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Tim/David, My U3S puts out around 4 watts with the PA Kit measured with a DSO into a 50 ohm dummy load. I did not know about the wsprnet convention of using EIRP. Thanks for sharing! I have an 18

Thanks Mick! Just what I had in mind...and BTW it printed at actual size just fine on my first test print. As an aside, I laid it over the top of a QRP-Labs blank case that I have on-hand., and it

Curt, I have had a good time working on this stuff. It’s really great therapy! I look forward to the vfo / sig gen project! That will be very useful in the shack. Hans truly has some great

I finally found some time to play radio today and so tried the U3s that I built recently. I have it built with a 25 turn inductor, three BS170's fed with 9v for the PA, no heatsinks, with 200mw output

Antonio nice work - thanks for sharing pictures!? actually you may be getting more output power than most of -- 3 watts tends to be normal (per manual) at 13.8 volts.? Beware - go it practice

Seth yes those snap-in switches!? note the connections are to hold the part on the board (long enough to solder) as well as electrical connection.? it's a feature - a rare part that won't fall off

Thanks Paul. That information is exactly what I was looking for. 73 Tim KB2MFS

Thanks David. I actually sent you an email last night regarding your 472 kHz amp kit/board. I will most likely put up a Marconi type antenna for this band. My wife already comments about the number

Thanks Hans. I had read that mod information but it seemed to only show the power out after the mod. I wanted to make sure I didn't have an issue with the lpf possibly before doing the mod. Great

Oops, that should read 28 gauge and not 30 gauge wire supplied in the QRP Labs kits. Sorry!

Thanks guys, I am finally building up several items I’ve ordered this last year. Didn’t realize it wasn’t square. I built a Progrock and QLG-1 last night. Hope to get the clock done today,

Hello Tom, Eddie Many thanks for the nice comments - very much appreciated. Tom - PDF attached.? Please bear in mind various printers do not always print exactly the same dimensions. WYSIWYG doesn't

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