There is a lot of audio gain. There are also the SCL and SDA control lines to the Si5351. Not so easy to isolate those. 73 Alan G4ZFQ

This is all very interesting but I would like to return topic to the original stream. Probably it would be better created separated thread for such discussion for avoiding mess. My yesterday

Chris, Read these Abt building QCX and tuning LPF before doing the rest https://on7dq.blogspot.com/2020/12/some-notes-on-qcx-mini.html And for NanoVna, study my

I am one of those who will repair at cost of parts and shipping. -- Julian, N4JO.

On Wed, Jun 23, 2021 at 02:09 PM, Timothy Freeze wrote: I just received a complete 80 M kit, built the display, and put the header pin in upside down. I'm so dumb. I had to remove the 10 pin header

Thank you for wishing me well. I was not too worried about it because thunderstorms are rare hear, but just my luck one hit today. KQ6UP On 6/23/21 8:31 PM, VK5EEE wrote:

The formula for a PP amp whether CT type or phasing transformer type is Z drain to drain = 2 * ( Vcc- Vmin) squared / Power out. all in consistent units. Vmin is sometimes taken to be 2

I'm not able to help, but I'm wondering if the solution to a mystery here is the thunderstorm? In my case, the TX was already not working, but the RX was fine. That afternoon, there was a thunderstorm

Did you try swapping out the IC2 for one where the display is good? I did that and the display worked again as it also got the row of blocks on the top, but, the RX has also gone. Both RX and display

I am so bummed, I have only had my kit going for about a week and it seems to have died. I had it going in WSPR mode while off to the store, and I noticed a T-storm. The last WSPR post was about the

I always love 0xdeafbeef on my 0xfocaccia :). - Jerry ( sorry, couldn't resist )

Or if you like the Italian bread, which I occasionally bake myself, 0xF0CACC1A :) I will stop contributing to this thread now since it is impairing the signal-to-noise ratio of this mail

Yup, I know the C320C31 - used them at GE back in 2008: as you say, quite fast, and cheap. And yes, 2^n byte length circular buffers: one of the most essentially elegant constructs in the whole of

0xABADBABE! Den 2021-06-24 kl. 00:06, skrev jerry@...:

0xdeadbeef! - Jerry

Mitchel, I tried to operate my 50 watt PA on WSPR mode at full power. Both IRF510's failed. Hans reminded me that this amp is designed for CW with around 50% duty cycle. It is not designed to operate

Yes, that's true in the 16-bit world. 73 + 88 = FB is true in the world of hex :) jerry@... wrote:

Generally Ohms law is the rule. Add RF to that and its true but the numbers are now real and imaginary. Generally back of the envelope numbers set the ballpark and from there it is dealing with

Hi Mont, I have a cheap logic analyzer I bought on a whim. No idea how to use it! 🙂 I just received a complete 80 M kit, built the display, and put the header pin in upside down. I'm so dumb. I

Sharc? Whazzat? IIRC the DSP we were using was a TMS320C31. We didn't use any of the DSP features, it was just a good cheap CPU. They sent me to a 1-week seminar to learn about it. In the class