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The KX3 is a direct conversion transmitter. It has a single oscillator at the tx frequency. It will have no spurs, only the harmonics, and the push-pull power chain can null the 2nd order harmonics

Thanks very much, Bob!? ?Those look like they generally agree with what I found (after correcting for the problems with D20/D21).? ?You and I also see some increase in the noise spectrum around

Bob, Thanks for the thorough comparisions. Very often, we are at the limits of measurements with these instruments. A professional Rigol 815 is my priced possession though I often get by with just the

I uploaded to the files section a pdf on what I have been seeing while measuring the spectrum output of my sBITX V2. Nothing I have is officially calibrated and I am not an RF engineer, so take it

The following files and folders have been uploaded to the Files area of the [email protected] group. * /KD8CGH spectrum/measuringSpectra.pdf (

Hajo, Which radio do you have? Can you see the yellow modulation as you speak? What is the drive settings. - f

Problems with my sBitx Swv 2 and 3! Everything OK in Swv 1! Reception is OK! Transmission is without modulation. PTT switches, TX output = 0 Any idea? Please help vy73 Hajo DL8DH

A classic mistake for a first radio is to go qrp. Instead, a used 100 watt HF radio from Yaesu or Icom would be best. People will come back to your calls, even a suboptimal antenna will do. - f

Go! [email protected]> wrote:

I have other radios. In the shack I have a Yaesu 450D and VHF Kenwood . Also one in my vehicle. I'm just looking for a project to build and then use out in the field. A learning thing.

This is not a starter radio. It will make you think far less of the hobby. This is a constant work in process, fun to many, but be aware you will spend more on support and upgrade crap than the

I have been looking for a small HF radio to go portable with. After doing much searching I found these kits and decided this was my start. I have many questions about the thing and I'm researching all

b option. We already do this, I'm just working on cleaning up the code and may be make it useful to others. This is the backend API and UI we use in our

Installed and build on a v2 sbitx. Sometimes the rx does not start. Also sound quits randomly. When this happens the speaker icom shows like is muted. When is receiving correctly, everything works

Evan, for the pitch control controls the audio tone of the cw sent and also received (the bandwidth control centers the cw bandwidth around it). To control the sidetone, you have to use the SIDETONE

Ashhar, Playing with the controls on my sbitx DE, I did not hear any change of the sidetone with the pitch control on CW. SSB receive is working GREAT!? Good clean signals, and all controls are

I'm still curious but I'm not sure I understand, do you want to: * use sbitx's user interface code to control a different radio * use a different UI to control sbitx's radio * both (a) and (b)

It is supposed to save the log entry. You should have the call, sent and recv fields filled for it to work. - f

Suggest you read the article I wrote on page 13, and pay attention to the high output microphone element that I

When I click LOG>> on the native interface, it does nothing. -- Gyula HA3HZ