I have just realised that by replacing the earpiece with my PC soundcard I can use several SDR packages to allow me to look either side of the QRP calling frequency. This rather defeats the simplicity though!
27 Oct 2011
XBM10-2 Micro-transceiver boxed
I have just realised that by replacing the earpiece with my PC soundcard I can use several SDR packages to allow me to look either side of the QRP calling frequency. This rather defeats the simplicity though!
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5 comments:
I guess you could probably add a soundcard chip and make it into a USB dongle controlled direct from HRD or Multipsk. Would be a saleable proposition for simplicity at another level.
Hi Roger - does the transistor give more gain than a passive mixer on rx??
Tony
Tony - yes the oscillator mixer stage has gain. In fact I'm not quite sure if you should class this stage as a direct conversion or regenerative detector.
Roger - Great that youve worked local and some dx on it.
Did you rely on the antenna to filter the signal or did you use some kind of filter inline.
Hope you can get across the pond with it.
Tony
and what about feeding it some WSPR
To stay in touch with the project, you could build it into a netbook, and use sma for the antenna out, the very thin coax does coher with the whole idea itself. Thus builing the ultimate small and QRP WSPR/JT65/PSK one box solution ever.
grin, pitty PCMCIA is never used in a netbook, otherwise you would have interchangeble units.
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