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No prob

I have used a similar switch and it should be better. https://lcsc.com/product-detail/Multi-Directional-Switches_Korean-Hroparts-Elec-K1-1502SA-02_C128929.html

Printed it, fits well for my version. Thanks, HexAndFlex! 73 Mike AF7KR

The better choice would be to order part #C128928. It is much less fragile. John

Steve, Mine took exactly 3wks from order to delivery from elecdesign2015. Hope that helps.

How long did it take to get the VNA from Seller: Elecdesign2015 ? Thanks, Steve_WB8GRS

Directional couplers using opamps or instrumentation amplifiers have been successful used over a very wide bandwidth as DCs. I will see if can find a link. Stuart K6YAZ Los Angeles

Peter, See my message #1252 and the LT Spice schematic attached. There I reference Dunbar circuit. If you change Ro to any suitable value, ohms to k ohms, you can do VNA instruments to suit any

I built something like that a while back out of resistors for 8 ohms with the signal drive before the audio amp.? The sweep was rather annoying but you could definitely see the difference if you

Unless I'm doing something stupid (which is entirely possible) or have been very lucky it may not make very much difference which clone you buy (as long as it has a battery and the soldering is ok!).

Yes I think you are right - mine are the generic case. Having the A terms gives full flexibility. It means anything can be used as a standard - you just need a sweep of it from a properly calibrated

The bridge theoretically works down to DC the problem arises from the need for a balun or a transformer (depending on which way you want to implement it) to get rid of the common ground and that

Have you looked at this thread? I know it is for the analog discovery, but I used that below 25MHz before I got my NanoVNA. The same principles should apply.

Can one find/build/.. directional couplers that work well over an extended high fidelity audio frequency range, say 1Hz to 100kHz? With such directional couplers and a few easily obtained relays one

Actually, it's obvious that the one that doesn't have an insulator around the center pin *has to be* the short. wrote:

An Ohmmeter will tell you very quickly and be a definite answer. Glenn -- ----------------------------------------------------------------------- Glenn Little ARRL Technical Specialist QCWA LM 28417

Silver with pin is the 50ohm reference. Just use all 3 on the nano VNA when you switch on, and you will see on the Smith-chart, whist one is closest to infinityy, which one is closes to short, and

Hi Nigel, Greetings from an ex-saffer. Hope the postal service gets your Nana-VNA to you soon.... know the angst of having stuff shipped to SA, never knowing if you will get it. Great little gadget,

Hi Nigel I did order mine through Banggood as they use a courier service to South Africa now. Most items you will recieve in ten days and it is deleiver to your front door. I did have too many missing

Greetings Larry from sunny (it will be tomorrow!) South Africa :-) Many thanks for the link to TomTop, have just placed my order for a NanoVNA <HUGE smile>! Shipping ANYTHING to this part of the world