Dick PA0SE and others, Thanks for doing further tests for phasing. I cannot measure the phase difference between currents in and out of the coil. I don't have a current probe with my scope but even i
Dick PA0SE and others, Thanks for trying out the dual trace scope method. You did not comment on the phase at the hot end of the coil compared to the cold end. I followed up Bob's suggestion using a
Further to the item I have recently sent, I have since realised that the suggestion of observing two ammeters may not show different peaking conditions, as the reactive current in the stray capacitan
Hi all following this theme, I have thought of a further test to explore phase differences of current into the cold end of the loading coil and current making it out the hot end. With two RF ammeters
Dick, Thanks for providing some more measured data: I adjusted the transmitter for 2A aerial current flowing into the strapped feeder wires. Current in the connection from the coil to the central hea
Steve, I have some comments as to "where does the current go"? Comments are below: Today, I made some more antenna current measurements on my 12 m vertical (and my shiny new loading coil), using a th
Steve, Do I take it that your loop lies in a horizontal plane? Most of the frame loops for LF receiving are in a vertical plane. Thus there is a further matter of polarisation to consider (and it is
Andy and others, re Jim's comments : I was not proposing just slowing Wolf down, I was arguing the merits of using Uncoded BPSK for the same performance (a-la VE2IQ & Coherent) but at 1 b/s - this wo
John G4CNN, Dick PA0SE mentioned recently that radiation from the loading coil is approximately equivalent to the radiation from a piece of wire of the same length. This must surely mean that the red
Jim M0BMU, Thanks for the preliminary information on quieter parts of the 165 - 190 kHz band. Mike's request for info reminds me - A while ago, I tried listening around 184.4 kHz, where the recent "t
Mike G3XDV, The ZL6QH erp was approximately 1 watt when VE7SL received us around his sunrise on 30 June. The ZL6QH long wire antenna has been optimised for 160 and 80 metre contesting, and is a compr
Hi all, Andy wrote: Looks as if allocations at 9kHz could be a headache. If below 9kHz is not allocated by ITU then administrations cannot issue licences / NoVs. No ITU allocation means that there is
Rik, The information on the ZL6QH to VE7SL confirmation has been sent to a number of amateurs. A schedule for 7 July has also been posted widely, including to the RSGB reflector. > .... we would only
To all on the RSGB reflector, As there is now wider interest in the tests, following the ZL to VE7 result last weekend, this information is (somewhat optimistically) being posted to the RSGB reflecto
CLAIM OF ZL TO VE AMATEUR LF DX 5 July 2001 On Saturday 30 June ZL1WB, ZL6QH, ZL3VN, ZL3FJ, ZL3PN, ZL3JE, ZL4OL and AX2TAR (VK7ZAL) transmitted test signals in the 160 - 190 kHz band, for so-called t
Tom G3OLB, Talking of TS-850s, does anyone know why my TS-850 changes gain at 500.000 KHz? Seems like an attenuator is switched in above 500 KHz. Is there a mod to defeat it? The TS-850 is manufactur
Wolf DL4YLF, In response to your questions on what type of balanced feeder I use to my active antenna, it was originally a "data cable" that I obtained second hand at very low cost. It is a plastic s
Wolf DL4YLF, OK on receiving 50 Hz hum modulation from TV sets. supply lines. I already >considered building a battery-powered remove RX with a 70cm-FM-link to the >main station (using a cheap 70cm-L
Brian, 1925 first Have you tried ZL sunset? Yes, and got nil, but with current sunrise/sunset times there is no "dark path to Germany" around ZL sunset. In six months time it will have "changed aroun
Hi all, 183 kHz has once again been receivedafter ZL sunrise, fading out around 1925 Z. I was too late in turning the gear on to find out when the signal first arrived this morning. So far I've found
