03:18

AM Modulation (Reforming Wikipedia-J)

05:15

FM transmitter OSC modified to type "Colpitts"

02:09

FM transmitter, type traditional popular 1970

02:02

FM transmitter, type "Variable capacitor" frequency control

02:14

FM Transmitter and FM Radio (Ratio detector) by LTspice simulation

02:44

GAWANT antenna works like this , maybe

02:16

How a Balun and a Dipole antenna work on 50MHz

03:56

SSB Generator by Digital PSN method (English) 2024 06/21, 2024

04:06

SSB Generator by Digital PSN (日本語) 06/21,2024

14:15

Hentenna, Swiss Quad, 3Ele Quad calculation and simulation by MMANA

03:13

4G (/5G) 無線インターネット通信試験 No.01, 4G/5G EM Wave communication speed test.

03:32

How to generate SSB by a DSP signal processing of PSN method, 2024

02:32

How a Balun and a Dipole for 50MHz work (New Theory)

06:59

Strange polygons on a feeder / coaxial cable (New foundation)

06:49

Inverted V Dipole 7MHz analysis by the Smith Chart Tool app

04:35

Inverted V Dipole 7MHz analysis by MMANA app

06:27

Alternative analysis of a dipole 7MHz used "distributed complex impedance"

02:21

Calculating the impedance of series RLC circuit

04:52

Windom antenna 3.5, 21MHz 〜 50MHz / 200ohm feeding point from 75 ohm feeder

02:54

Upper limit of the impedance created by Q matching (used 50 ohm feeder/coaxial cable)

03:20

Why VSWR is measured as the changed values depending on the length of coaxial cable ?

06:59

Designing Yagi/Uda antenna / Dipole x2 Stacked Model on Smith-chart for 435MHz

03:55

HB9CV x2 stacked antenna after Adjustment

04:08

Series Tunning and Parallel Tunning Characteristics created by coaxial cables

04:49

HB9CV x2 / stacked antenna before Adjustment

04:16

Calculating impedance where connected point of two coaxial cables for two stacked Yagi/Uda antenna

08:38

Watching "Q matching" for some antennas on Smith-chart

01:36

An example of Dipole antenna (7MHz, inverted V type)

06:27

How To Use ONLINE SMITH CHART TOOL, Example 01, Preview Ver.

01:16

Matching impedance/Step Up circuit 5 ohm to 50 ohm on 1.250GHz

01:30

高周波抵抗成分75Ωアンテナ: 同軸ケーブル長によるVSWRとインピーダンス変化の計算

00:30

6月28日 雷と雲の記録/ A record of thunder's clouds near Tokyo on Jun 28, 2023

01:30

FFT処理: 電信音をノイズから数値で分離/FFT extracts very weak Morse signal among white noise

00:36

Calculation : Impedance of LC parallel circuit / 並列共振回路のインピーダンス計算

01:13

おばけのQちゃん 絵描き歌 書いてみた。

09:26

広帯域バランの動作原理の計算実験: 高周波送信波のバランス特性計算の一例

01:00

２次方程式 こんな問題は誰にも解けない ? ! 🤔[高校数I]

00:38

Test to decode a SSTV color image of "robot36" mode on Dec.11, 2022

09:35

[高校数学I] 条件付き確率”ぱぱっとわかる問題”, 2021 / Math I, Probability under some condition

02:01

ビート音が出ない不思議な現象/10khz and 15khz stored on two tracks

03:06

Analog TV/NTSC Reception Test UHF 49ch To 61ch archives

03:54

みんなの科学(1975): バケツ鉱石ラジオの改良設計

03:51

Drawing phase change of RLC circuits , Chua's Oscillator, Wien bridge Oscillator.

01:19

Visualizing FT8 signal voltage very slowly / 160mS to 1Sec. / How FT8 data is encoded in a paket.

01:16

OK Hal, Do you read me ?/CW (Morse code) communication test of weak signal under noise level.

01:52

Sun's activity is getting very cheerful from May 15 to Jun 11, 2022 (NASA/SDO)

02:11

Radio communication between a space ship and a satellite.

05:53

あゆみ姫の宇宙旅行・浦島効果/Ayumihime's space trip with SRT. Outcome of Time

12:05

AFSK 1200BPS Program Transfer experiment in March 1983 (English)

00:24

desmos:中学,高校生向け数学グラフ描画ソフト：簡単な実行例/ An easy example of Cloud App "desmos" how to draw graphs

08:56

AFSK 1200BPSプログラム伝送実験結果と考察 / AFSK1200BPS ProgramTransfer Test

04:01

[中学,高校物理] 聞こえにくい低周波のビート現象の実験 / Beat phenomenon between dual tones from 10KHz to 20KHz with 15KHz

02:01

FT8標準調整信号・各種ノイズのFFT解析・周波数スペクトラム表示 / FT8 standard tones and some noise for audio adjustment

08:02

速度の足し算の不思議(教育用引用動画クリップ)　教育用途の限定公開

01:21

"ドミソ"の和音が濁る/汚い音になるのは、なぜですか？/ Why my Do,Mi,Sol" distorted?

02:27

Chromebookでドレミの音を発生させるテスト/Generating single tones of "do, re, mi ... do" on Chromebook

02:48

AM放送局 短波31m band, 短波帯 31mバンド感度良好です。

03:17

Receiving FT8 on 14MHz by WebSDR on Feb. 12, 2022 / used Chromebook. Test tone signals for FFT.

02:04

[反例] 逆FFT変換でオリジナル信号が復元できるの？[ETV基礎物理の実験デモの引用]

02:10

The illusion of Momose / My impression of the movie "Momose kocchiwo muite" (Japanese movie)