SoftRock RXTX ensemble för 6m/4m/2m

Skriven av SM2DCU
Detaljer
Publicerad 04 juni 2012
softrock-rxtx-ensembleSoftRock RXTX Ensemble i HF utförande

Många amatörer har säkert med stort intresse följt Tilmans SM0JZT intressanta artiklar om SDR i QTC. Där är Tony Parks KB9YIG olika SoftRock konstruktioner kanske de mest kända. Tony verkar nu ha tankar på att ta fram en ny transceiver i Ensemble-serien. Den stora nyheten är att den är tänkt för 6m/4m/2m. Den intresserade VHF amatören kan följa utvecklingen via Softrock40 gruppen på Yahoo. Här följer Tonys egna första inlägg om Ensemble för VHF.

6m/4m/2m RXTX Ensemble transceiver

Posted by: "Tony Parks"

Sun Jun 3, 2012 5:14 am (PDT)

Good Morning All,

A number of people have ask when is a 6m/4m/2m RXTX Ensemble transceiver kit going to be available? I too have been thinking about such a kit.

My thought is that the RF output would be generated at an IF frequency and then up-converted to the VHF band of choice. Amplification and LP filtering would then be done at the VHF band to produce about one watt output power. An attempt would be made to fit the circuits on the same size circuit board as the RXTX Ensemble.

All of the SoftRock kits are based on good input from others so I am again open to suggestions from the group. I would be most interested in your comments!

Thanks and 73,
Tony KB9YIG

Re: 6m/4m/2m RXTX Ensemble transceiver

Posted by: "Tony Parks"

Sun Jun 3, 2012 10:47 am (PDT)

Hello All,

The thought would be to use the Si570 output for generation of the quadrature clock signals as well as for up/down conversion clock.

For 144 MHz operation the Si570 output frequency, f, would be set such that f+f/4 = 144. This would give f= 115.2 MHz. The RX and TX IF frequencies would then be f/4= 28.8 MHz.

For 50 MHz operation f+f/4 = 50 would give f= 40 MHz and an IF frequency of 10 MHz.

To keep the kit price as low as possible I do favor a single circuit board approach.

Thanks and 73,
Tony Parks
http://www.kb9yig.com

Go to top