Kevin wrote: Actually Michael, I think AM'ers may run the most diverse group of rigs on the air. I've worked (or run) everything from modern imported solid state equipment, classic american boat anchors, restored military equipment, re-purposed broadcast gear, modified marine equipment, Class D, E, or H homebrew equipment running at incredible efficiencies with amazing fidelity, qrp rigs built on cake pans or wooden boards, heavy iron plate modulated rigs and exotic exciters driving big amps, and increasingly SDR gear. ...and one old gentleman who has built a modulator for his 10kw Alexanderson alternator using plans sketched on a napkin by Brian Lloyd following a lengthy wine tasting..
On Fri, Feb 18, 2011 at 5:15 AM, Kevin Feeney <[email protected]> wrote: > > On 2/17/2011 6:27 PM, Michael Tondee wrote: > >> I usually associate AM operation with the classic radio buffs or >> "boat anchor" collectors. Obviously, judging by this thread, not >> everyone who operates AM fits this category but I have to wonder >> what some of these guys think when they hear one of the "newfangled >> Flex SDR's" on AM! >> Michael >> > Actually Michael, I think AM'ers may run the most diverse group of > rigs on the air. I've worked (or run) everything from modern imported > solid state equipment, classic american boat anchors, restored > military equipment, re-purposed broadcast gear, modified marine > equipment, Class D, E, or H homebrew equipment running at incredible > efficiencies with amazing fidelity, qrp rigs built on cake pans or > wooden boards, heavy iron plate modulated rigs and exotic exciters > driving big amps, and increasingly SDR gear. Many of us run a variety > of equipment as the mood strikes. Some days I like tubes and a butter > smooth VFO dial, some days I need a panadapter fix. Some days I hike > with a solid state rig in a backpack with a whip. It's nice to have > choices. :-) > > I think the Flex SDR's are earning a good reputation within the AM > community. The transmitted audio is excellent, and everyone > appreciates the filtering capabilities and the synchronous detector. > Like with the other modes, there are things that could be optimized > further but I expect that will come with time as other priorities are > worked through. A few folks are experimenting with other SDR systems > as well. > > A lot of the folks I've worked lately have been hanging softrock > boards off the IF of their classic gear (Drake R4, R390, etc) and > running PowerSDR for the filtering and detector. It's getting to be a > very popular mod. Despite the affinity for a classic form of > modulation, I think you'll find many AMers embrace new technology > readily and bend it to serve their needs. > > > Speaking of pilot carriers and other interesting forms of modulation, > I got to wondering about the possibility of generating independent > sidebands (ISB) with the Flex. At Harris our gear used filtering to > generate 2 ISB, or 4 ISB with pilot carrier. On our HF circuits we > would typically run RTTY on LLSB, and LSB, and voice circuits carrying > telephone traffic on USB and UUSB. Not sure I see a big use for such > a capability in amateur service. Maybe send SSTV on one sideband while > talking on the other. Mostly just curious if the 'magic' in the > software would permit such a capability. Thinking direct generation of > two independent sidebands wouldn't be simple, but that a variation of > the multi-receive capability in reverse as it were, might. > > de Kevin, WB2EMS > > > > > > _______________________________________________ > Flexedge mailing list > [email protected] > http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz > This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used > for posting topics related to SDR software development and experimentalist > who are using beta versions of the software. > _______________________________________________ Flexedge mailing list [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used for posting topics related to SDR software development and experimentalist who are using beta versions of the software.
