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Internally-matched power transistors use the internal bond wires as high-Q inductive elements. In conjunction with MOS capacitors they are used to build matching networks inside the package to bring

William, This might be due to the case pressing on the touchscreen Try loosening the mounting screws or perhaps adding thin washers for spacing. --John Gord

Have an old NanoVNA H with the above FW whose display is intermittent. More specifically, the menu turns off and on or will revert to the main menu. I have tried to do the touch cal and touch test

Hi, Brian, I still have mine with the matching speaker. Mine is an NC-183, not an NC-183D. Like you, I really loved that thing. Even now, the sight of it here brings back good memories. But I

Maynard, I bought a NC-183 to replace my S-38D in the early 1960s. I just loved that big receiver. Brian

Hi, Ed, That's true! I remember hearing the phrase "you can work the world with watt and a wet noodle," but I didn't fully understand what was going on at the time. I did cut an old broadcast

I had guessed the DC block above SRF might be useful even when C was not the LF value. Thanks for the insight on R and L, Alan. Brian

Well.....here's another one for you: SM inductors. Most of the suppliers quote Q at 1 MHz. 1) The RF "resistance" (due to skin effect) should be used instead of the DC resistance. 2) Outside of

This is common practice in microwave power amplifiers and and some MMIC designs as one component brings in two. The R and L for above SRF of the C serves as a DC block while adding a stabilizing R

That's what I finally guessed designers must do. Check out the Y21 method plot for capacitance I just posted for a different capacitor. Above the first two resonances, capacitance returns to a

After looking at more .s2p capacitor files, I've concluded that the file comments refer to the measurement frequency range, not the recommended frequency range for the part. I've attached

To elaborate on this a bit. Let’s think about a standard 0602 sized part - that’s 0.06” long or about 1.5 mm. A piece of wire that long has an inductance of about 1.5 nH. With, say, 33 pF,

Grand! Thank you.

The max frequency is probably more about where losses get too big. And they’ll measure for a very wide range. Most design tools can deal with staying away from the SRF, if supplied with the part

Yes, it is Zack W9SZ [email protected]> wrote:

By coincidence, I just added an image showing capacitance and dissipation factor plotted by my S-parameter plotter. It was derived from an .s2p file provided by Kyocera. Scroll to the last

Is the measurement frequency stable? Dave ZL3FJ

I have consistently had this problem measuring inductors, capacitors and resistors. Just recently I measured a silver mica capacitor that was around 3400 pF. I measured at 475 kHz (630 meter amateur

I live in a quiet neighbourhood; the antenna measures 8 cm from tip to tip. I shall take some measurements at the countryside and report back when I do.