. Maybe you can find a genuine KitchenAid somewhere second hand. I wouldn't be surprised if the noisy circuit has mounting holes on the pc board for RF suppress
You're probably okay with any small 8 or 10 watt push pull mono tube amp. Look around for a vintage one that needs work. These are simple circuits that only need the usual restoration such as recappi
I think I misunderstood the request. I thought station transmitted RF was getting INTO the audio amp and distorting the audio. I did not realize the problem is that the audio amp is the SOURCE of RFI
Ebay. Search for tube audio amplifier. Most of the results will be crazy over priced. Look for a junker that has to be fixed up. Some of the old brands are Heathkit, Eico, Grommes. Lots of Heathkits
The problem with solid state is that if the RF field is strong enough, a cheap analog solid state amp will pick up enough RF on the internal leads and the transistors will rectify it. This is especia
Awesome. It would be interesting to open up one of those Bose cabinets and see what they did inside to make them immune. 73 Rob K5UJ _______________________________________________ RFI mailing list R
Golly, the plan to make everything as expensive and complex and prone to crap out as possible as found of all things, the simple gas water heater. What's next? Lawn mowers probably. Of course consum
I second the advice on taking a portable sw receiver to the store. Around 7 years ago I took my Grundig Yachtboy receiver with me to a Best Buy. I didn't plan on making a purchase. I wanted to try to
Thanks for comments. Epilogue: I tried to buy the neighbor's plasma TV; offered to buy them any new TV they wanted as long as it wasn't a plasma and give me the one they had (so I could scrap out par
I've been telling hams for years that they can do a lot with small chokes placed strategically in DC lines, but no, they'd rather blow hundreds of dollars on the amighty ferrite miracle stuff. Merry