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Just for info, I *AM* reading all this with interest, and still formulating my thoughts. Just a lack of time here, I can't devote every day to the same thing. It's day will come when I can start to

Beware that some eBay alternatives, e.g. from directimports1899, are wired incorrectly.

Alan, Thanks for the additional info. I understand what you're doing there, and can easily put the circuit in SimSmith and play with it. However, the original poster (Andy) indicated an interest in

A blue bridge can be rewired to work: * unsolder all coax wires near OUT * measure resistances from Input center pin to DUT and REF - should be ~ 50 Ohms but are probably ~ 100 Ohms - short resistor

Thanks. I had a blue one on order but have a green one on order too, now. At least they're cheap !

Hi Adrian - Blue are bad clones of transverters-store design and are wired wrong.

Looking at the datasheet I'm wondering if I am not mixing up two devices. Can't find anything there. Bridge design was a the green ebay resistive 3GHz bridge module driven through the REF and DUT

Why is a green reflection bridge better than a blue one ? (Presumably it's not just a matter of preferred colour ..)

Gabriel, Nice analysis. It will be interesting to see what actual changes make it into hugen's upcoming pcb modification where he intends the bring out the UART interface lines for users to experiment

Thanks Larry Jos Op 18-11-2019 om 20:23 schreef Larry Rothman:

Gabriel Did you take into account the fixed time offset between the + and - outputs of the ADF435x? I could not get good bridge balance but this was in a experimental setting -- NanoVNA Wiki:

Hello, There is a trick that is used by people that work on particular frequencies for example in power microwaves 2450MHz.(oven-people) They use a lambda/4 line at that frequency with a typical 50

Hi Herb, at that time, during the further development of EU1KY AA, DH1AKF conducted frequency extension experiments where the bridge circuit levels were modified. Simultaneously, he modified the

Group members who are into hardware experimentation might be interested in trying some of the latest improvements reported by Pmax65 at, " https://github.com/hugen79/NanoVNA-H/issues/14 ". He is

On Mon, Nov 18, 2019 at 07:49 PM, Roger Need wrote: "Sound like NooElec is selling an older version board. Anyone know what is the version number of the PCB? (3.1? latest is 3.3) Is this a NanoVNA-H

Dear Conrad, I'm a member of NanoVNA-F development team, because of BH5HNU's personal problem, the hamelec aliexpress store is no longer selling product now, but we'll reopen a new store soon, it

Sound like NooElec is selling an older version board. Anyone know what is the version number of the PCB? (3.1? latest is 3.3) Is this a NanoVNA-H or a clone?

Yes, I got the feeling that the -F version was a bit less advanced. I have the standard model, and will eventually upgrade, but I will make a decision about what to upgrade to later.

Here is a picture story presented as 5 figures which hopefully will clear some questions. In the five figures we start with a circuit representation of a dipole which is a bit unusual as it has a

Thanks for the clarification! For some reason the Version 2 devs think that they can only offer a $50. price-point device with a small display. For some reason they don't see that offering a "B" (or