The QRPer Board

I finally got my DX-FT8 https://github.com/WB2CBA/DX-FT8-FT8-MULTIBAND-TABLET-TRANSCEIVER/tree/main assembled and on the air yesterday. It's a low power (less than 1w on all 7 bands) FT8 only rig that runs its software on a microprocessor - no computer required. It has two modes of operation. One is...

First I've heard of it. If you have a 3D printer, take a look at K6ARK's designs at https://www.printables.com/search/models?q=k6ark . I use his single lever design for all my portable kits. I've printed a bunch and put them together as needed. The cheap, simple and good enough for me. He even has a...

I received the QRP Pocket Tuner kit from Barb, WB2CBA last week. It's a credit card sized T-network tuner designed to handle QRP power. It took less than an hour to assemble - all of the inductors and capacitors are pre-soldered SMD parts. You just add the switches and SMA antenna jacks. One I had i...

Maybe connect the dummy load to the output of the unun and try again? It won't have a 1:1 match, but you'd see if the SWR remains constant over the range.
How does the unun do with an actual wire attached? And did you find a capacitor or not?

73,
Mike, KL7MJ

Mark,
The website is still at https://azscqrpions.org/ but it looks like they're not producing any kits these days.
Hope this helps.

73,
Mike, KL7MJ

I am looking to build (yet another) 4:1 unun for a Rybakov antenna. Looking online, I see about half of the articles recommend a TX-2 toroid, and half recommend a TX-43. I would think that the TX-2 toroid wouldn't be great for the hgher bands - if a powdered toroid were needed I would have expected ...

Geoff,
My understanding is that the capacitor helps on the higher bands (15/12/10m) but is not necessary for the lower bands. I usually use a 100pf cap in my builds, but I've never really tested its importance.

73,
Mike, KL7MJ

Brian,
My home antenna is a 35.5/17 EFRW. It works pretty well on all bands, but tuning for 40m is very touchy. I'm thinking of going with a 33 or 35.5 foot counterpoise.

73,
Mike, KL7MJ

Doug,
POTA Is a great way to develop CW skills. The exchange is simple and there are a lot of stations to work - and they are very forgiving of newer/slower stations. Also, I need to work a park in NJ!

73,
Mike, KL7MJ

I got all 13 QRP two years ago. I started out on FT8 but needed CW to get the last couple of states/colonies.

Mike, KL7MJ