How to build a HF Rain Gutter Antenna (HOA Antenna)
2022年12月11日 · A nice dip on an analyzer doesn't say an antenna is efficient. I once built a tuning reference for an antenna production line. The reference was a 51-Ohm resistor in series with a mica capacitor and an inductor. It was tweaked to dip at the center of a ham band, and it was enclosed in a solid brass box with soldered seams.
Ham Radio - Do antenna tuners help with shortwave listening?
2021年12月20日 · W1YW Ham Member QRZ Page. There are situations where the use of an antenna tuner will improve reception and discernment of the desired “signal” above noise, and situations where it will not, and the reasons for this are complex and multi-factorial. Inordinate theoretical focus on any one or two factors often fails to account for the ...
Ham Radio - The Chameleon Antennas power compensator for …
2019年11月3日 · PA0MHS Ham Member QRZ Page. You should check the bandwidth of the loop antenna at a set frequency, with and without this device. This lump of dielectrical material at the "hot" end of the loop will probably lower the Q of the loop and thus lower the peak voltage across the tuning capacitor. This thing is nothing more than a high voltage ...
Ham Radio - Do antenna tuners help with shortwave listening?
2021年12月20日 · Yes. I have used a low power (cheap) antenna tuner to dramatically reduce the amount of images that are heard on 1960s portable solid state multi-band shortwave receivers, whose front end design often fails to reject intermod and other signals that are far from the frequency being monitored. WA3VJB, Dec 20, 2021. #12.
Best HF Multiband Vertical Antenna? - QRZ Forums
2021年7月5日 · K0UO Platinum Subscriber Platinum Subscriber QRZ Page. The Best HF Vertica l. I have a Vertical polarized Rhombic Optimize for 40 meters and above, mounted at 170 feet. It also works on 160 and 80. 73 from, The K0UO " Rhombic …
The BEST Multiband HF Antenna for Limited Spaces! - QRZ Forums
2021年10月28日 · I've not had the room for a full size HF antenna such as a dipole, or even a G5RV. So I got myself a DX Commander All Band Vertical from Callum - the DX Commander and WOW! This antenna is so simple and allows me to operate on EVERY HF band using only a small footprint in my yard as I don't have room for a dipole, even a EFHW. VK7HH, Oct 28, 2021.
1 Watt SSB POTA with the N9SAB OCFD antenna - QRZ Forums
2023年9月1日 · N2MAK XML Subscriber QRZ Page. Almost anything is possible in ham radio with a little patience, some elevation and a great antenna. Here's what it was like trying the "1 Watt SBB, 1 Hour Challenge" for a Parks on the Air (POTA) activation using the N9SAB 40-6m off-center-fed dipole antenna. N2MAK, Sep 1, 2023.
Video: DIY Ultra-portable Mast for Wire Antennas | QRZ Forums
2023年7月16日 · When on a summit, whether it's 1000' in elevation or 10,000' in elevation, mast height is a little less important. I've even used a wire on the snow to get plenty of QSOs. The steps demonstrated here can be used to build a 10' mast or 26' mast. This small mast will be used for trail running and cycling based portable activations.
HR2.0 - Ham Radio Antennas | Base Station Antennas - What Do …
2020年9月4日 · And I suspect it adds up to a fairly substantial sum. Play with the math. Let's assume just for a moment 35,000 subscribers pay $30. That would yield more than a million bucks, and that does not include advertising dollars from GoogleAds and ham radio vendors, and other fees - pretty soon it adds up to serious folding money.
Ham Radio - An end fed folded dipole experiment. Part 1, the idea …
2019年7月7日 · The whole idea of the folded dipole is that the center can be series fed with typical balanced line that has a higher Z0 (300-600 Ohm) - hence a more appropriate feed point Z for balanced line. See "cage dipole" in Orr's Radio Handbook or …