[Elecraft] Camping radio ops: then and now

[Walter Underwood]

I was writing software for radios in 1981. Diagrams might help understanding, but the source code is the equivalent to a schematic. We already have a block diagram for the KX3 and people keep complaining.

http://www.elecraft.com/manual/KX3%20Manual%20Block%20Diagram.pdf <http://www.elecraft.com/manual/KX3%20Manual%20Block%20Diagram.pdf>

I’m still pretty danged curious about the noise reduction. I think it is based on a Kalman filter with the “known signal” input generated from a lowpass-filtered or averaged version of the input. But I won’t figure that out from the block diagram. So, not useful to me.

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Oct 5, 2016, at 6:20 PM, Matt Maguire <matt.vk2rq at gmail.com> wrote:
> 
> Source code is too low level to get a conceptual understanding of what the software is doing -- a software architecture diagram is likely to be more useful for that. (in a similar way, for hardware a schematic diagram abstracts out implementation details such as PCB layout and track routing to make it clearer how the circuit works at a conceptual level).
> 
> 73, Matt VK2RQ
> 
> 
> 
> 
> On Thu, Oct 6, 2016 at 11:59 AM +1100, "Walter Underwood" <wunder at wunderwood.org <mailto:wunder at wunderwood.org>> wrote:
> 
> These days, the source code matters as much as the schematic. Want to find the Weaver SSB demodulator? That is in software.
> 
> wunder
> K6WRU
> Walter Underwood
> CM87wj
> http://observer.wunderwood.org/ (my blog)
> 
> > On Oct 5, 2016, at 5:43 PM, Phil Wheeler  wrote:
> > 
> > Why "But the KX2 has no schematics for the customer, so that prevents my purchase.", Mike?  Mine works just fine, without schematics.
> > 
> > Phil W7OX
> > 
> > On 10/5/16 5:37 PM, Mike Morrow wrote:
> >> Around 1960 to 1962, on my family's tent camping trips to remote locations in the Arkansas Ozarks, I would help my dad set up his Drake 2-A receiver, Multi-Elmac AF-67 AM transmitter, and 80m dipole in the trees.  Power was from a military surplus 120 vac 300 watt generator (run only if no body was camped nearby).
> >> 
> >> When I got out of the Navy 37 years ago, I immediately returned to Arkansas campsite ham ops with the new TS-120S, MFJ tuner, and deep-discharge battery.  (Most of the areas my family had camped years earlier had become the Buffalo National River.  I return there every Fall that circumstances allow.)  This type of ham operations will always be my favorite use of radio.
> >> 
> >> My now-defunct K1 had been my principal camp rig since 2001.  I'd like to replace it with a KX2 immediately.  But the KX2 has no schematics for the customer, so that prevents my purchase.
> >> 
> >> Mike / KK5F
> > 
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