The kit, therefore, is not compatible with the Mobo series of add-ons, since they depend upon the plug and socket arrangements of the RXTX V6. These will cause the “completed” pictures at the end of each stage to be slightly different, due to the layout changes between that version and the currently documented production version. In summary, the hardware provides the signal, leaving the computer software to do the heavy lifting. Tuning is straight-forward and the visuals are amazing. Until I figure that out, my days of transmitting are off in the not so distant future. The unit will transmit.

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The PC’s sound card performs a conversion of the two analog signals “I and Q” to a digital representation, which is then operated upon by modules of the SDR program to perform the many “radio” functions, such as demodulation, filtering, AGC, etc.

You can always use Rocky to generate I and Q signals for tests requiring these audio signals this is the author’s preferred way. That includes both tuning and processing of received signals. This is the wrap-up stage, where we connect the rig to ensemle outside world PC SDR program and soundcardantenna, and paddles and actually put the transceiver through it paces.

The Ensemble is a software defined radio. Each stage will have a “Testing” Section, outlining one or more tests that, when successfully completed, provide you with the confidence and assurance that you are heading in the right direction towards a fully tested and built transceiver.

The sampling rate, quality and specs of the soundcard will determine whether and how well the PC can work signals whose frequency is either sode of the center frequency.


HDSDR displaying 80 meters. The other issue is, when setting things up, I tried so many different combinations of ensemgle and that, I can’t remember what I did to get the thing working. Inductance of the single winding usually the primary is 1. I understand there are a lot of variables in these setups including various sound cards and ensemblle the way the boards are built.

Using approximately 6 inches of 30 wire, wind 3 turnsbifilar, on a BN ferrite. For the non-expert builders among us, this site takes you through a stage-by-stage build of the kit. Well worth the short viewing:.

SoftRock RXTX Ensemble Transceiver Kit

It is preferable to have an ESD-safe station, with a grounded tip. Inductance of the single winding usually the primary is 0. This video provides some excellent hints at soldering and de-soldering SMT components: In the case of an 80m 3.

That rstx be one reason for a general lack of documentation. Power for the programmable local oscillator is provided by converting the USB bus power down to 3.

WB5RVZ – Home Page

The sampling rate of the sound card is directly proportional to the cost of the sound rxyx – the higher the rate, the higher the cost.

Building the kit This was the most complex solder project I’ve taken on and I have the errors to show for it. However, I think I’m close. Ensembpe Identification After soldering problems, the most common cause of trouble in kit building is the installation of the incorrect component.

Ensemble RXTX Builders’ Notes

If you are not experienced at soldering and even if you are somewhat experienced at solderingrefer to excellent tutorial on basic soldering techniques by Tom Hammond N0SS SK. That makes writing documentation difficult and I wish Ensemlbe had taken notes along the way for the benefit of others.


The function of the local oscillator is to produce a endemble whose frequency is four times the desired “center frequency” of the radio.

The software really is easy to navigate. The kit is offered with all of the parts necessary to build it for any one of the five possible versions.

Building the Softrock Ensemble RXTX

If the builder has access to a dual ensfmble oscilloscope, along with an audio signal generator and an RF signal generator, and feels the need to perform tests beyond the basic DMM tests, certain stages will include in their testing section some optional tests involving this advanced equipment.

I don’t have the knowledge to know if it’s hardware related or software related. I had high expectations for this little board and it delivers fairly well. I’ve posted to the Softrock group and read all there is to read, but I’m pretty well stuck at enseble point. Could this simply be due to enemble fact that my reciever is so close in proximity to my transmitter?

If you are not certain of which band option you wish to build, check out the discussion in this thread on the Yahoo Softrock40 reflector.