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Trystan No, SDRs are direct conversion. Many do not avoid this situation although it is suppressed to varying degrees. The exact centre is best avoided in many SDRs Note that the actual local

Technically, the fuse in the plug is required to protect the *cable* between the plug and the appliance. Protecting the appliance itself is another matter. 73, Stay Safe, Robin, G8DQX (about to brew

I am now running on Lora Asset Tracker .ino firmware. Can i go airborne with this. I could not find the line you suggested changing in the pico tracker .ino file The asset tracker works well but just

My QDX is confirmed, after a couple of overloads on the order page. Even got a TNT email saying it was on the way and then another saying it was delivered to Germany. Apparently TNT re-use their

Would a panadaptor be pretty useless with a direct conversion receiver though, because you'd see a whacking great big signal at the frequency of the QCX?

"Volts jolts, mills kills." In a domestic home, here in Blighty, you would only encounter one type of plug and socket. The 13 Amp type. Its fed by a 30 Amp ring main. Also in every domestic home here

I presume that everybody knows this already - or not? Never fill up vias with solder! For RF to travel from one layer to the other it needs to travel via the surface. Filling vias with solder moves

My Thanks to you Hans and the others who helped me understand what those dots and mini holes are for. A well designed kit and fun to build and more fun to use. Thanks again. Dave K8WPE David J.

Hi all, For portable QRP operation I am planning to use a small semi-automatic antenna tuner at the feedpoint* of my vertical. Manual tuning takes some time - set carrier, walk over to the antenna and

My new lab is ready for the QDX - :-) 73 - Knut

I received an email from QRP Labs on 26/10 that my? order *49973* was shipped - and an email from TNT that they had my order and had the status of "collecting" The order is still in "Collecting"

Hi Ryan The Si5351A 90-degree quadrature mode will only work down to 2.93 MHz. That is therefore the lower limit. If the QDX receives a CAT command to operate outside the range 3.4 to 14.5 MHz, its

The breaker in the consumer unit protects the wiring to the household sockets, the fuse in the plug protects the item being powered. If the wiring was overloaded by a ring main for example there could

Ken, there are some parameters in menu 5 that you can adjust (see Firmware manual http://qrp-labs.com/images/qcxp/firmware/1.07/OpMan107.pdf ), but my decoder works fine with the default settings. Try

Oh, I like the landscaping circuit option for outbuilding, small loads...For small IT loads, you could also consider PoE , particularly if we're taking a RaspPi node (with PoE hat)...Wayde Nie

Hi Dave Yes, they are vias. QRP Labs kits use 2 layer boards. The vias are necessary to connect the bottom and top layers of a signal trace as it is routed around the board and sometimes it has to

in the niche market of point to point microwave transport, filters are hand tuned as each filter has different band pass/band reject characteristics depending upon the type of radio being produced.

HF is particularly difficult because it covers many octaves. And in many cases can only be done by hand. Many physically big part filters need to be used to cover 2-30 MHz because filters work by

First Japan, and then China, crushed the US ham equipment makers. The speed with which old-line companies like Hallicrafters, National, E F Johnson, Clegg, etc crashed in the late 1960/early 1970s was

This question occurred to me because I've been watching the Antique Wireless, History of Radio series on YouTube. Fascinating...but the Ham Radio industry is littered with failed companies. My beloved