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(2016-01-14, 00:41)kevinmcc Wrote: What about adding MOD-1016v8 lightning detector?
Just asking, not concerned as I am an electronics tech.
Tried one on my red system, the best thing I can say about it is that it is a pile of junk, don't bother wasting time and money on this as they don't work with any reliability (if at all) and add nothing other than novelty value to the system.
Ben.
RED Station: 878, Flightradar24: F-EGLF1, Open Glider Network: Aldersht2, PlanePlotter: M7.
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First time on the forum for a few months and not a lot seems to have changed since I last looked. I was looking for a status report on System Blue but cannot find anything newer than some months old. Would appreciate if there is an update somewhere, if someone could advise what the URL is for where that update is posted. I have bought myself a new soldering station in anticipation of it having some work to do, as my old iron is one of those induction jobs, not suited to fine PCB work.
Wilson
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(2016-03-01, 11:01)wilsonlaidlaw Wrote: First time on the forum for a few months and not a lot seems to have changed since I last looked. I was looking for a status report on System Blue but cannot find anything newer than some months old. Would appreciate if there is an update somewhere, if someone could advise what the URL is for where that update is posted. I have bought myself a new soldering station in anticipation of it having some work to do, as my old iron is one of those induction jobs, not suited to fine PCB work.
Wilson
search for this message, and you'll find some recent into ....
Blitzortung.org Forum › Internal › Blitzortung.org in general ![[Image: arrow_down.png]](http://forum.blitzortung.org/images/arrow_down.png) › Things seem awfully quiet these days...
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2016-03-01, 13:43
(This post was last modified: 2016-03-01, 13:47 by Tobi.)
@Michael: This was just in the internal forum.
The first final PCBs for delivery should arrive soon. But we still might need time for modifications - if necessary. As always we start with just a few boards and raise quantities during the next months. Additionally the hardware will still be improved
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Tobi,
Many thanks for the update
Wilson
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Wilson, you probably missed the preview pics fom the proto on the
'Project Description' tab on the furbished homepage:
http://en.blitzortung.org/cover_your_area.php
PS: Looks very need, but as an RF engineer, I get some headache seeing
the antenna inputs in close proximity to the noisy network connection ...
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2016-03-01, 19:55
(This post was last modified: 2016-03-01, 20:09 by cutty.)
(2016-03-01, 19:02)Bonzo Wrote: ...
PS: Looks very need, but as an RF engineer, I get some headache seeing
the antenna inputs in close proximity to the noisy network connection ... Those are not antenna inputs on the BLUE main box.... those are channel signal inputs from the preamps. The H-antennas/preamp, and E-probe/preamp, are typically at some distance from the controller...(E probe should be outside of structures, e.g.) and there is no issue with the network connection, assuming instructions are followed. However, having the antenna/probe/preamps in proximity to computers, etc, can cause issues. Many current "RED" system E amplifiers already run right next to the current RED controller, without issue. This is being simplified with BLUE, going to the current E preamp concept for both fields, with amplifier/processing simply moving to what would correspond to the controller board in system RED. The main amps/processing circuitry can work quite well on the main board, in proximity to the network, GPS and microprocessor. . Again assuming instructions are followed.
Also ... 3-30 kHz energy impulses are what we're mainly interested in, not a specific frequency although we expect a BW on BLUE up to about 160 kHz. Lots of filtering, and custom filtering will be enabled when BLUE matures. (Not necessarily capable on initial releases.. only for technically advanced operators)... Because of that 'spectrum of interest', I often think of the system as a 'super digital audio processor" rather than "RF"...
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It's just a feeling, Cutty!
a scenario: once you have crosstalk from the network- to the
signalcables these cables become antennas and then the signals
come close to the antenna/sensor preamps. The filters will work only
well for differential mode signals. So the out-of-band signals might, under
circumstances, cause nonlinear behaviour of the preamps.
Everything stands or falls with proper grounding.
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(2016-03-01, 21:53)Bonzo Wrote: It's just a feeling, Cutty!
a scenario: once you have crosstalk from the network- to the
signalcables these cables become antennas and then the signals
come close to the antenna/sensor preamps. The filters will work only
well for differential mode signals. So the out-of-band signals might, under
circumstances, cause nonlinear behaviour of the preamps.
Everything stands or falls with proper grounding. Yep. One of the things I meant when I mentioned 'follow instructions'...  down to what cables to use.
For e.g. Red specifies ONE GROUND only! Specifically, the one on the controller board. Many stations don't even need that one. Our issues haven't been with 'grounds' so much as other interferers, (outside of poor USB power supplies) such as NATO and other Submarine transmitters, remote control lawnmowers, electric fences, etc... and in my case, a Welding Line on a Truck Axle Factory a half mile away, and stupid failing Vapor Street Lights.
The developers pretty much have this in hand...  I'd have to go check, but I don't think BLUE will even call for an external ground... don't remember...
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The first filter on controller is a passive low-pass -60dB at 200KHz
We use input transformers to avoid ground loops (H-Field)
There are gain in Pre-Amps (20dB) in H-Field, so signals are already lifted before added the first signal-cable.
Even a close capasitive coupling between network and signal cables, have very low influence - I have never seen it, and I have network and signal cables bundled over severel meters.
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