Find answers to your questions about Amateur Radio or help others by answering their Amateur Radio questions.
A rather popular belief on this topic is that h-pol is superior to v-pol. Probably that is traceable to published "far-field" patterns over a lossy ground plane generated by...
Asked on 09/27/2021
1 answerFollow-up on this question: How to prevent cracking the capacitors in my diplexer? Short story: 2m/70cm diplexer, to be used up to 50W. Schematic from Elsie:...
Asked on 09/27/2021 by Dieter Vansteenwegen ON4DD
1 answerRecently, I read something about EIS (effective isotropic sensitivity) and TIS (total isotropic sensitivity). I'm trying to understand the concept, but I find it's quite hard for me. In the...
Asked on 09/27/2021 by tyrela
1 answerTeaching myself 4NEC2 and have most of it under control, which is good. Regarding radials & grounds, i've been learning the "rules" NEC(2) has, summarised below.4.1. Free space. In the...
Asked on 09/27/2021 by t252
0 answerWikipedia says:Colloquial usage of the term 'PSK31' in amateur radio usually impliesthe use of the most commonly used variant of PSK31: binary phase shiftkeying (BPSK)....
Asked on 09/27/2021 by Xunie
2 answerI am transmitting a 16khz data signal using OFDM 16-QAM x 6 carriers and the library amodem using a HackRF. However, I am having issues receiving this...
Asked on 09/27/2021 by Aiden Kaiser
0 answerDisclaimer: I'm aware of legal issues regarding EWS! Rest assured that there is no need for concern as this is a small-scale, proof of concept done in a controlled enviroment!...
Asked on 02/15/2021 by CCG
0 answerWhen a cellphone is near an electronic device with speakers and someone's calling, we may hear a sound like this due to interference: Cell Phone Interference Sound...
Asked on 02/07/2021 by mtpc1486
1 answerIn a world where common mode current is the enemy, and we're constantly doing what we can to avoid RF in the shack, why would we ever choose a voltage...
Asked on 01/22/2021
2 answerI would like to build an FM repeater using a short stack of Kenwood TK-890H rigs adjusted to 70cm USA amateur band, but the model has a 100W rating with...
Asked on 01/15/2021 by Jason W7DM
2 answerGet help from others!
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