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Hi Gabriel, I found that simple ESD foam acts as quite good EMI absorber, give it a try and insert some of it between/above the cans.

Tried a TCM1-63AX (had these in stock), it gave really strange S11 graphs and not good directivity. Might investigate it further. Crosstalk between microstrips or grounded CPW is low in theory, but my

EBay has a disputes procedure which I have used many times. Every time I have used it, the case has been resolved to my satisfaction, with either 1) Return item at sellers cost for a full refund. 2)

I've screenshotted the Number 8 and 10 of the new version (serial LC and L): The capacitive parts at the bottom are good, but the top side isn't it. The measurement with the professional equipment are

Aha! There is so "matching" if there is a network involving reactive components, regardless of the designer's intent for the operating frequency. Also, if the cable between the DUT's output and the

The wiki at /g/nanovna-users/wiki/jog_switch has a link to OEM multi-directional switch

This is why I reflashed my Acer chromebook with GalliumOS. Since it's a Linux distro, it isn't dependent on talking to the Internet to function. I still have a newer ASUS Chromebook that does

HI Chris, The Smith Chart is a plot of the reflection coefficient, gamma. Gamma is a ratio as follows: The voltage across the transmission line due to the reflected wave divided by the voltage across

The attenuator should be placed at the output of the amplifier, not the input of the VNA. Output attenuation is a technique used to assure an amplifier remains stable throughout its gain/bandwidth

S21 is likely peaked due to the self resonance of the inductor in the drain/collector. -- *Dave - W?LEV* *Just Let Darwin Work* *Just Think*

I got so curious that I had to test a 10dB attenuator as David Eckhardt suggested even it is late here. The gain went down 10dB which is good I think, nothing changed much. I noticed that S11 is

Hans Your suggestion would work if you know how long the transmission line is in wavelengths. How can you simply measure the impedance at the shack end and know if the impedance you measured is due to

Oh, I'm lately working at < 10 MHz and am satisfied to get with 10% of expectations. I wish nanoVNA worked at < 10 kHz..

Wow! I'd say that S11 is not the only strange thing here. For example, why is S21 so peaked? When you say "no matching" does this mean that the input is applied directly to the base (or gate) and that

Looks *much* better! Now, for results? Dave - W ?LEV -- *Dave - W?LEV* *Just Let Darwin Work* *Just Think*

I evolved from Mickey Mouse "tails" to Donald Duck bill:

Thanks I will.

There are several SMA board edge connectors on Ebay. There are models for 1.6mm and 1mm thicknessess. And of course normal models for soldering into board.

it looks like oscillation. Connect the output of the amplifier to the VNA through a 6 or 10 dB attenuator and have another look at s11. Dave - W?LEV -- *Dave - W?LEV* *Just Let Darwin Work* *Just

This is probably not NanoVNA specific. I made a quick and simple amplifier of leaded BF199 and some passive components. Collector is via a coil I happened to have. There is no matching. Input is