Darren, Just for grins, set up for WSPR and see what you get for spots at http://wspr.aprsinfo.com/. How much power are you using now? Mike WM4B

Question from a newcomer. With the 40m qcx, would it be helpful to add on a PA to this kit? I have an average ant up about 30+- feet in the sky. I receive pretty well in the evenings but I don't

That's why they're called the US Snail. -=-=-=-=-=-=-=-=- 73, Gwen, NG3P

If a Post Office is involved in a delivery, the time multiplies. I have had orders from Tayda (in Thailand) via DHL take 3 calendar days. For your new QRPLabs toys, use FedEx and spend the extra

Happy Saturday. Our clock, audio amo, and speaker are now operating great. We can play the chimes based on an alarm setting. However, we are experiencing a steady humming in the speaker when power

Ah, well now, you may have mistaken me for someone with some authority or control... Far from it ;-) Sorry, that would be now be a question for Hans :-) -- Julian, N4JO.

Julian, the highest order number on that list is 35614. My order number is 36290. Is there an updated list. Thanks....Jim...KQ3S

Is this to be a clock or a radio? Part two if in the field do you carry a GPS or digital smart phone? Do you need redundant time? I'm trying to understand why this is a critical

1800hz, no idea where you get that. See the plots on the stor page http://qrp-labs.com/polyphase.html It mentions to 1800 hz for things like WSPR and other digital modes but the board does as

Thanks for that Alison. The bandwith of the board (as supplied) tops at 1800Hz, Hans suggests that ssb should be okay but am I wrong in thinking 2400 would sound much different? I would be using both

Hi. I have ultimate U3, plate "Rev 2". I want to put an external applicator to increase the output power First I'm going to do the transformation to go from U3 to U3S.

Atmel and Microchip is one and the same also the largest MPU maker and has several dozen architectures. PIC16.18.24,32 MIPS, ARM 8051 family based and likely a few forgotten. Arduino is not a MPU,

That and on the east coast much of the in coming goes though customs and I've seen three weeks calendar time but a full 9 days of it was in customs. Then again I also remember an order (NOT QRPL)

Have to ask. How much bandwidth do you need? Nearly 3000hz is wider than most filters used in SSB transmitters. Most of mine are 2.1 and 2.4Khz and 2.8khz is considered wide. Also despite your RX

Business Days are basically M - F so count the days and subtract weekends and bank/legal holidays. add up to a week for Covid slowdown. Don WB9STS

Jim, that sure does happen. Personally I would make a first step to see what signal is present along the IC1-6 to IC3C trace. If the Tune signal shows up when touching a probe to points along this

Has anyone changed resistor values on this board to increase the bandwidth for better ssb recovery?

Hi, Mark I would start by taking a fine solder pencil tip and reflowing the connections on IC1. It wouldn't be the first time I saw a leg on an SMD chip hanging a couple of thou above

Jack, and others Some time ago I played with several versions of RTC modules from Ebay sources. These use various clock chips (get and review the datasheet) with slightly different functions. Some

Well done Mike!