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- Telegraph_sounder abstract "A telegraph sounder is a device which produces an audible sound when connected to an operating electrical telegraph. It is similar in form to a relay. When current flows through an electromagnet, the resulting magnetic field attracts an armature that is held up by a weight. When the current is switched on, the arm is pulled down to the electromagnet, resulting in a "click" When the current ends, the weight pulls the armature back to its resting position, resulting in a "clack." Thus, as the Telegraph key makes and breaks a contact, the sounder echoes the up and down state of the key. It is important that a sounder makes a sound both when the circuit is broken and when it is restored. This eases the process of identifying long and short presses of the key to send characters in morse code. It is important that one does not confuse this with CW.The default condition of the telegraph circuit is with electricity flowing. This enables the operator to easily detect a fault in the wire.".
- Telegraph_sounder thumbnail Telegraph_Sounder.JPG?width=300.
- Telegraph_sounder wikiPageExternalLink www.morsetelegraphclub.org.
- Telegraph_sounder wikiPageID "417573".
- Telegraph_sounder wikiPageRevisionID "521751326".
- Telegraph_sounder hasPhotoCollection Telegraph_sounder.
- Telegraph_sounder subject Category:Telegraphy.
- Telegraph_sounder comment "A telegraph sounder is a device which produces an audible sound when connected to an operating electrical telegraph. It is similar in form to a relay. When current flows through an electromagnet, the resulting magnetic field attracts an armature that is held up by a weight.".
- Telegraph_sounder label "Telegraph sounder".
- Telegraph_sounder sameAs m.025yjf.
- Telegraph_sounder sameAs Q7696262.
- Telegraph_sounder sameAs Q7696262.
- Telegraph_sounder wasDerivedFrom Telegraph_sounder?oldid=521751326.
- Telegraph_sounder depiction Telegraph_Sounder.JPG.
- Telegraph_sounder isPrimaryTopicOf Telegraph_sounder.