I'm not going to be much help since I'm in the dummy club but what do you get with a constant key down? I assume the power is fluctuating or is that some kind of spurious spike or noise? Sometimes I'l

Thanks Alan.

I continue to be somewhat puzzled about frequency accuracy compared to drift as reported by WSPR receiving stations. Here's an example from a recent 30 meter report: 2019-02-21 23:40 WB5THT 10.140248

Ah-so. This has been a point of confusion for me with the Q3S and how the GPS interacts for frequency management. Just a few days ago I built another Q3S since I was having a stability issue with my f

Very nice!

The Premium plan for 10 Gb of storage is US $110 a year - why not move to the Premium plan and ask for donations? I'll be glad to kick in $20 and I'm sure others would throw in a few quid as well.

My guess (and it's a good guess) is the poor response time is due to a lack of server resources. Same thing happened to a forum I used all of the time, the owner wasn't able to generate enough donatio

For what it's worth... I haven't built a QCX but I do have a sort of running Q3S (I think it developed an issue), anyway I used my Siglent spectrum analyzer and tracking generator to check the low pas

Like you I built a bunch of Heathkits many years ago (including their color TV) and immensely enjoyed the experience. I completed a Q3S a month ago and have another one in the shack to build. The inst

I bought a few of the tiny Chinese buck converters based on the MP2315GJ switcher IC and when I looked at the output with the scope it was ugly. Lots of ringing. Some of them could be okay based on ho

No special precautions needed building the kit. Our house has a metal roof and my QLG1 works great placed on a south facing window sill. Whatever birds it receives it gets a fix really quickly.

Wow, I think I have both of them Hans! Now I need to come up with a project to use the 10 Mhz crystal. I wouldn't mind sending them back but I suspect postage would be prohibitive.

#synth #ocxo #si5351a

I think one of the other kits in my Q3S Ultimate package also had a 10 Mhz crystal. A bonus!

#synth #ocxo #si5351a

I just finished a second OCXO kit and I freaked out when I found several leftover 151 caps (.15pf). When I looked at the parts list it didn't include these caps so they will go in my parts bin. Also t

#synth #ocxo #si5351a

Best wishes to Hans and the QRP community. I'm having kit withdrawal - I just built my last QRP Labs board but I have another Q3S on order.

I'm still pretty new with the Q3S but I have mine running and getting reports so maybe I can help a little. Did you set the bias? How many milliamps is your Q3S drawing? What are you using for a power

Thanks Andy!

At the risk of sounding like a complete idiot, I'm going to ask anyway. The LPF board and the Q3S board nicely notates "IN" and "OUT". I wasn't sure if the LPF "IN" should connect to the Q3S "OUT" or

Sorry Alan, I was remiss in not replying to your question. I'm using a Powerwerx switching PS (13.8V) which I use for my Elecraft K3s and a homebrew stepdown LM7805 for 5V on its own board in the Q3S

Thanks Alan. I have watched the calibration cycle after transmission but I think my issue is I don't know what to expect from the Q3s in terms of frequency stability. My Q3s might be operating nominal