Re: UV-5R SOTA in high levels of RF
Paul Butzi (W7PFB)
My cousin Curt K7ZOO is pretty active with SOTA in Arizona (among his other interesting projects is a plan to do summit to summit SOTA using heliographs).toggle quoted messageShow quoted text
His experience is that he is often able to hear stations on his Yaesu handheld that cannot be heard on SOTA partner's Baofeng UV-5r. This is on summits that are in the middle of nowhere, so there are no other transmitters within miles.
Caveat: while it’s likely true that all FT-60’s perform alike, or that all Kenwood TH-F6a’s perform alike, it is most definitely not the case that all Baofeng UV-5r’s will perform alike, because of variations over time in which compromises are made for one particular batch of UV-5R radios.
An interesting article on building a bandpass filter is at https://www.arrl.org/files/file/Technology/Intermod/No_Tune_Filter.pdf
Note that both the filter described in the article and the SOTABEAMS filter have 3db of insertion loss, meaning that unless you get the filter out of your antenna feed when you transmit, the filter is eating half of the power and your 5 watt radio is effectively a 2.5W radio.
All very interesting stuff!
73, Don’t forget to smile and have fun!