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!

Makes perfect sense. I’ll look at it tonight and inspect the area. Thank you, Wes. I’ll update soon...

On Sat, Jun 6, 2020 at 12:33 PM, ian liston-smith wrote: But it would be interesting to know how many people use the split dual VFOs, memories, keyer decoder, clock, beacon, etc. on a QRP rig.Ian I'll

Thanks Alan. I've removed the finals and I'm getting a nice almost 5v p-p on IC3 pin 3 now so I seem to have avoided more damage. I'll replace Q6 too. Ross

I have 2x QCX 14MHz and 7MHz. QCX 7MHz I mounted SMD resistors and capacitors. And I have to say that the receiver on the QCX 7MHz works better.

Thank you Hans! My QCX80 (old school, not a QCX+ announced days after I ordered) shipped 29-April. It will be my third! I was in no hurry, so I chose the slow-poke cheapskate shipping. It still hasn't

The idea of a mini (or micro) QCX really excites me. For sometime I have been looking at the options for a tough tiny mono band CW transceiver which I could sneak in my holiday backpack. I know there

One first comment , some of us call the general trend here creeping featurism. When you do this you start adding features that are only that. They add no critical function nor make it lower in