UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Setting up external antenna for AM and FM reception?

DennisCA · 28th Oct 2021, 6:39 am

I'm doing some of my own hamfisted research and if I understand it properly, I could use one of these to connect a long-wire antenna to coax:
https://www.winradio.com/home/lwa.htm

Then I could pick up AM signals from my coax-outlets with a receiver that is designed to work with 50 ohm impedance.

But for my phillips F5110 I'd need another transformer to turn up the impedance again to match it to the receiver? I've seen some mention of using a balun to accomplish that. I guess a balun can both lower and increase impedance depending on design.

I don't know what impedance my receiver would like to see, but I have read references to 300 ohms. I also have a 3rd 300 ohm FM antenna input, so perhaps the AM antenna would also like 300 ohms.

28th Oct 2021, 6:39 am	#8
DennisCA Tetrode Join Date: Sep 2021 Location: Vaasa, Finland. Posts: 82	Re: Setting up external antenna for AM and FM reception? I'm doing some of my own hamfisted research and if I understand it properly, I could use one of these to connect a long-wire antenna to coax: https://www.winradio.com/home/lwa.htm Then I could pick up AM signals from my coax-outlets with a receiver that is designed to work with 50 ohm impedance. But for my phillips F5110 I'd need another transformer to turn up the impedance again to match it to the receiver? I've seen some mention of using a balun to accomplish that. I guess a balun can both lower and increase impedance depending on design. I don't know what impedance my receiver would like to see, but I have read references to 300 ohms. I also have a 3rd 300 ohm FM antenna input, so perhaps the AM antenna would also like 300 ohms.