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- Опубликовано: 18 окт 2024
- Episode 631
Using an E field probe on my ME40+. This allows non-contact measurements of the circuit. The probe allow very fine pin pointing of RF sources. making probes: • #310 making E and H fi...
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I fully agree with you, these are your videos and you do whatever you like! I really enjoy your relaxed approach to RF! its fun, its a very good way to learn, thanks, best wishes!
Thank you
Thanks! Exactly what I wanted to see.
Not part of the *regular* RF Police but I do serve on their reserves from time to time. Seriously, I enjoy your videos because of the joie de vivre they express -- as the Frogs would say. In any case, you do show an incredible desire to measure/verify/validate stuff with an incredible assortment of complex equipment and I wanted to back down the panic level of your audience somewhat. I am certain you know that checkout of these little single board QRP radio kits can be done with little more than a VOM, DMM, RF probe, and similar. Nice-to-haves are a scope and a signal generator of course but I prattle.
My real point is that the the ME-##+ kit you built is descended from the old Small Wonder Lab kits Dave Benson (K1SWL) used to produce back in the mid-90s. Dave and Wayne Burdick (N6KR) and others like Doug Hendricks (KI6DS) and Jim Cates (WA6GER, SK) used to rock the pillars of heaven with items like these that kept our irons perpetually toasty and the solder smoke wafting across the bench.
Dave offered the SW-##+ kits and others to us for a song and, remarkably, the Midway Electonics gentleman -- operating with permission from Dave -- has recreated these little gems for folks nowadays for pretty damned near the same price that Dave charged.
You, sir, have a piece of history in your hands and your excellent work in banishing the ignorance surrounding the NanoVNA is adding to that. I did a couple of reviews on the ME entity and the 80-meter version of same for anyone interested. Your viewers are also welcome to stop by and peruse my blog and see my past and present adventures. I am sure that future posts will include my hearty thanks to your videos for your clearing away the clouds of mystery of the NanoVNA.
"Seven Thirds" de k6whp
dit dit
Midway Electronics:
midwayelectronics.us/qrp
The Right Hand of Zod blog:
righthandofzod.blogspot.com
The Right Hand of Zod Midway Electronics review:
righthandofzod.blogspot.com/2020/03/living-in-past-dave-bensons-sw-radiops.html
The Right Hand of Zod ME-80+ review:
righthandofzod.blogspot.com/2020/04/midway-electronics-me-80-kit.html
Yes "I know you can't", but in my home shop environment with limited resources I do what I can with what I have. That said I think the important thing is to be aware of possible problems and look for their symptoms in your results. I remember the old days when "HAM's" actually built their own RF equipment that glowed in the dark. Thanks for sharing and keep "em" coming. Aloha ke Akua
Other commercial probes to consider are ones made by Auburn Technology Corp. I have the P20A 3 GHz version (the more expensive P20B goes up to 12 GHz). It's a passive probe that has a 50V DC block and a 10:1 voltage divider. They're not cheap ($195) and as pointed out you can roll your own as I did for my IFR 1500; a simple small and large loop at the end of a piece of coax works surprisingly well. The Beehive EMC probes (and others) are another way to probe the E and H fields although you may need a amp in between them and your SA.. As with all test gear you get what you pay for but having said that homebrew stuff can provide satisfactory results as long as you're aware of their limitations. The "RF Police"...cool, like that! ;-)
I'm too cheap
Dude... let me qualify what I’m about to say here. I love your channel, always watch your stuff....
BUT... Waaaay too many RF related videos now !
I good mix of different subjects maybe ?
Initially I subscribed to watch your vintage computer stuff, the occasional optical, RF and audio video was a nice diversion and very entertaining.
Could you mix it up a little ? Lol
Ps. I guess you could always change the channels name ? RF guy ?
I hear you. The TinySA derailed me. I will be doing a series on non-rf stuff starting in a couple days. hope you enjoy and thanks for watching
Oh, and 80% of my channel views come in via searches on NanoVNA or TinySA.
I like the RF videos.
Could you talk more about LNA's and how they are used for probing with a Spectrum Analyzer? Can a Tracking Generator take the place of a LNA or active probe? How do you prevent blowing up the front end of an SA when working with radio receivers such as fm or higher? Lots of questions, plenty of time to learn.