Hello Tony, nice to see a message from you after long time. I remember our QSO's on 137kHz in the late 90's. Big antennas have the reputation of being poor RX antennas, maybe because they overload th
Hello Tony, a quick and dirty simulation of the 125m tower shows a radiation resistance of 1 Ohm and a capacitance of 2.5nF (what is a reactance of 460 Ohm at 137kHz). So you would need only 0.55A an
Thanks Claudio the mast is grounded via a choke. Unfortunately the inductivity is to low for 136kHz. So we have to change it. But we will be careful. 10kV is not for joking. 73 de Toni
May be that with this huge mast you can have some problem with static electricity. Athmospheric Efield, in qiet days, is about 100 V/m, so 10 kV from the top of the mast. Provide a good DC grounding
Hi Tony, We haven't had QSO before but i am looking forward with interest to your LF activity and hope to be QRV as well. I am using a 100m or 300m vertical antenna and i am QRV in regularly CW. You
Hi Toni, Thanks about the weblink. Yes, 1 W ERP can be done with a QRP TX, supplied by a 9V block battery ;-) BTW i just remembered your call from some HF QSOs i think. Do you have a digital logbook?
Hi Tony Use the same antenna for both TX/TX. This is what I do at my QTH and if works very well. On RX some control over gain would be convenient to set the optimum front end RX gain. ie an adjustabl
Good morning LF Group and many thanks dear Rick, Alan and Jim for the very interesting answers. It's a pleasure to chat again with you. Yes, the ancient times will revive for a couple of nights! We w
Hi Mal Thank you for the response. So I will take my attenuator box to the site, connect the mast to the RX and see what happens. It will be difficult to get a receiving antenna far away enough, and
Hi Toni, Thanks about the weblink. Yes, 1 W ERP can be done with a QRP TX, supplied by a 9V block battery ;-) BTW i just remembered your call from some HF QSOs i think. Do you have a digital logbook
Hi Tony, We haven't had QSO before but i am looking forward with interest to your LF activity and hope to be QRV as well. I am using a 100m or 300m vertical antenna and i am QRV in regularly CW. You
Dear Toni, LF Group, It will be difficult to get a receiving antenna far away enough...> Unlike Mal, I have used seperate RX antennas for several years on 136k, due to local QRM picked up by the TX a
Dear Toni, LF Group, You may find that the big mast works well as a receiving antenna, if it is well seperated from sources of QRM from mains power etc. When using the 100m mast at the Puckeridge ex-
Hi Toni this is like the old days :-)) nice to have a chance to chat again. My thought is how far could you get say a loop away from the vertical?? if it must be quite close you will need to detune t
