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The small holes are vias. They connect the front and back of the board together using the plating on the sides of the holes, allowing a trace to continue on the other side. It's sometimes necessary to

The ex equipment gel cells have a "guaranteed" lifetime of 5 years if you look at the manufacturers spec sheets. Even with little use and just on trickle charge that's about what I see before they go

While building one of the first QCXs recently I use a lot of magnification. While doing that I saw all these little dots in the ground plane (that don’t go through the board) and even some very

While building one of the first QCXs recently I use a lot of magnification. While doing that I saw all these little dots in the ground plane (that don’t go through the board) and even some very

Mains cable to the shed?? Yes, good idea, but to be legal it would need to be installed or at least inspected by a qualified electrician.? And even with mains power, you still need a data cable to

Hi Alan, correct, but you can buy a RTL SDR usb adaptor for very little expense. I think mine cost around 20 euros. Paul DJ0CU

Hi Linas, Welcome to the Challenge. Join the Discord Website as mentioned by Luc. You will get Info there about some QCX QRG or post yours and someone will certainly find you CU next time. Martin

Agreed. Just look at what 1960-era Heathkit tube transceivers sell for. I’m looking at several on eBay in the $450 range. Even the “parts only” ones are around $150. But for the collector’s

Why go to all that trouble Run a mains cable down to shed, (if need be in a bit of plastic conduit clipped to fence), then no need for battery and control the QDX via a raspberry pi using VNC and

I covered this in a recent presentation on Portable Operating - tiny.cc/portop. I have used this with my KX2 successfully.

Yes, that would be a great idea, but many hams are collectors who get very emotionally attached to their stuff, which keeps resale value absurdly high, keeping such equipment out of reach of

How about a Raspberry Pi/Power over Ethernet ("PoE") solution? That would be the Cat's Meow... One of my future projects is a multi-channel Ethernet connected GUI for QCXs, so I can run my growing

Peter, You’ve hit on a brilliant idea, one that could be expanded still further. Technically, anything that could be handled over an Ethernet cable could probably be handled over the Internet or

I don't think the draft manual is quite clear enough on this.? It is important that the START and FINISH of the windings are identified as well as just continuity.? It would be possible to mix up

While lying in bed recently, my mind pondered on the QDX and it suddenly struck me that it has no manual controls at all: it is totally controlled by software. This would make it ideal for remote

Hi Fred More likely, you should have it by Monday. Trust in USPS! I expect you will let us know on Monday :-) 73 Hans G0UPL http://qrp-labs.com

As soon as i switched to the asset tracker sketch that does not need a gps fix to start i got instant connection to helium. here is the cayenne dash board. The pico tracker sketch worked? the first

Hee Hee...can you imagine wrapping? in such a way that one wire gets wrapped around the the other or others in such a manner, at the end of say 10 inches it is close to an inch longer than the other

Yeah, I’m still sorry I didn’t pick up several of those fire-alarm batteries at my local ReStore when they were only $1 each, they’d be perfect for the QCX I have on order. Recycling is to raw

I received my shipping notice email (from US stock) for order 50001 this morning. So in a week or so I should get the QDX. Maybe I will be able to build over Thanksgiving... We will see. Fred W0FMS/7