Ramblings of yet another nerd…
So, I sold my scanner. I needed something that could monitor P25 Phase 2, in addition to Phase I and analog signals. I could have spent $600 or more on an SDS100 or SDS200 – and some day, I might… but looking at what I had on-hand, I wanted to see what I could do …
Read More SDRTrunk…
The experiment: Using a TV antenna directly as an amateur radio transceiver antenna. The background: Many websites and magazine articles exist wherein the author has disassembled a TV antenna and re-used the parts to construct a yagi-style antenna. Based on the feeding arrangement for the elements, it appeared that the basic TV antenna design is that of a …
Read More TV Antenna re-work… another old post worth sharing
OK – this is another issue that sparked quite a bit of discussion, and is worth putting out here for others to consider. Differential signals are a great concept – the transmitter transmits the signal between two wires, which connect directly to the receiver. The receiver then measures the DIFFERENCE (hence “differential”) between the two …
Read More On Differential Signalling between subsystems….
It took over a week, a complete network reconfiguration, and a lot of google searching to figure this one out. I wanted my MMDVM on P25 for a number of reasons. It should have been as easy as turning the mode on, and selecting a default host, right? well… maybe? It didn’t work that way …
Read More MMDVM on P25…
“Your codeplug will never be complete” – a quote I saw on a site about amateur radio DMR codeplug generation. I’ll argue against that thought. I wish I could get all of the background info I wanted in here – but I haven’t had the training I would like. There are entire Motorola hosted courses …
Read More Some thoughts on codeplug design and layout
Honestly, DMR is getting me excited about UHF/VHF amateur radio again. It’s not a NEW technology by any means, but the concept is really cool – I can have a drivetime chat with my buddies in Ohio, Alabama, and Iowa – assuming they have access to the repeaters. The biggest challenge was wrapping my head …
Read More DMR and Hotspots…. something else to break?
This is an old post, pulled from one of my older websites – at the time, i was going for a CLEAN install, and speakers were a problem for space – so here’s my solution. This was part of a series on the overall install, including the use of a Jotto desk purpose-built console (Vehicle …
Read More 2002 Ford Explorer Overhead Console Speaker
occasionally at work, I have the need to perform some weak signal work, much like trying to get that last multiplier during November sweepstakes. At my previous employer, I let one of the technicians try out my Heil Proset Plus for listening work- he loved it. those headsets are made to be worn all day. …
Read More headphone phase reverse
After much experimenting and trial and error, I got almost all of the radio functions tested and working. I did run into an interesting problem, though. If I included ALL of the Icom CI-V enabled radios, and included 2 “spare” integers with the lookup structure, the Arduino would fail out after 180 items in the …
Read More More Icom Remote Device Updates
It has been a LONG time since I seriously did any C programming… and structures were something we only vaguely touched on in class. I’ve already used up about 60% of my dynamic memory – a huge chunk of it is the array of structures, containing a string, a hex byte, an integer, and 2 …
Read More Still working on the Icom Project