There's very little difference between a series and parallel RLC circuit by themselves. With a series circuit, the Q is X/R, where X is the magnitude of the reactance of both L and C at resonance. For

Note that when the load looks resistive the VSWR versus frequency is at a minimum.

That's a good trick, though, for measuring the attenuation of a long cable where one end is a long way from the network analyzer.

Thanks, mine was the smaller screen version, but the AURSINC version was complete with battery and shielding. I find it convenient to use it with my laptop, but I haven't taken it into the field.

Robert, Which one did you get? I made a purchase several months ago of the one sold by AURSINC. Thanks, Jim

This is a good tip. Just remember that the feedline is only a multiple of a half wavelength at one frequency. If that's the center frequency of your antenna then the impedance at the end will be the s

To find a series resonance you are looking for the frequency where the impedance is a minimum. All three techniques you suggest will work. 1. Series between two ports, look for the frequency of maximu

Minicircuits has a SSG-4000HP generator that is similar, except it covers 250 MHz to 4000 MHz and is a lot more expensive.

I found it on Amazon. I don't know where else you might find it. 73 de K9GXC, Jim

I bought the one from AURSINC. The price was $73, but it had the input shields, and works fine.

I'm thinking of changing my subscription to the daily or 12 message version. Right now I'm somewhat overwhelmed by the continuous arrival of individual messages. I am ambivalent about subgroups as lon

The S Parameters are defined in terms of a circuit within a closed box. Snm is the amplitude of the signal coming out of port n relative to the signal that went into port m. Thus, S21 is the signal th