UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Questions on 160/80 metre AM transmitters.

AdrianH · 20th Jan 2023, 5:57 pm

Hello Jon, I think the base stations were 40 to 50 watts output although this is going back years now, A mid band system that was being installed for the then North West Water.

Ian, thanks for the link, I would be more that happy to get 40dB down personally, that is what I appear to get on 1.9MHz when tuned up. It is the fundamental getting through that is my main concern when on 80m To do any Morse code I would be down near the bottom 1.75MHz which takes it out of the Amateur band and close to some coast guard stations. I am not sure how much would get out there probably very little I appreciate. 30 dB down on 6 watts output being 1/1000 at 6mW 40 dB being 200uW. is probably less than the Hash around here.

I just want to aim for the best or restrict it's use.

Adrian

20th Jan 2023, 5:57 pm	#176
AdrianH Octode Join Date: Mar 2020 Location: Blackburn with Darwen, Lancashire, UK. Posts: 1,572	Re: Questions on 160/80 metre AM transmitters. Hello Jon, I think the base stations were 40 to 50 watts output although this is going back years now, A mid band system that was being installed for the then North West Water. Ian, thanks for the link, I would be more that happy to get 40dB down personally, that is what I appear to get on 1.9MHz when tuned up. It is the fundamental getting through that is my main concern when on 80m To do any Morse code I would be down near the bottom 1.75MHz which takes it out of the Amateur band and close to some coast guard stations. I am not sure how much would get out there probably very little I appreciate. 30 dB down on 6 watts output being 1/1000 at 6mW 40 dB being 200uW. is probably less than the Hash around here. I just want to aim for the best or restrict it's use. Adrian __________________ Asking questions and learning, or trying to! Youtube EF91Valve