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Here are some pics of the prototype I "junkboxed" together--sorry the
quality is so bad... http://blake.prohosting.com/mailguy2/ or: http://blake.prohosting.com/mailguy2/index.html click on the thumbnails for larger pic(s). The toroid has the winding grounded at center, there are 20 turns total--10 turns per side (way too many!!! I would suggest somewhere between 1-5 turns for 10 watts or greater!!!) And, for Richard, BOTH leds share a common current source through the FET... Later, when I have time, will sketch the schematic and post it here... PARTS LIST: 1) One aluminum panel to mount SO-239s' 2) Two SO-239's 3) Two hyper-brite LEDs (I would suggest LESS efficient leds--unless for QRP--these were just handy) 4) One 1K resistor 5) One MPF-102 Fet 6) Hookup wire If this isn't the most parts-efficient swr indicator in existance, one which is suitable for QRP thru QRO--then I'll eat this post!!! (well, granted, Cecils' "Two Lamp SWR Indicator" beats it--but then, this works on coax!!!) Build one! It works!!! Anyone know a QRP newsgroup where I can share this design with? Warmest regards, John -- When Viagra fails to work--you are DOOMED!!! "John Smith" wrote in message ... | This is a SWR bridge I built using leds and a homemade "directional | coupler." | | ALL critiques on it, and ideas for improvements are welcomed!!! | | Please excuse my rough drawing, I am NOT a draftsperson! | | Hopefully, the attachment of the .jpg was successful.... | | Warmest regards, | John | | |
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