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Groups > comp.os.linux.misc > #89476
| From | rbowman <bowman@montana.com> |
|---|---|
| Newsgroups | comp.os.linux.misc |
| Subject | Re: WiFi range ... |
| Date | 2026-08-02 19:44 +0000 |
| Message-ID | <nd9l0tF4198U12@mid.individual.net> (permalink) |
| References | (4 earlier) <114j9ep$34k3s$5@dont-email.me> <XJSdna6bFYjt9PD3nZ2dnZfqnPadnZ2d@giganews.com> <nd5do7Flu8eU12@mid.individual.net> <KR-dnZuVRtVzAPP3nZ2dnZfqnPUAAAAA@giganews.com> <1464km-tao.ln1@robpc4.robk-home.org> |
On Sun, 2 Aug 2026 11:59:29 -0400, Robert Komar wrote: > Back when I was an student in the 80's, one mechanical engineering > professor described doing wet/dry bulb measurements. The thermometers > were tied to lanyards, and you would whirl them around in the air at a > certain rate to get more air flow over the bulbs during the measurement. > It increased the difference between the wet and dry readings for better > accuracy, and the tables were adjusted for that affect. My old > thermodynamics textbook has a Psychrometric Chart in the back that you > could use for calculating the absolute humidity from the temperatures. > It doesn't say whether the bulbs should be whirled around or not, maybe > that was common knowledge back then. https://ktagage.com/product/sling-psychrometer/ The video shows the use of the charts. Barometric pressure comes into play too. I assume that takes into account elevation. The side by side types probably are good enough although with no motion the air around the wet bulb will be affected by the evaporation. Digital hygrometers measure the capacitance or resistance of a moisture sensitive material. The common DHT11 uses resistance which isn't as accurate as capacitance but what do you want for $3? One of the Accurite pages mentions both methods but doesn't say which is used. In both cases onboard processing handles the raw measurements of the thermistor and humidity sensor I suppose I could build a 70 cm Yagi and go fox hunting to find the Accurite unit but whoever owns it probably wouldn't be happy with me taking it apart.
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Recent Experience With RF "Modem-ish" Data Links ? c186282 <c186282@nnada.net> - 2026-05-25 01:46 -0400
Re: Recent Experience With RF "Modem-ish" Data Links ? rbowman <bowman@montana.com> - 2026-05-25 17:56 +0000
Re: Recent Experience With RF "Modem-ish" Data Links ? c186282 <c186282@nnada.net> - 2026-05-26 01:27 -0400
Re: Recent Experience With RF "Modem-ish" Data Links ? TheLastSysop <thelastsysop@dev.null> - 2026-05-26 22:11 +0000
Re: Recent Experience With RF "Modem-ish" Data Links ? c186282 <c186282@nnada.net> - 2026-05-26 23:04 -0400
Re: Recent Experience With RF "Modem-ish" Data Links ? rbowman <bowman@montana.com> - 2026-05-27 03:21 +0000
Re: Recent Experience With RF "Modem-ish" Data Links ? c186282 <c186282@nnada.net> - 2026-05-27 00:18 -0400
Re: Recent Experience With RF "Modem-ish" Data Links ? rbowman <bowman@montana.com> - 2026-05-27 07:09 +0000
Re: Recent Experience With RF "Modem-ish" Data Links ? Nuno Silva <nunojsilva@invalid.invalid> - 2026-06-04 17:40 +0100
Re: Recent Experience With RF "Modem-ish" Data Links ? c186282 <c186282@nnada.net> - 2026-06-04 14:43 -0400
Re: Recent Experience With RF "Modem-ish" Data Links ? rbowman <bowman@montana.com> - 2026-06-04 23:09 +0000
Re: Recent Experience With RF "Modem-ish" Data Links ? c186282 <c186282@nnada.net> - 2026-06-04 23:14 -0400
