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Hi Dave, good work, but some pics can't be displayed over here. Do you think you can provide this document as PDF please? Thank you. Carsten, DL8AAP

Not quite. You don’t need MS Word to read .docx documents on Mac OS. There are a few other ways: - Apple’s word processor, Pages, can open them too - Even TextEdit, the basic text editor included

Thanks, Zack! Very interesting. I shall have to listen for them. Thank you! Dave

The 13 MHz beacons are legal under Part 15. They only run a couple milliwatts. https://www.gpo.gov/fdsys/pkg/CFR-2011-title47-vol1/pdf/CFR-2011-title47-vol1-sec15-225.pdf W1TAG has calculated that the

Not so: §18.305 Field strength limits. (a) ISM equipment operating on a frequency specified in §18.301 is permitted **unlimited radiated energy** in the band specified for that frequency. (Emphasis

I'm having lots of trouble with my local area coverage. Neither my multiband HF vertical (a CHA-250B with its base mounted about 14ft above ground) nor my G5RV dipole in roughly NVIS mount with 100w

Yes, RFID uses the 13.56 MHz ISM band (yes, I've worked professionally there, as well....), but energy is closely coupled only inductively - NOT in a radiative manner. Some 'uninitiated' engineers

Jim, I've usually used a capacitive probe for the purpose at home. That means a very short probe above an image plane or a very short dipole as a function of the wavelength of the highest frequency

In order to do the S21 series method of determine complex impedance you need the Port 1 (CH0) and Port 2 (CH1) impedance to be very close to 50 ohms. You also need to be able to do 10/12 point error

I'd like to start a discussion about using the NanoVNA (or NanoVNA2) in the context of a backyard antenna range.? One of the tricky things about doing antenna measurements has always been the whole

Hardware capability? What are you referring to?

It is legal to run an unlicensed transmitter on 13.56, as long as the power is low enough (i.e. meets Part 15). A few mW is typical, and as sunspots heat up, you could "work the world" with suitable

What the dickens are "Squarers"? I'll confess the ISM bands are a good place to hide possibly illegal and unlicensed emissions. However, as a licensed ham for some 61 years and worked professionally

Gary, IF the alternative RF path is down a pair of antenna wires near a feed point where the equivalent impedance is ~75 Ohms, then 3K ohms looks very good. On the other hand if end-feeding and using

RFID uses 13.56 MHz with radiated fields (limited, it's true), but all those "near field communications" things are also 13.56 (Subway cards, cashless payments, etc.). If you're making a "long range"

Dave, The measurement of common mode attenuation as it pertains to baluns and RF chokes has been discussed in this group several times and there is a lot of good info in those posts. Reading through

Probably has nothing to do with his use, but 13.56 MHz and surrounding frequencies on shortwave are the homes of many unlicensed CW beacons. Many are "squarers." Zack W9SZ

13.56 MHz is an ISM (Industrial, Scientific, and Medical) frequency. There are 7 frequencies allocated by the FCC for that purpose in that specific ISM band - in a NON_RADIATIVE MANNER. Why are you

It isn't clear to me what the situation is here. Do you mean you have an antenna connected to a 13.56 MHz signal coming from a signal generator or transmitter of some sort, and you wish to transmit

For those that may use Google, Google Docs will read and create DOCX files. *Clyde K. Spencer*