Measuring a harmonic of 25.715 MHz. All harmonics must be below 25 microwatts and 40 dB below the fundamental. TinySA internal attenuation is set to account for non-50 ohm port.
25 Watt Power Test: FM/AM & Sideband Performance #shorts
Testing the power output of this radio in FM and AM modes. FM on high power hits a surprising 25 watts, while AM peaks around 18 watts. Sideband audio also shows impressive results.
Build a Meshtastic Node with the N35v4 | Complete Heltec V4 Guide
In this video, I build the Meshnology N35v4 Meshtastic node kit, flash the latest Meshtastic firmware, pair it to the Meshtastic app, and test basic communication with another node.
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If you are wondering how to build a Meshtastic node from a kit, how to flash Meshtastic firmware, or how to get your first Meshtastic message sent between two LoRa nodes, this video walks through the full process from start to finish.
This build uses the N39 Meshtastic kit. The goal is to go from parts in a box to a working Meshtastic node that can talk to another node.
In this video:
– What comes in the N39 Meshtastic kit
– How the N39 hardware goes together
– How to flash Meshtastic firmware
– How to use the Meshtastic web flasher
– How to connect the node to the Meshtastic app
– How to pair the node with a phone
– How to send a test message
– How to confirm the node is working
– Common build and flashing issues to watch for
This is intended as a beginner-friendly Meshtastic build guide. You do not need to be a radio expert to follow along, but you should be comfortable handling small electronics, USB cables, firmware flashing tools, and basic troubleshooting.
Meshtastic works by creating a mesh network between compatible LoRa nodes. Each node can pass messages along to other nodes, extending communication beyond direct radio range when enough nodes are present. Range depends on antenna choice, terrain, height, power settings, and local RF conditions.
If your Meshtastic node will not flash, will not pair, or will not send messages, check the USB cable, serial driver, boot/reset button timing, firmware target, Bluetooth pairing state, and app settings. Most Meshtastic setup problems are small cable, driver, firmware, or pairing issues rather than a failed device.
This video is part of my Meshtastic playlist where I build, test, flash, compare, and troubleshoot different Meshtastic nodes and LoRa devices.
Meshtastic playlist:
Questions this video answers:
What is the N39 Meshtastic kit?
How do you build an N39 Meshtastic node?
How do you flash Meshtastic firmware?
How do you use the Meshtastic web flasher?
How do you pair a Meshtastic node with your phone?
How do you send your first Meshtastic message?
What do you do after flashing Meshtastic?
Why is my Meshtastic node not talking to another node?
Can a beginner build a Meshtastic node?
What is a Meshtastic LoRa node used for?
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0:00 Intro
0:27 Build
6:04 Creator Read
7:40 AIOT Dev Kit?
7:52 Flashing
11:20 First Boot & Overview
12:21 Connect Control Surface Connection
14:22 Send Messages!
15:47 Outro
Is the new air conditioner causing local interference on channel 144? Testing all the buttons, but does it actually transmit and receive? The hunt for the source of the static.
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Connect Your Radio: USB Serial Controller Setup Guide #shorts
Connecting your Retevis RT95 radio: Navigating TTY USB serial settings and selecting the correct vendor drivers for optimal performance.
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They said it was defective. Wouldn’t program. Wouldn’t talk. Wouldn’t cooperate.
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Came back in a plain brown box with a label that read like a confession and a number scrawled on the side like a case file nobody wanted to touch. Another RT95 from the returns pile. Another problem child.
So I brought it in. Put it under the lights. Asked it a few questions. At first, it clammed up. Wouldn’t take a codeplug. Wouldn’t play nice with the software. Just sat there… powered on, but stubborn. Like it knew something I didn’t.
But in this line of work, you learn a few tricks.
One factory reset later… and suddenly it was singing like a choirboy on Sunday morning. Turns out, this one wasn’t broken after all. Just needed a fresh start and someone willing to dig a little deeper than the RMA department.
Welcome to RT95 #16.
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How I Get "FREE" Amazon Returns for Videos! #shorts
Turning Amazon returns into profit requires dedication. I repair and sell these items, a process honed over 1,000 videos. It’s hard work, but rewarding.
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Testing Ham Radio Power Output: Simple Setup Guide #shorts
Found a strange device! Let’s hook up a dummy load and meter to see what power it outputs. Could this be a game-changer?
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but why does Elecrow make seven different ThinkNode models? In this video, we walk through the entire ThinkNode M-series lineup to see what each Meshtastic device is actually built to do.
From handheld Meshtastic radios and DIY development boards to tiny GPS trackers, a Meshtastic power bank, solar-powered repeater nodes, and permanent network infrastructure, the Elecrow ThinkNode lineup covers a surprisingly wide range of use cases.
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Ordered an RT95 programming cable, but received one with a Baofeng connector instead. Always double-check before packing!
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📡 Gear Featured in This Video:
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👉 Retevis RT95 (Amazon): https://go.temporarilyoffline.com/h1xxrt
👉 Dual Band Antenna (Amazon): https://go.temporarilyoffline.com/0jit1l
GEEKOM Summer Sale – Save at Least 16% on Mini PCs
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GEEKOM A5 Pro 2026 Edition
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