The Strowger Appreciation Site edit / delete

A collector who owns several telephone exchanges, among other things. He's recently restored the Glen Prosen 1950s exchange, which had apparently been sitting in a hut at the top of the glen until 2009 or so...

to aerial clock electronics retrotech telephone tv ... on 26 June 2018

The Ultimate Guide to 11 Meter CB Antennas edit / delete

A surprisingly good reference to antenna design from an "11 meter" enthusiast. (This being one of those bands that has wavelengths long enough to make antenna design nontrivial, but not so long that you're always compromising...)

to aerial antenna cb ham radio ... on 08 February 2010

EH antenna homepage edit / delete

More analysis. The basic stuff is interesting, but then it... stops.

to aerial amateur eh hf microvert radio small-aerial ... on 09 January 2010

Radiating feeder: Applying a theory. edit / delete

More Microvert/EH analysis, with suggestions on taking advantage of feedline radiation.

to aerial amateur eh hf microvert radio small-aerial ... on 09 January 2010

The DL7PE-MicroVert edit / delete

Another small HF aerial design, but this one's explicitly designed to use the download as a counterpoise. This appears to be the approach that Firestik's no-ground-plane antennas use. The PDF gives all the design equations, which is nice.

to aerial amateur hf microvert radio small-aerial ... on 09 January 2010

THE EH ANALYZED edit / delete

Modelling EH antennas using SPICE. This produces some interesting results.

to aerial amateur eh electronics hf isotron modelling radio small-aerial spice ... on 09 January 2010

ZL1CLG edit / delete

Building EH antennas from the sort of "components" that, say, Wilkinsons sell. (And more speculation about how they work.)

to aerial amateur eh hf radio small-aerial ... on 09 January 2010

Site of Lloyd Butler VK5BR edit / delete

And this is someone who has some serious clue about antenna design playing with the EH/Isotron approach -- on the X2/X3 pages, he's doing experiments to figure out how it actually works, and what you need to do to make it work well. The results are nonobvious.

to aerial amateur eh hf isotron radio small-aerial ... on 09 January 2010

L'ANTENNE ISOTRON edit / delete

Right, this is more interesting: this guy twigged that the Isotron and EH antennas look like they're operating on similar principles, and came up with a simpler design drawing on both, which can be homebrewed with some plastic pipe and old hard disk platters (!). Looks like it works well. There's a PDF here giving simple instructions for building the CB version.

to aerial amateur cb eh hf isotron radio small-aerial ... on 09 January 2010

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