Excellent and detailed description about quenched spark transmitter you can find in the following patents: US1216538 US1216615 US1152272 US1733454 US1717656 which can be downloaded in PDF from: <http://worldwide.espacenet.com> Good books are: Wireless Telegraphy by Zenneck translation by Seelig Wireless Telegraphy; With Special Reference to the Quenched-Spark System by Leggett also: Radio Instruments & Measurement No.74 The Elementary Principles of Wireless Telegraphy vol.1 by Bangay The Elementary Principles of Wireless Telegraphy vol.2 by Bangay which can be downloaded from: <https://archive.org/details/texts> Regards, Tuky On Fri, Nov 21, 2014 at 6:47 PM, Ralph Hartwell <sparks@xxxxxxxxxxxxxx> wrote: > Let me try that link again: > > > > http://W5JGV.com/375 Meter Spark Transmitter/index.htm > <http://W5JGV.com/375%20Meter%20Spark%20Transmitter/index.htm> > > > > > > Best DX & 73, > > > > Ralph W5JGV - WD2XSH/7 > > > > > > _______________________________________________ > Tesla mailing list > Tesla@xxxxxxxxxx > http://www.pupman.com/mailman/listinfo/tesla > _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla