Skip to main content

Drag routing?

Comparing a nominally long-range dLink wireless router with a TP-LINK el cheapo box, to light up a laptop across the highway from the Internet link.

Mr El Cheapo works out about 7-9dB stronger signals (e.g. -69dB across the road instead of -78dB) with my TwinHead DuraBook laptop, yet only claims +3dB for the antenna, which is a short whip about ⅓ as long again as the dLink’s.

That has to be some kind of dipole, but my ARRL knowledge is so ancient that I’ve no real hope of recalling it.

Whatever it is, tomorrow will involve some time playing with RG58 cables, switches and/or hubs, & grunting the router around the building to defeat some structural irregularities which remain.

I’m of the firm opinion that dropping a second router across the road as a bridge will prove far more effective than relying upon Joe Random Tenant having a laptop with good reception — & would also offer the option of a wired connection since the routers typically come with a 4-port hub (some call it “a switch” but generally that’s not quite true).

Comments

Popular posts from this blog

every-application-is-part-of-a-toolkit at work

I have a LibreOffice Impress slideshow that I wish to turn into a narrated video. 1. export the slideshow as PNG images (if that is partially broken — as at now — at higher resolutions, Export Directly as PDF then use ‘pdftoppm’ (from the poppler-utils package) to do the same). 2. write a small C program (63 lines including comments) to display those images one at a time, writing a config file entry for Imagination (default transition: ‘cross fade’) based on when the image-viewer application (‘display,’ from the GraphicsMagick suite) is closed on each one; run that, read each image aloud, then close each image in turn. 3. run ‘Imagination’ over the config file to produce a silent MP4 video with the correct timings. 4. run ‘Audacity’ to record speech while using ‘SMPlayer’ to display the silent video, then export that recording as a WAV file. 4a. optionally, use ‘TiMIDIty’ to convert a non-copyright-encumbered MIDI tune to WAV, then import that and blend it with the speech (as a quiet b

new life for an old (FTX) PSU, improved life for one human

the LEDs on this 5m strip happen to emit light centred on a red that does unexpectedly helpful things to (and surprisingly deeply within) a human routinely exposed to it. it has been soldered to a Molex connector, plugged into a TFX power supply from a (retired: the MoBo is cactus) Small Form Factor PC, the assorted PSU connectors (and loose end from the strip) have been taped over. the LED strip cost $10.24 including postage, the rest cost $0, the PSU is running at 12½% of capacity, consumes less power than a laptop plug-pack despite running a fan. trial runs begin today.

boundaries

pushing the actual boundaries of the physical (not extremes, the boundaries themselves) can often remove barriers not otherwise perceived. one can then often resolve an issue itself, rather than merely stonewalling at the physical consequences of the issue.