Hi Greg, I also have an SAA-2N which I purchased from R&L about 3-years ago. I’ve been updating it pretty much every time a new firmware version comes out, and have flashed new firmware into it at

I apologise for breaking into this topic. I wish to start a new topic but cannot find a link to do this. Both the tinySA and marconi instruments groups.io have this facility. Thankyou Phil

I purchased a SAA2N from R & L in 2023. The actual unit was mfgd by Zeenko. I have FW Version 1.3.07. Can anyone confirm that I can upgrade the firmware, what the new version is, and where I can

Jim: I have a number of HP and Narda N-type attenuators. If, for example, I use a 30 dB attenuator (60 dB RL) within its rated frequency range as a load for cal., where is the measurement plane? I

A couple tricks here: 1) if you've got an antenna hooked up that's moderately narrow band (match wise), do your return loss measurement well away from the design frequency. 2) TDR (computed from

Hi Terry, I have measured the performance hundreds of older coaxial cables. I have found that return loss with the end of the coax is mismatched into an open or shorted load detects deterioration

Set the frequency WELL below the electrical 1/4-wavelength (in the cable). No need to short the far end of the cable. You can make the measurement with the far end either open or shorted. However,

Short the cable and measure the SWR. Then convert to return loss and divide by two. https://www.everythingrf.com/rf-calculators/vswr-to-return-loss-calculator

A return loss bridge. I built my own, decades ago. It was for 75 Ohms and fixed frequency. I used it to troubleshoot some horrendous MATV systems in local school systems. They had let their

Hi Terry, Some of the responses you are getting folks don't understand what you are trying to do. It is correct Return Loss for looking at SWR or Impedance is two way loss, but you are trying to

Return loss is loss going both ways. Don't divide by two.

Thanks for the reply Don, I am trying to determine if the buried hard line is bad, and what the rtl is at 50 mhz which I believe should give me a good

Punch out the plastic and the pins to reduce the wear of the standards. <landrjoh@...> wrote:

Are you asking about adapting the nanoVNA to the hardline connector? Otherwise, since return loss is a one-port measurement, and you have one port accessible, I do not understand your

Consider checking for an unexpected resonance in your balun or choke, which might overheat if operated in a resonant condition. This has happened to folks who tried running old non-WARC tube

I got tired of trying to keep track of all those little SMA calibration standards and adapters that I keep with my NanoVNA, so I made a thing! It's a small pcb that uses common 1/4" wide edge mount

Not necessarily 130 feet. Could be as little as 70 feet (20 meters or so) and present itself as a 1/8 wavelength, low radiation resistance, low impedance, and with sufficient CMC radiate from the

Not necessarily 130 feet. Could be as little as 70 feet (20 meters or so) and present itself as a 1/8 wavelength, low radiation resistance, low impedance, and with sufficient CMC radiate from the

That would have to be a coax cable run of some 130-feet in itself. No doubt just an UNUN / autotransformer at the feed (the 50-ohm side of the 49:1 UNUN) will not isolate the outer surface of the

just a guess the antenna "thinks" it is a quarterwave (and maybe uses your coax as other half??) dg9bfc sigi Am 21.07.2024 um 14:01 schrieb Barry K3EUI: