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hi guys i'm new to the forum, i don't know i chose the right section. Then I have to transmit the modulated audio signal in AM, without other modulation like SSB or DBB because these are more difficult to demodulate. So my first signal is modulated in AM, then I have to send a second wave that has the same direction and direction as the first signal only more shifted downwards, and therefore through the phenomenon of beating, when the two waves affect the receiver the half waves negative signals of the first signal will be eliminated and a pulsed current will be conducted. But now tell me how I can do this, and if there is any danger that the carrier will be suppressed

Hi All, My previous employer had a HAM radio in one of their buildings and I had no clue what it was. I then recently have been given a couple HAM handheld radios from family for emergency use. Before I was given the HAM radios I had been somewhat interested in getting a CB radio and started researching. After seeing HAM radio pop up in these searches I decided to look into that and I have ended up here. I am from San Diego, CA and my hobbies include lifting weights and smoking food as well as spending time with my family. Some questions I have: 1. What is a good study guide for FCC licensing (I have 0 background in this kind of stuff)? 2. Some literature on protocol (channel use, language etc.)? 3. Anything you experienced folks think will help me out?

I am interested in building a cross-band repeater deployed on a tethered weather balloon for emergency situations where local repeaters may be overwhelmed or non-functioning due to power loss. I plan to install the whole setup in the back of a pickup truck with the tether on a large motor-driven spool. I want to be able to deploy it in a moments notice. My question is this: Does anyone here know, assuming it is never in the air for more than a few hours per deployment, how many times the balloon will be reusable? Do they wear out fast or will I be able to reel it back in and use it a hundred times? 75 bucks is a lot of money if I will wear it out the first few times I test it. All attempts to find this answer online show results pertaining to how long balloons hold their gas ~ which I am not concerned with. I need to know how many times they can be reliably filled up before wearing out and tearing. Thanks!

Hi Everyone! I hope everyone is doing well. Thought I would introduce myself here. I've been out of the hobby for years now so I have a lot of relearning and catching up to do. I'll try not to ask to many dumb questions ;) . I have my extra class license so I have a lot to get caught back up on before I start transmitting again. I just ordered elecraft px3 so I'm excited for that. Need to buy or get components to make a window pass through to connect radio to antenna. Need to figure out what antenna to use (it broke but I was using a par end fedz trail antenna out my second floor window tied off to a telephone pole (under the telephone wire). Not sure if I'll do another end fed antenna or see if wife will let me do a dipole or even using binding posts for a random length antenna and counterpoise.

Hello everyone, I've been out of the hobby for a while and decided to get back into it. I have a ton of reading to do to get caught back up knowledge wise. I'm looking for a amplifier for my elecraft kx3 radio. I don't have the uhf vhf add on but I do have all the filters and ATU. If I remember correctly the built in ATU can handle up to 20 watts of power. I'd like to be able to operate on all bands from 10-160 but realistically I think I mostly hung out on 20 and 40 meters. I do have soldering iron somewhere and not opposed to a kit as long as it's not overly complicated. If it matters I also operate phone but looking into learning CW. I hope to be around and ask other questions as well. Like I said it's been a while and I don't want to just get on the air and break all the rules or cause interference. Thanks!