It's actually pretty simple, and well spelled out in this document: https://www.qrp-labs.com/images/qcx/HowToUpdateTheFirmwareOnTheQCXusingAnArduinoUNOandAVRDUDESS.pdf I'm not sure how I found

You probably didn’t hurt it with a string of cw. That’s much easier on it than a solid key down. Easiest way to check it is to go ahead and transmit (with amp on) and see if it’s still making

On Mon, Nov 2, 2020 at 04:10 PM, Michael Greene wrote: I wonder if I should disconnect the ground shield from the QLG1 end of the cable for the QCX+ as well?I'd say no. Maybe on a very long run

OK on Low Fuse changed to D7. I found the original post - message #40742, 12/03/19. in it Hans stated: "Note that from now on we will supply QCX chips with low fuse 0xD7 not 0xF7. The new

Art well here is something you can try. put a dummy load on your QCX and let it transmit WSPR. now simultaneously set up another rig to receive WSPR using an antenna. I am suspicious you should see

Hi Hans, Will you also have an updated firmware file for the DDS SigGen? It also parses and displays the same GPS data as the clock... Tnx km6wt

But will it damage the QCX? I accidentally sent a 30 second string of code without the 50W switched on. Did I damage the QCX?

Thanks for the replies. Yes, I see that the bypass diodes are running at lower current - missed an extra resistor in the path! And I had forgotten that the input and output switches would also need

Two other inputs on this, that may have zero bearing, but just because I'm curious. 1. In the manual for the QCX+ shows the paddle/GPS connections on the 3.5mm input as DIT on the ring and DAH on the

On Wed, Oct 28, 2020 at 09:29 PM, David R. Hassall WA5DJJ wrote: I also changed the two 10K resistors R1 and R2 with a pair of 1% 10K resistors. That brought the voltage up to 1.98VDC but not to

Hello Michael and thanks for your troubleshooting info. Han's recommendation on cutting the traces and swapping PTT to the ring and +5V to the tip is a good one. I haven't looked at the PTT circuit,

Mont, I have several Arduinos available. I was reading the posts on the "Updating QCX+ firmware using Arduino Uno" topic over the weekend, as well as looking around online to see what others are

On Mon, Nov 2, 2020 at 07:20 AM, Michael Greene wrote: I am still on version 1.05, as I don't have a programmer.Do you have an Arduino? I've been using my Arduino UNO as an ISP programmer lately.

The biases on C43 through C46 should all be very close to each other since that is where the I and Q pulses are integrated/filtered and all the filter circuits are identical. So compare all 4 of the

Since the Local Sidereal Time works perfect from release c1.03b, anything new or changed on that front in the latest?

Hi all No significant issues were found with 1.06. Today we started programming and shipping 1.06 chips. The shortened splash screen message is just an oversight of mine. I uploaded a new 1.06 file

BTW, when I started having the issue and began reading the manual carefully, I noticed the 2 1K resistors in line with the 1PPS and Data signals in place when the GPS is directly connected to the JP1

Hi Peter Yes, Ron is correct, it doesn't work... the amp switching circuits just weren't designed to work this way to pass 5W power back through the receive bypass path. There are two reasons.

Hans, Very nice suggestion! That should also eliminate that issue. Thank you, Michael KN6IZE

Al, Thanks for all the testing. The tip causing the short as it passes the ring contact makes sense. I like the idea of coating the tip, as this is the only purpose I plan for the cable. Of course,