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PS - the NanoVNA-F is about 4 times this size of the 2.8 inch model, and 4 times as heavy (BIG battery).? It might not fit into a shirt pocket, like the 2.8 will do easily. -- Doug, K8RFT

It is not the one I have. but it should be sufficient.? Aursinc? has sold many, from what I have read online. The originator and "official" maker is Deepelec.? The Deepelec might be best if you

Greetings:? Could you tell me how to increase the keyer sending speed?? I have an outdoror version with no instructions.? Thanks? Larry Hamre AI9N-I use the x5105, forgot to mention.

Wow, I guess I can't complain. Will probably verify readings with NIST voltmeter. 73

I didn’t know it would work below 11.8! Mike

Does anyone know what the lowest battery voltage can be for operation. My unit shuts off at 11.0 volts. Is this normal?

So you all got me curious about these unun 1:9 antennas. ?Looked at a few videos and took account the warnings. ?I felt like the transformer design is like the ghost buster “never cross the

I suggest you consider getting a NanoVNA.? They are cheap, starting at about $50.? For outdoor use, the NanoVNA-F has a different type of screen that is much easier to read in bright light, and the

Brian, that is also true with the Sotobeam mast I am using as well. Also, the last section at the top is so small in diameter and so flexible that I simply do not use it in fear that it will not

Another option that is slightly heavier and about longer collapsed are the carp fishing poles. The advantage with them is you can hang a light weight antenna about 20 ft in the air. (They extend to

Dan, here is the link for the one I have that is super light, 300 grams and compacts down to a small 18” packable size. There are many other portable mast that are longer, stronger and heavier but

Thanks for making this post.? Can you post a link for the 19’ carbon fiber mast 18telescoping sections, weighs 300 grams and packs at 18””? Thanks & 73 Dan WD4IRK

Sourcing Out parts is a commonly used term meaning to locate a particular part. Example: ?an auto repair shop is sourcing out parts for a customers vehicle. Probably not used in ham radio, so please

(Grammar note:? a "source" is where something comes _from_; to source means to supply.? Like a "water source", or "source of my joy".) From what I've read about these antennas, you only need the

I found these two references helpful when deciding the length of my end fed antenna installed as a

KG2RG I believe typical impedance for an endfed halfway is 1500-5000 ohms.? A 49:1 transformer is simple to make,, I use a type 43 torroid and 67 feet of wire.? ?It's resonant 40/20/15 and 10.?

Doug, A super light weight random wire is my next project. I have those tiny ft50-61 toroidals (super small) and some 28 gage enameled magnetic copper wire. I just need to source a 100pf capacitor at

Brian - There are some very interesting, very small amps on AliExpress, available in different levels of completion (as kits, or assembled, with or without case). -- Doug, K8RFT

Random (NON-resonant) antennas are typically around 400 - 600 ohms and would use a 9:1 transformer. Resonant end-fed wires tend to be in the 3,000 - 5,000 ohms range, and call for a 49:1 or 64:1

Bob, I am in agreement with you on the difference between 75 & 100 watts. I also agree that an amplifier for a QRP radio should be for getting a little more power when 5 watts is just not enough. I