Step 8: Packup for Transportation.

I did say that this was transportable, didn't I?
If you don't have a car with at 1.2m x 1.2m x 2.4m storage compartment, then try the following:

Remove upright from base.
Remove 4x 600mm pipes from base strut.
Rearrange to form a bundle of pipes ~2.4m long and <100mm in circumference.

If you want to get REALLY clever-pants, then cut the upright in half, and add a pipe-collar or use a piece of pipe with integrated joiner so that you can fold the thing down to only ~1.2m long, just like in the photo.
Yay, Pratchett reference!<br> <br> <sub>(Did you know that the Reverend Lord George Murray invented a<a href="http://www.scottish-places.info/people/famousfirst2137.html"> shutter-based telegraph</a> that could send messages from London to Portsmouth [about 75miles] via a network of towers in just one minute? It was used during the Napoleonic Wars - IMO it was the inspiration for the system Pratchett described in <em>Going Postal</em>.)</sub>
That was my first thought to! I must confess I was hoping for a recreation of a clackstower but this is good to.<br> &lt;sub&gt;<br> (Did you know<a href="http://homepage.ntlworld.com/forgottenfutures/fax/fax.htm"> the electrical telegraph was capable of sending pictures</a> as well as text? There were many systems including purely analog ciphering methods but my heart is always with this <a href="http://homepage.ntlworld.com/forgottenfutures/fax/fax_6.gif">proto-fax</a>)<br> &lt;/sub&gt;<br>
It really is amazing what they did. There is an excellent book that talks about some of this called <a href="http://www.amazon.com/Victorian-Internet-Remarkable-Nineteenth-line/dp/0425171698">The Victorian Internet</a> that I would like to read (donations welcome, ship to LPO BOX 350, Parkholme 5043 AUSTRALIA :)<br> <br> Paul.
As I type, I have the beginnings of a &quot;proper&quot; version in my head, but it will have to wait until we get better weather or I get access to a bigger workshop.
I would be interested in anything you come up with.<br>One nice thing I discovered with the PVC pipe is that it is very bendy, and so allows a taller tower to bend in the wind, just like the Dearheart's plans for the MK2 towers in Going Postal. <br><br>In fact, I will probably experiment with mounting WiFi antenna on a length of unguyed or lightly guyed PVC pipe as a cheaper easier option to guyed steel rod. Also, PVC doesn't attract lightning quite so much (thorry Igor).<br><br>Paul.
<br> &lt;sub&gt;Oh, I've found <a href="http://www.portsdown-tunnels.org.uk/ancient_sites/telegraph_p1.html">more details</a>.&nbsp; The shutter-telegraph was eventually replaced with an arm-telegraph very similar to your design, but larger.<br>
Hello,<br>First, thanks for your enthusiasm for my little project :)<br><br>Yes, the shutter-telegraphs were replaced with arm-telegraphs after Claude Chappe did experiments with visibility in France, and found that angled rods were resolvable at greater distance than were coloured panels.<br><br>From my perspective, I wanted the best bit-rate-per-dollar I could manage at bottom dollar, so a semaphore arm that can (under optimal conditions) encode an analog signal equivalent to many bits was the answer. <br><br>In fact, the difficulty of actually encoding more than 2 or 3 bits with the semaphore arm just adds to the educational value from my perspective, as (hopefully) the students will realise that 1 bit is easy, 2 bits is doable, and 3 bits probably slows the thing down so much and/or introduces such a high error rate that it is faster to use fewer bits-per-baud, and thus a valuable lesson will have been learned, that is directly relevant to the variable bit-rates of WiFi, and DSL latency versus throughput optimisations.<br><br>Paul.
Oh, and I've just noticed that you classified this under &quot;wireless&quot;... <br><br>:-D

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