How-to make homemade FM Antenna - for listening purposes
2013年4月2日 · The antenna I'm referring to is the Off-Center Fed Dipole (OCFD) described with construction details here in the RR Antenna Wiki: Homebrewed Off-Center Fed Dipole - The RadioReference Wiki Here are a few reasons you might want to …
DIY HOMEMADE DUAL BAND VHF & UHF (2 Meter & 70 …
2023年3月19日 · Bit of an Antenna freak, even as a new Ham, and wasn’t satisfied with many of the responses I’d come across the internets of, “you cannot make a dual band VHF/UHF antenna worth anything yourself, go buy some Chinese product” and/or a version consisting of less than 5 …
Homebrew DIY AM ferrite antenna, variable capacitor configuration
2021年3月20日 · This is my first DIY antenna, 120 turns of 28 AWG enameled copper wire, on a 135 x 10mm ferrite bar. The twisted antenna wires get plugged in to external AM antenna jack on stereo. Without the variable capacitor (141.6 pF yellow lead, black lead ground to copper baseboard water pipe, red lead 59.2 pF), I barely get signal.
How to build a loop antenna? | RadioReference.com Forums
2024年6月6日 · So, as per the formula (300/frequency = wavelength), if I need to build a whip antenna to receive frequency range of 525–1705 kHz, I will need a antenna of a size that can be determined by doing the math below. 525+1705 = 2230/2 = 1115 kHz = 1.11 MHz (focal point of MW range) 300/1.11 = 270 m
DIY Yagi Antenna Question - RadioReference.com Forums
2015年4月11日 · I'm getting ready to build my own 4 element yagi antenna, using the calculator on this website. 4 Element Yagi Antenna Calculator: i1wqrlinkradio.com I'm using a 5/8" dowel, and 3/32" brass rod from hobby lobby. The main reason i am building this is because the county i like to listen in uses...
Ideas for improving indoor FM reception? - RadioReference.com …
2018年2月17日 · Some FM broadcast stations use horisontal polarisation and some use vertical. If you have your antenna the wrong way it will reduce the signal a lot. I suggest you attach the antenna to a wooden broom handle or similar and try to find a place in the room and at different angles of the antenna where you get the best reception.
Add External Antenna Jack to FM Radio
2010年12月16日 · I have an FM boom box that has the telescopic antenna. I added an external antenna jack so that I can use something like a wideband scanner antenna on it. My FM radio reception in the house is not great, but I think I could do a little better by going with a magent mount scanner antenna attached to a metal filing cabinet.
how to improve antenna for portable radio?
2023年11月2日 · There are also antenna tuners, outboard preselectors, that sort of thing, that might help match the wire to the radio that only has a whip antenna. Lastly, there is the proximity effect. You can couple a small portable to a long antenna by locating the radio near the end of the wire, or the antenna feedline, without a direct connection.
DIY safe antenna wire length for clip on to portable SW receiver (C ...
2022年1月25日 · Anyhow, back to the reason for my post, I was doing a lot of research on making a DIY antenna wire, one where you have an alligator clip to clip it to the whip antenna. Seems there is a wide variety of views as to what length to make the wire so it does a good enough job at improving reception but not so long as to risk overloading the portable ...
needed fm/am radio antenna for my metal workshop
2009年1月25日 · Methinks you have the antenna terminals backward. The wire is the AM/FM antenna, that goes on the AM antenna terminal or a loop if supplied goes between the AM and ground terminals. You can also put the wire (should be a 1/4 wave 31" long) on the FM terminal closest to the ground terminal, these are your 75 ohm FM connections.