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Thanks to eveyone gave an answer ... Of course I realize the Bias is affecting the Input (and output) impedance of any device ... BUT WHY ??? I intend to highlight my P.A. is a A/B Class RF Amplifier

The term "Return Loss" wasn't invented yesterday. It's an engineering term that's been around for decades. It's just like the concept that electrical current flows from positive to negative. These are

If it breaks i

Peter, you haven't indicated whether the amplifier is linear (class A or AB or B) or class C (for FM or CW). The circuit operating conditions (class, signal level, bias, Vcc) make a big difference.

Well, since you are being pedantic (don't get me wrong, I like pedantic, it helps add clarity and reduce confusion): Exactly Now you've got it backwards again. Return signal is attenuated by some

I have been wondering for months why I object to RETURN LOSS being a "positive value". Yes, we are talking about a LOSS. And of course the formula shows RL = -20 log (rho) Since rho is a number

Hi Peter, every amplifier (Transistor or Tube) will change its input (and output) impedance due to bias. So input (and output) impedance of impeadance matching network as shown in your picture will

Sure, a couple of possibilities: 1) When your power supply is off it's a high impedance, and when it's on it's a low impedance, so you are at the very least switching in another inductor. 2)

Hi there ... Appreciating several features of this incredible instrument, I'm attempting to check the real Impedance of the Matching network INPUT (and/or out-put) value associated to a VHF RF

Barry, Many Thanks, I will distribute this to our Club since many have shown interest in the Nano VNA but have avoided purchasing since so many "fake" units are marketed and we are assisting in

Thanks. I liked you ppt files. Gustavo Em Dom, 27 de jun de 2021 14:01, Barry K3EUI <k3euibarry@...> escreveu:

And here is last weekend's ZOOM talk on Nano VNA Part II (Under the Hood Advanced stuff) This is about as far as I can understand - right at my envelope of understanding. Watch this video if you have

I added a strap of anti static foam between the bottom and top after the I took the attached pic.

it's more, as fonts. please read change log to versions 1.0.50, 1.0.53 and 1.0.64: /g/nanovna-users/files/Dislord%27s%20Nanovna%20-H%20Firmware

Very Helpful. If it's only the font issue and no major functional improvements, I might just not update it.

Clever idea... Roger

Version 1.0.45 is the latest firmware released by Hugen for his NanoVNA-H. It has a lot of features and I suggest you get used to using it before you even consider updating your firmware. The Absolute

please compare two screenshots of Hugens 1.0.45 and DiSlord's 1.0.64

and important for beginner: /g/nanovna-users/files/Absolute%20Beginner%20Guide%20to%20The%20NanoVNA

Hello Brumey! In the files section ---> /g/nanovna-users/files/Dislord%27s%20Nanovna%20-H%20Firmware Last version for both - NanoVNA-H and NanoVNA-H4 from DiSlord. Or here