Another item to add to the "tx antenna challenge" :
Successfull QSO with IZ2CPS (thanks Roby !) with -for transmission- a "double quad" antenna made from copper wire bent into an "8" figure, with copper-clad PCB (150 * 100 mm) as the reflector. No dish- just the double-quad as explained in Rothammel's antenna book. We had used this for a WLAN link spanning a few hundred meters years ago.
Now (with relatively slow, but human-readable CW) and 900 mW from a BU-500 tx converter running "barefoot" same old antenna spanned almost 40 Mm (mega-meters). No dish (for transmit), just the tiny double-quad antenna. Makes a nice 'reference gain' antenna for comparisons with various other TX-antenna tests.
Of course this little gadget (see attachment) is not sufficient for SSB, and I doubt the Chinese "8 Watt" (in reality 3..4 Watt) WLAN booster will make "dish-less" SSB QSOs possible. But I will see what the old homebrew 25 turn "WLAN DX helix" can do (without a dish, of course), and how it compares with a dual feed in a 40- or 60 cm offset dish. But that's another subject...
Wolf DL4YHF .