Postage only for both of mine. Ted, KN1CBR
>------------------------------ > >Message: 25 >Date: Wed, 24 Jun 2015 22:18:41 -0400 >From: "inventor61 ." <[email protected]> >To: [email protected] >Subject: [Elecraft] [K3] ideas for re-purposing our old K3 > synthesizers >Message-ID: > <CAHmQzT=3YUhFM=aQySg-DvUP_23ueUSOb9cTtwyKGPi=xdq...@mail.gmail.com> >Content-Type: text/plain; charset=UTF-8 > >I printed out the schematic of the original K3 synthesizer module. The >diagram says 'rev. A4' and is dated 8 Jan 2010. Hope that's close to the >as-built! (probably is) > >This gizmo appears to have an output range from 8.7 to 46 MHz. I don't >know how much sauce it can develop but I have to imagine +10 dBm or so >into >50 ohms, I bet it's flat across that range, and it looks like the thing >would be whistle-clean. > >To get that, it needs a tight 49.38 MHz reference oscillator (I found a >0.5PPM TCXO for ~$30 from mainland China), and several common DC supply >voltages. > >It also needs a small microcontroller or other way of providing the >correct >serial peripheral interface command lines and interaction. That processor >would also control the output frequency, perhaps with an encoder, or >whatever human interface might make sense. > >But first, I am trying to see if developing a 'host' PCB would even be >fiscally wise to design and construct. I mean, who needs a 8.7 to 46 MHz >VFO? > >And, how mad would Eric or Wayne be with me about the ... um ... >semi-inverse engineering research ... I'd have to do to make this thing >operate? > >On the other hand, I wager there's a thousand-plus of these modules >sitting >around the planet looking for something to do. The capitalist in me is >intrigued. > >So, a bit of market investigation here: > >a) what would you do with such a device if you had one? bench signal >generator? beacon transmitter? VFO for another radio? > >b) would you pay, say, $100 for a host board to operate your now-surplus >synthesizer? > >c) if someone *else *needed YOUR spare module for THEIR project, what >would you be willing to sell it to them for? Free? $25? More? > >73 es tnx >Steve KZ1X/4 ><kz1x at yahoo . com> > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
