v. tSyntonize(Physics) To adjust or devise so as to emit or respond to electric oscillations of a certain wave length; to tune; specif., to put (two or more instruments or systems of wireless telegraphy) in syntony with each other.
Century Dictionary and Cyclopedia
syntonizeTo adjust to syntonism; render syntonic. See syntonism.
Webster's Revised Unabridged Dictionary
Professor Braun's syntonic system, the receiver and transmitter of which have been described, is also in one form a non-earthed system.
"Hertzian Wave Wireless Telegraphy" by John Ambrose Fleming