SDC Skimmer for Flex Radios

Piero Ferrua

Ho provato ad installare nuovamente la versione 17.1401 e con TCP 4992 UDP 4994 (presa eletterica non collegata) tutto funziona a meraviglia,,,,

Piero Ferrua

Grazie mille Erik per il tuo supporto, ho provato a fare i controlli che mi hai suggerito ma vi risulta difficile interpretare e capire .
Siccome con la versione 17.140 funziona ed io uso SDC solo come skimmer x vedere dove diene dato il 73 penso di non aggiornare il programma.
Grazie ancora dell' aiuto fornito, cordiali 73

Piero IZ1XEE

Erik Carling EI4KF

SDC major new version announcement from SDC author, Yuri UT4LW.

UT4LW Yuri Pavlov

Version 18.01 has been published. Please study this message carefully.

The major and big change in the program is the SDC-Contest-SDC Audio system. 

The reasons why I implemented SDC-Contest-Audio subsystem in SDC. Initially, the subsystem was developed at the request of contesters who use several transceivers in SO2R...SOxR modes to combine the sound of several transceivers into one headphones. Additionally, during the development process, I was able to solve several problems related to incorrect operation of the Flex+SmartSDR system. The new system improves operator performance when using a single transceiver.

Reasons, and solutions:

1. Combine the sound and control the sound of multiple transceivers. No need to connect headphones, microphone, CW dongle and pedal to each transceiver. All these devices are connected to the computer. The standard sound card of your computer/laptop can be used. The microphone monitor, DIGI, and CW-Sidetone will operate remotely.

2. Telegraph key. Large number of settings. Full QSK. High-quality operation of the double-weighted key, there are correctors of operator errors. When using WDM-KS driver, ASIO delay is absent.

3. Transmission of CW macros. In remote mode, the self-monitoring works. The BreakIn pause is not added when the text macro transfer is complete. Added special characters: ~ - shortened pause between words, + - pass two letters together, e.g. A+R, B+K,...

4. One microphone for all transceivers. The microphone has a separate monitor level control. The microphone monitor can be turned off and the audio file transfer monitor will continue to operate. VOX. CW-Key can be used as a Footswitch. But you can connect the footswitch to the optional USB-COM adapter.

5.In SmartSDR, the monitor balance (L/R) does not work in SSB and DIGI mode. This problem is solved in SDC.

6. Having gained full control over the sound streams I solved several issues related to the incorrect operation of the AGC system in SmartSDR. Loud stations in CW (more than 9+10) sound with distortions, the sound is accompanied by artifacts and "cellophane". The operator may be concussed during the contest :-))). The AGC type is binded to the band, not to the type of modulation - this is a strange behavior of SmartSDR. SDC-Audio offers an alternative AGC system that does not have these disadvantages. Basic AGC parameter settings are available in SDC-Audio.

7. Automatic DAX channel control. For some reason unknown to me, in SmartSDR the DAX channel is bound to a band instead of a slice, which often leads to confusion. SDC-Audio monitors DAX channel binding to slice and automatically corrects problems.

8. QSO Audio Recording. In SmartSDR it is impossible to make an audio recording of a QSO due to the fact that this program does not have an audio output that contains monitor/CW-Sidetone. SDC-Audio solves this problem, the audio files will contain monitor/CW-Sidetone for all types of modulation. Several methods have been developed. Each QSO - independent recording of files for each New QSO window. Continuously - independent continuous recording for each New QSO window. Continuously Stereo - record audio files in stereo mode: New QSO 1 - left channel, New QSO 2 - right channel.

Disadvantages of the SDC-Audio system: A USB-COM-Key adapter is required for telegraphic key operation. However, it comes at a cost.

If you do not turn on the SDC Audio button, the system continues to operate as normal. The new version has been tested by several users.

SDC-Audio is described in more detail in the SDC-Contest-Audio-SDC Audio manual.


You will need a new registration to install the new version. This is due to many reasons, including the fact that there have been several cases of unauthorized transfer of keys to third parties. I am sure you understand the transfer of registration keys we are talking about. Please do not do this.

The program is free, everyone who wants to use it will receive new keys. Please do not forget that development of such complex programs as SDC is time-consuming and expensive. Therefore, voluntary donations are welcome :).

Version 17.xx will be maintained through the end of May 2025.

Sergey KN7K

Thanks Erik and Yuri!

Please specify how to request a new registration key? Just send email to Yuri?

I do not see an option in SDC to request it.

Thanks,

Sergey, KN7K

Erik Carling EI4KF

Hello Yuri

Yes, please email Yuri with your callsign. He will respond accordingly.

73 de Erik

Erik Carling EI4KF

Sorry, I meant Hello Sergey. My apologies. Bad case of senility…..

Erik