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Bryan The attached drawings should answer your questions. The wire was bent to fit my garden. Performance is very good, with 100W SSB QSOs from my QTH near London to the US midwest, South America and

How high Barry?

So, it's just a tad too long to center on the band. But if you're a CW operator, perfect. Dave - W?LEV -- Dave - W?LEV

Thank you, Zack and Robin for the reply. I bought a NANO VNA and had second thoughts about using it to measure an AM radio station tower, given the presence of another local AM signal. I might make an

I just put up a full one-wavelength (140 ft) 40 meter loop antenna for NVIS over the MidAtlantic area. testing with my 3 yr old Nano VNA reveals no surprises using Nano VNA SAVER to make these graphs

Adding to Zack's reply, the first active device that the input encounters is an SA612 mixer chip. The data sheet (from NXP) suggests that compression non-linearity starts at around -30 dBm, and is -1

I believe it's 10 dBm (10 mW). Do you really mean 1000 kHz? That's in the AM broadcast band. That's a vertical of almost 250 feet. That will probably produce way too much overload. Zack W9SZ

Mike, Tell us more about your antenna. What length is your EFHW? Did your EFHW have a reflector stub of some length connected to the shield side or is it fed straight to coax? Any choke in the line at

You can do both. If you calibrate with the SOLT loads at the cable end you will get the antenna impedance. If you calibrate at the nano-vna end you will get the line plus antenna.

Pardon the basic question. What is the approximate maximum input port RF voltage before damaging the device? Let's say I hook it up to a tower in a location with about 100 millivolts per meter of

Thank you Roger, and your math example helps to clarify. Keith N3KXZ

The |S21| transmission coefficient indicates the insertion loss or gain of your amplifier on a linear scale. It gives you the transmission ratio (output magnitude/input magnitude) in the forward

Thank you Dave and Stan. So would the |S21| linear graph vertical axis have units? Or is it unit-less? (if that is the correct term)

I think in you saver graph that the |s21| plot is just the linear representation of the magnitude of the reflection coefficient (max value 1). The top graph, called logmag s21, is a logarithmic

No attachment. I'll try attaching the grahic. Dave - W?LEV [email protected]> wrote:

Here is a graphical - no math - representation of what the S-Parmeters indicate. It is usually assumed to be in a 50 +/- j0 ohm system. [image: image.png] S11: With the output (right side) properly

Here is a link to a nanovna-saver plot of my current IF filter: https://card16.com/if_filter-8-10.jpg The bandwidth is a bit narrow. How does the ripple look? A few basic questions: 1) What exactly is

The minimums are almost the same. . . thanks for the measurement. Vy 73, Roger DL2YDP

Second time lucky ... -- Mike G8GYW

Here's an EFHW I measured at the antenna and in the shack. First I calibrated the NanoVNA at the far end of the feeder (18 metres long and about 0.5dB loss) and measured the VSWR there. Then I