Need for new personal ID numbers Lars Poulsen <lars@beagle-ears.com> - 2026-06-04 20:46 -0700
Re: Need for new personal ID numbers c186282 <c186282@nnada.net> - 2026-06-05 01:29 -0400
Re: Recent Experience With RF "Modem-ish" Data Links ? rbowman <bowman@montana.com> - 2026-06-05 04:53 +0000
Re: Recent Experience With RF "Modem-ish" Data Links ? c186282 <c186282@nnada.net> - 2026-06-05 02:13 -0400
Re: Recent Experience With RF "Modem-ish" Data Links ? Andy Burns <usenet@andyburns.uk> - 2026-06-05 09:26 +0100
Re: Recent Experience With RF "Modem-ish" Data Links ? c186282 <c186282@nnada.net> - 2026-06-05 05:24 -0400
Re: Recent Experience With RF "Modem-ish" Data Links ? rbowman <bowman@montana.com> - 2026-06-05 17:36 +0000
Re: Recent Experience With RF "Modem-ish" Data Links ? c186282 <c186282@nnada.net> - 2026-06-06 00:16 -0400
Re: Recent Experience With RF "Modem-ish" Data Links ? rbowman <bowman@montana.com> - 2026-06-06 06:08 +0000
Re: Recent Experience With RF "Modem-ish" Data Links ? c186282 <c186282@nnada.net> - 2026-06-06 02:43 -0400
Re: Recent Experience With RF "Modem-ish" Data Links ? rbowman <bowman@montana.com> - 2026-06-06 20:19 +0000
Re: Recent Experience With RF "Modem-ish" Data Links ? c186282 <c186282@nnada.net> - 2026-06-07 05:54 -0400
Re: Recent Experience With RF "Modem-ish" Data Links ? rbowman <bowman@montana.com> - 2026-06-07 19:43 +0000
Re: Recent Experience With RF "Modem-ish" Data Links ? The Natural Philosopher <tnp@invalid.invalid> - 2026-05-27 14:14 +0100
WiFi range ... Lars Poulsen <lars@beagle-ears.com> - 2026-05-31 21:19 -0700
Re: WiFi range ... TheLastSysop <thelastsysop@dev.null> - 2026-06-01 04:26 +0000
Re: WiFi range ... Lars Poulsen <lars@beagle-ears.com> - 2026-06-01 22:44 -0700
Re: WiFi range ... Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-07-31 23:00 +0000
Re: WiFi range ... c186282 <c186282@nnada.net> - 2026-07-31 23:34 -0400
Re: WiFi range ... rbowman <bowman@montana.com> - 2026-08-01 05:15 +0000
Re: WiFi range ... c186282 <c186282@nnada.net> - 2026-08-01 21:30 -0400
Re: WiFi range ... rbowman <bowman@montana.com> - 2026-08-02 04:13 +0000
Re: WiFi range ... c186282 <c186282@nnada.net> - 2026-08-02 01:23 -0400
Re: WiFi range ... "Carlos E. R." <robin_listas@es.invalid> - 2026-08-02 14:26 +0200
Re: WiFi range ... The Natural Philosopher <tnp@invalid.invalid> - 2026-08-02 15:00 +0100
Re: WiFi range ... rbowman <bowman@montana.com> - 2026-08-02 19:46 +0000
Re: WiFi range ... c186282 <c186282@nnada.net> - 2026-08-02 22:57 -0400
Re: WiFi range ... Robert Komar <robk@robpc4.robk-home.org> - 2026-08-02 11:59 -0400
Re: WiFi range ... rbowman <bowman@montana.com> - 2026-08-02 19:44 +0000
Re: WiFi range ... c186282 <c186282@nnada.net> - 2026-08-03 00:12 -0400
Re: Recent Experience With RF "Modem-ish" Data Links ? Andy Burns <usenet@andyburns.uk> - 2026-06-01 08:10 +0100
Re: Recent Experience With RF "Modem-ish" Data Links ? TheLastSysop <thelastsysop@dev.null> - 2026-06-01 07:33 +0000
Re: Recent Experience With RF "Modem-ish" Data Links ? c186282 <c186282@nnada.net> - 2026-06-02 01:35 -0400
Re: Recent Experience With RF "Modem-ish" Data Links ? c186282 <c186282@nnada.net> - 2026-06-02 01:15 -0400
Re: Recent Experience With RF "Modem-ish" Data Links ? Lars Poulsen <lars@beagle-ears.com> - 2026-06-01 22:50 -0700
Re: Recent Experience With RF "Modem-ish" Data Links ? c186282 <c186282@nnada.net> - 2026-06-02 03:04 -0400
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