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I can pull mine apart and see if I can come up with something. I agree, the "external" parts need dome protection

Some people don't have the "ability" to modify that box. This way, if you just wanted to add a (or bigger) battery, it is only 4 screws and double sided tape (which I could probably throw in).

There is some value added packaging if it can be done at a reasonable cost. The slide switch and the rotary wheel switch are subject to failure or breakage. Especially when used in the field. The LCD

I think it depends on the battery. I'm looking for "surplus" batteries to keep the cost down. I had mine open, and never looked to see the mAh rating on the battery. I figure under 1000mAh should be

Folks, Instead of reinventing the wheel to design a case, have a look at the 1553BBK series Hammond housing. It's approx $12 CAD. It looks like a small amount of internal trimming might be needed but

I am still interested, depending on price. Norman Eric Haskell, KC4YOE 3709 Oakbriar Lane Colleyville, TX 76034 USA ________________________________ Sent: Thursday, July 11, 2019 7:25 AM To:

If anyone is interested, I'll find a battery and make up a package with screws and figure out a price. I can make the backs in black or white (or other colors) Frank

In this video, Alan also correctly designates the IF BW as Resolution BW in his notes.

Spectrum (and Network) analyzers have multiple up/down conversions in their RF chain before reaching the last IF section. The IF BW of those middle converters (before the last IF) is fairly wide

Another video nice video explaining RBW is this one https://youtu.be/Ffhs9Ny03lM

Resolution bandwidth. This video [1:50/5:14] uses an example of a 300 Hz RBW to resolved equal amplitude signals separated by 1 kHz: https://www.youtube.com/watch?v=nht9nGEzoQM Nope. Traditional

Nice job!

The IF BW is " intermediate frequency bandwidth" What does RBW stand for and is it the same as IF BW ? Thanks in advance Greg

My last message was meant in response to Oristo. Forgot to quote it. "Use of 74LVC4066 Quad bilateral switch instead of SA612 mixer is elegant; given square wave Si5351 output, its ideal mixer becomes

It might also be better to redesign the resistance bridge for wider impedance measurement. Current balanced 50 ohm bridge, NanoVNA design, does not have wide range. The FA-VA5 and EU-1KY antenna

I would think that just putting resistors in series with each side of the crystal would raise the impedance enough to unload the Q. I would start with 1 K ohm on each side (for the series

Yes, because of the strong impedance mismatch between the crystal and the VNA there may be some passband ripple. But it is still instructive to see what the passband curve looks like with closely

A thought experiment and an issue with comparison of the single crystal with the matched filter counterpart. A single crystal in series mode is embedded in a 50 ohm system, in this measurement.

Thanks, George, for the FA-VA5 video hyperlink: https://www.youtube.com/watch?v=X8Z7veGV57o Use of 74LVC4066 Quad bilateral switch instead of SA612 mixer is elegant; given square wave Si5351 output,

Here is some information on phase noise on the chip, Si5351A used in the VNA. It is reasonable, nothing extraordinary, however, the loop configured in the VNA may do some noise correction. In any