davelx's latest activity
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davelx replied to the thread Help to identify this please.Google says: Aritech DR series passive infrared (PIR) sensor, most likely the Aritech DR115 or DR110, which was widely manufactured and... -
davelx replied to the thread Virgin Media, driveway dig up..Huh, youngsters! 1992, 300baud dial-up acoustic coupler, demon internet was the isp, homebuilt PC, MSDOS.
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davelx reacted to morqthana's post in the thread Fitting an isolator between meter and consumer unit. with
Thanks.
That's not an item of switchgear. There is no ban on plastic accessories. -
davelx replied to the thread Plug in solar.It's a quantum circuit!! What happens when you observe it?:giggle:
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davelx replied to the thread Virgin Media, driveway dig up..And the main reason they do that is that VM ties them to time/cost/productivity targets that make it impossible to do anything else!
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davelx replied to the thread Phone Cable Question.GPON is a form of WDM. It uses one lamda each way on the "last mile" with up to 1:32 splitters using 1290-1330nm upstream and...
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davelx replied to the thread Phone Cable Question.There are standards governing the wavelengths used, so I would think (I retired just as this technology was being rolled out into...
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davelx replied to the thread Phone Cable Question.Yes, indeed. I'm referring to the in-street cab PoPs (Point of Presence), which take the exchange trunk and split down to multiple PoCs...
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davelx replied to the thread Phone Cable Question.The splitters don't just split, they do WDM mux and demux.
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davelx replied to the thread Phone Cable Question.Passive optical splitters. It's very clever technology.
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davelx replied to the thread Meter Reading Change for our Freehold.The Electricity Act 1898 required that meters are certified for a finite lifetime and in domestic premises must be replaced when that...
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davelx replied to the thread 198 kHz qrt.The second set has a mixer oscillator that runs 465kHz (the IF) offset from the frequency being received, to create the IF signal which...
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davelx replied to the thread 198 kHz qrt.My dad and I used to listen in to SSB transmissions placing a second, superhet receiver close to the main receiver, tuned so that it's...
