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Hi Seth The footprint isn't square. You can only comfortably fit the button onto the PCB in the correct orientation. 73 Hans G0UPL http://qrp-labs.com

Hi Seth, Solution 1 Solution 2 - check with a multi-meter. 73,Dave, G8XUL

Go here to figure your toroid wire length. 72 George/W2BPI ? http://kitsandparts.com/toroids.php

I am not familiar with protocol for these micro switches used in basically all the QRP Labs kits, I have to assume them being 4 pin that there is a right and wrong way of installing them? Anyone

I built a 40m QCX and my notes from the build were you'll be winding 53 turns essentially and that calculates to 2.56 feet or ~30 inches. I allowed 7 inches for each loop (3.5" out and 3.5" in) and 2

Hi Tim. I changed the capacitor from 10n to 100n and I get somewhere between 250 and 300mW on 630m with a 5V supply and a single FET In reality you will probably need an amplifier as 250mW into an

Hi Keith, I've just measured the piece of wire from my kit (I'm a few transistors away from winding the toroids) and it is 208cm long. As this is enough for L4 as well it should be plenty for T1. 73

Beautiful Job Mick! I did a little research on PagePlus at the Serif webpage...it appears that PagePlus will output a standard .pdf file as well as the proprietary .ppp format. I wonder if I could

Keith Fundamentally the thicker wire may be easier to handle but the actual gauge will have no discernable difference. http://www.dl0hst.de/mini-ringkern-rechner.htm is a calculator, useful for all

I’ve just made a couple of attempts to wind T1 for 40m using the supplied wire and I’ve come to the conclusion that it needs to be wound in the ‘messy’ style as described for 60m and 80m to be

Thank you Hans! 73 Jose F4WAR-KB2YEO

Hello Jose All LPFs are in stock. The only thing we are currently waiting for is the 6'th/7th batches (1000 kits) of kits, which are currently in transit from the kit packers to the kit shippers. As

Hi, just wondering if the QCX 40m shipping delay is due to long backlist or if it is still waiting for out of stock parts before shipping?? Thanks 73 Jose F4WAR-KB2YEO

Hi Group! I am happy to report on another QCX (#2332) up and running, mine is for the 20 m band and hence didn’t have the chance to test it on the air yet as by the time I arrive home in the evening

WOW!!! Very, very well done. This is what the QCX needs to make it "well rounded" AWESOME!!! 73 de Eddie ZS6BNE

I had fun building my QCX 40. It worked first time really but I was unsure of a few things and tried to make things better. Would I build another? The answer is a certain yes but I would do it

Hello, ? ? I finished my kit for 30 meters recently.? It took me five days building after work to complete.? Even not having built a radio before, I did not encounter any issues with the build.?

For what it's worth I get 260 milliwatts out of my completely "stock" U3S on 630m running 5V to a single BS170. I used the 25 turn winding for T1, not the bifilar

Hi all A reminder: the QCX output stage can drive earphones with 32-ohm impedance such as commonly used on mobile phone (cellphone) headsets. If you connect low impedance e.g. 8-ohm headphones, then

Glen, Have you checked the voltages in that area near the filter and PA? My alignment meters were all but steady before developing the motorboating. Now the meters bounce about 1/4 the bottom line