Mal, Has the TA tests fizzled out or is anyone still interested across in the USA. I would TX over this weekend if anyone was listening/watching. Now would that TX be on the old and aging 120ft verti
Mal, I have now installed a loop each vert leg 50 ft approx x each horiz 105 ft =5250 sq ft. What are you using for a conductor? Series feed seems to be popular in the USA and a toroid matching trans
Hi Rik, What really looks interesting for a loop installation, according to the math, is the effective power gain that can be achieved by stretching the horizontal dimension. On my property I can mak
Hi Laurie, ......so for tranmitting it would seem to be a good idea to have a bottom wire on, or in the ground. The problem is that the soil losses become fairly large. Think of the loop wire with a
Of course, let us not forget my favorite loop erecting tool; the one that spelled the end to your castles, even before the appearance of modern cannon - the trebuchet. :) Seriously (before April Fool
Hi Dave, This sounds interesting. Are you able to model the "gain" of the loop against a 350ft inverted L fed against a 350ft counterpoise? Same amount of wire but not joined up... I assume your 350f
Hi Dave, The main problem with transmitting loops is the enourmous current and Voltage which is generated when exciting them with decent power. It's all very well to put 1W into a loop but try 1kW an
Mal, I experimented with multiturn 50'x50' vertical TX loops on 185k a couple of years ago and remember the net gain in the far field signal was much less than anticipated. Turned out that the additi
A couple of addition things I think are worth-while to mention about this meter: The cost in the US is $99 + shipping and the readout is 4 digits (in contrast to the 3 on my LRC meter). Additionally,
Rik, Does anyone have actualy measured the inductance of a big square loop ? I would be interested to check the measured values against the calculated ones. At my std 50ft x 50ft location, a #12 (2mm
Hi All, Late yesterday I re-installed the 200ft of 1/2" copper pipe in my std 50'/50' loop location. The pipe had been laying on the ground in the back woods for about 6 weeks while experiments with
Couple of addendum's to my earlier post: The ERP for 1w of input is now 81mw. To reach a 1w ERP the current multiplier will need to be only 1/.081 = 12.3 X 1.5 = 18.5A. It should be sq rt(1/.081) yie
Hi 136-ers, Everyone in EU is screaming to the ARRL and the FCC to permit you folks to use 1W erp. I have calculated the amperage to your loop to achieve this 1W erp and the figures frighten me. You
Hi Bob, Thanks for the suport <G> This guy is something else! It was starting to make my head ache too HAR Any up dates on the time to publish the final chapter on the Loop ?? Yes I finally found som
Mal, As the result of becoming gray from learning how to do things the hard way, I now conclude that it is far better to FIRST lay out the theory of what I am intending to design. This would include
Mal, I have wound a loading coil using decca 729 strands litz and another 2.5mm teflon insulated wire one and compared results. On air measurements and reports are identical, regardless of what theor
Mal and other Litz users, Nice to hear from you Bill and glad that you are still alive to tell the tale! This could be the final Litz installment for me - for a while anyway. As I said yesterday I in
Hi Tom, The theory of how Litz has an advantage over standard wire is well documented. A check of the Web will give one a good evening of reading. On the practical side I have conducted numerous loop
Mal, Yesterday I determined that my paint stripper actually did work to remove the covering on the Decca 729 litz. It took a lot more applications and brushings than I originally thought, but I was a
Jim, Your posting is like a breath of fresh air! (literally - after trying to use aspirin on the wire and becoming all but overcome with the fumes!). What you describe below, particularly the "imperv
