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Mark, thanks for posting this (you beat me!). Looking at the drawing in your first link, it's possible that my copper foil connects to the RF line rather than ground as I had described it.

I made a poor man's sampler.? I just put a loop around the coax and connect it to the scope.? There is plenty of rf even when operating barefoot.? Bob K6DDX

Max, how much power are you driving? I hate winding toroids, so for my transmitters in the 100 watts range, I just make a simple voltage divider (e.g. 10K & 50 ohms). 1 watt for the 10K should be fine

This is an example of an RF tap used for sampling a signal. https://images.app.goo.gl/1XJzAVigBmW3poEZ8 https://www.cwtd.org/Jul%2017.html 73, Mark WA4KFZ

Try randl.com

If you just want to monitor what your antenna is radiating, a 24" clip lead formed in a loop works fine for RF pickup into an o'scope. Connect one end of the clip lead to the BNC backshell and the

/g/NanoVNAV2/message/1147 wrote:

Sorry for the confusion on my part. I had forgotten about your measurements being for the bifilar wound CMC, not a coax choke one. G3TXQ said the RG-58 could be replaced with RG-400 with little change

An article on this type of sampler is available here: http://www.collinsradio.org/wp-content/uploads/2015/05/Build-a-Quality-RF-Power-Sampler-Jackson.pdf Gary W9TD

I believe that someone on this group sent an email to the group several days ago with an attachment which showed the schematic of and a photo of an rf power splitter using a couple of small ferrite

I need an RF sampler of some sort for monitoring my RF signal. This might be used with a scope or TinySA or ... Is something like this what I need? If so I'd prefer to build by own if I can get some

On Mon, Feb 8, 2021 at 03:02 PM, David Eckhardt wrote: David, Thanks for: "our measurements look much like mine." Followed Yours and K6JCA, W2DU, G3TXQ and other Experts recommendations... only with

RAR is an archival file. You must extract the firmware file from it first. I think 7Z will open it for free. You can do a search for others. WinRAR is not free.

OMG!! No topic drift, no politics, no name calling, just chat about our favorite topics! There _are_ some reasonable people left alive!! I have found my nirvana on groups.io... What a wonderful group

Don, I absolutely love your tongue-in-cheek (well, I do understand) response! I really do!!! Some of us had to suffer through learning calculus and then applying it to electromagnetic theory and

As a non-engineer (of any type) like other nano-users, the simple mission was to wind some coax or wire around a ferrite donut installed on our OCFD and stop the nasty, dreaded, feared, sneaky and

Your measurements look much like mine. However, as has been previously pointed out, your power calculation is in error. 77-watts is the correct value. Dave - W?LEV

Thanks sir!!! 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources

There is a limited listing of εr for a few common dielectrics in any ARRL Handbook. For a more extensive listing I'd refer you to the CRC Handbook of Chemistry and Physics published by the CRC Press.

Hi, Thanks for the detail!!! If you find that study on various dialectic values for various materials, I would love a copy... I am making some VLF and HF ferrite bar antenna, and using CPVC to protect