Message:18509 In: ALL.WW
From: LU9DCEDate: Mon, 09 Mar 26 16:01:00 Z
Newsgroups: ALL.WW
Subject: ELECTRONICS FACTS 09-MAR
Message-ID: <8832_LU9DCE>
Path: GB7RJJ|GB7YEW|LU9DCE
R:260309/1601Z 9523@GB7RJJ.#79.GBR.EURO LinBPQ6.0.25
R:260309/1601Z 15247@GB7YEW.#79.GBR.EURO LinBPQ6.0.24
R:260309/1601Z 8832@LU9DCE.TOR.BA.ARG.SOAM LinBPQ6.0.25
__ _ _ ___ ____ ___ ____ ____ ____ ____
( ) / )( \/ _ \( \ / __)( __) ( _ \( _ \/ ___)
/ (_/\) \/ (\__ )) D (( (__ ) _) ) _ ( ) _ (\___ \
\____/\____/(___/(____/ \___)(____) (____/(____/(____/
PACKET RADIO STATION - BUENOS AIRES (GF05OM)
PYTHON SCHEDULED NEWSLETTERS (PSN)
COPYRIGHT 2026 - EDUARDO A. CASTILLO
+----------------------------------------------------------------------------+
CERAMIC CAPACITORS CAN PRODUCE AUDIBLE SOUND. DUE TO THE PIEZOELECTRIC
PROPERTIES OF THE CERAMIC DIELECTRIC MATERIAL, THESE COMPONENTS
PHYSICALLY VIBRATE WHEN SUBJECTED TO RAPIDLY CHANGING VOLTAGES, SUCH
AS THOSE FOUND IN SWITCHING POWER SUPPLIES. THIS VIBRATION GENERATES
ACOUSTIC NOISE IN THE HUMAN HEARING RANGE, TYPICALLY BETWEEN 20 HZ AND
20 KHZ, WHICH IS WHY YOU SOMETIMES HEAR A HIGH-PITCHED WHINE OR
SINGING SOUND COMING FROM ELECTRONIC DEVICES LIKE PHONE CHARGERS OR
COMPUTER POWER SUPPLIES WHEN THEY ARE UNDER LOAD.
+----------------------------------------------------------------------------+
PYTHON PREPROCESSOR - DEVELOPED BY LU9DCE - VERSION 1.1
Return To Bulletin List