When dealing with music, I consider myself an audiophile. When I buy a CD, I rip it to my home server in the FLAC format; No, I don't carry loss less audio around on my portable devices... But I

Witness, in order of decreasing quality, conversations from: *) Analog phone -> analog phone *) Analog phone -> cell-phone *) cell-phone -> cell-phone, same technology *) cell-phone

Tim If this was professional radio, then I'd agree. But it isn't - it's hobby radio, and the goal is to experiment, not to provide a service-provider grade network. As a friend of mine recently

A good point! We'll have to see what shakes out as the experimenters "experiment" with linking digital systems. 73 de Tim, AF1G ---- Tyrell Berry <kd7kuj@...> wrote: ============= When dealing

... doesn't exist. This forum has been wonderfully active on a variety of topics. It's great to see the exchange as hams weigh in with their hopes and dreams, but there is one topic that I need to

Brian, The Winlink development team would be interested in purchasing two unitswhen available through our 501C3 organization the Amateur Radio safetyFoundation. www.arsfi.org We have anumber sights

the comment “ … doesn’t exist” is in accurate. Ardruino is very open source hardware. (all the way down to the boot loader, and development packages) Fpga projects can be open source

I would add that there has been a lot of work done looking at tandeming vocoders. Conclusion a noticeable loss in audio quality measured in the mean opinion score. If you could find a way to bridge

A few years back, there was an organization that developed two open source phone called the Openmoko Neo and Freerunner. The devices were nearly entirely open source... Everything but the GSM Radio,

True, useful in densely populated areas. Out where I am, where there's fewer repeaters and bigger distances, I'm concerned about the cost of that increased capacity - namely the effect on range,

Actually, there is a way, but it requires some money thrown at the problem. I have a German built DSP that is incredibly effectively at removing FM background noise. Maybe something to experiment

Another reason to push the network translation to the edge of the network, and another reason why EchoIRLP was better than other cross network solutions at the time. If you have multi protocol

Which is a good reason to be clever about how we do things. :) I'm a believer in fiddling with the signal as little as possible, for this very reason. 73 de VK3JED / VK3IRL http://vkradio.com

The argument that analog should never be linked to digital because of white noise and other artifacts forgets that Vocoders (as opposed to Codecs) like AMBE and Codec-2 are specifically looking for

John Completely agree. Where I’ve interworked FM to D-Star, I’ve found the results to be perfectly acceptable within the confines of Amateur Radio. You wouldn’t want to listen to

John, I think as long as the proper display is there, someone using the 1.2k gmsk modem with analog audio (or echolink with callsign pass-through) won't really be noticed. It will probably require

Matthew, The truth of the matter is, for linking, it just doesn't matter. Having a proper callsign in the "MY" field only matters in two places: 1. If going through an Icom G2 gateway which looks to

The entire “MY” call is unenforceable. It is sent in clear text, is programmed by the user and therefore is suspicious. By default, my code does not check D-Star MY calls for one simple

A key issue identified many years ago is that control over what sort of traffic should be allowed to pass through a gateway should be in hands of the administrator of that particular gateway/repeater.

At the end of the day, all that the majority of people want to be able to do is talk to their friends around the world, and not have to jump through political hoops to do so. Similar observations in