To All from PA0SE, Starting around 2000 UTC tonight I intend to do beaconing using QRSS30 DFCW, shift about 0.5Hz. Dash frequency 135922 Hz; crystal controlled; power about 70mW EIRP. If there are ob
Eduardo, EA3GHS wrote At 09:42 31-1-05, you wrote: Last saturday nigth (20:45utc), I saw the signal from PA0SE, -40dB under the strong DCF, and +7 dB over the noise. I saw a lot of QRN from a far sto
Dear Gus, FB signal into JO22GD all through the night. At first accompanied by the very strong signal from DJ8UX. 73, Dick, PA0SE At 20:32 2-2-05, you wrote: Dear LF Group. Beacon run also this night
Sorry, DJ8WX of course. Dear Gus, FB signal into JO22GD all through the night. At first accompanied by the very strong signal from DJ8UX. 73, Dick, PA0SE At 20:32 2-2-05, you wrote: Dear LF Group. Be
To All from PA0SE Alex, RA9MB wrote: I will observe around 135922 next night. Please any QRSS120/60 beacons. Unfortunely this frequency is noisy here usualy. But some times it is clear. I will probab
Hello Dmitri, Thanks for the report. What is your locator and QTH? Mine is JO22GD and Leiderdorp, The Netherlands.. 73, Dick, PA0SE At 01:10 4-2-05, you wrote: Hi Dick See you "M" in qrss30 Dmitry Di
Hello World, here come our signals ;-) I intend to join Teo again tonight on 135922.3/.4 DFCW, starting about 22:00. Anybody else? Yes, I intend to be on the air as well using DFCW QRSS60. I will pul
To All from PA0SE William, PA0WFO, has on loan a Ropex "The First" LF transmitter. Now I seem to remember that long ago someone had trouble when this TX was connected to a tap on the loading coil. It
Thanks Dave, That is exactly the info that PA0WFO can use to his advantage. 73, Dick, PA0SE At 22:22 16-2-05, you wrote: Dick Have a look at http://www.wireless.org.uk/ropex.htm I put a pi network (L
To All from PA0SE Just gave William, PA0WFO, his first QSO on LF. He is located at Oostvoorne, locator JO21BV, using a Ropex "The First" transmitter with an aerial wire, only 23 m long and 5 m high.
To All from PA0SE German DARC magazine CQ-DL 3-2003 contains a review of a digital receiver designed and made by HB9CBU. It covers 1.65 - 30 MHz. See attached block schematic diagram. The following r
To All from PA0SE Several amateurs have found that the current at the bottom end of the loading coil is higher than at the top (aerial side) of the coil. In my station the difference is of the order
To All from PA0SE I do like G3GVB's kind of reasoning. But I think the situation is simplified a bit too much. Assume as an example that the coil is wound on a toroid of high permeability material (e
Hello Rik and others, William tells me that the measurement of the aerial capacitance was not a very accurate one. So it is probably lower than 210 pF. The coil sits on a wooden stool of about 50 cm
To Mike and All At 15:15 2-3-05, G3XDV wrote: A useful test to see whether radiation causes the loss, would be to completely screen the loading coil. Because the size of the coil is so small, express
Thanks Jim for providing the final answer! 73, Dick, PA0SE At 19:23 2-3-05, you wrote: I do like G3GVB's kind of reasoning. But I think the situation is simplified a bit too much. Assume as an exampl
To All from PA0SE Rik is right of course. I had overlooked the fact that the voltage over the coil is almost 90 degrees out of phase with the voltage out of the transmitter. So the two voltages canno
TYo All from PA0SE I am presently writing an article for our VERON magazine Electron on the early radio experiments by Marconi. In these experiments spark gaps played an important role. Because I wou
Many thanks to all who responded to my query about the break down voltage of a spark gap. I now have more than enough info to continue my article on the early work of Marconi. 73, Dick, PA0SE
