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Syncom
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== Further reading == * {{cite web |title=Boeing. Satellite Development Center. Syncom. The world's first geosynchronous communications satellite |url=http://www.boeing.com/defense-space/space/bss/factsheets/376/syncom/syncom.html |archive-url=https://web.archive.org/web/20101111082736/http://www.boeing.com/defense-space/space/bss/factsheets/376/syncom/syncom.html |archive-date=November 11, 2010 |quote=For example, no transistor amplifiers existed, and transistors then didn't work well at frequencies above 70 MHz. We had to get up to 10 GHz. So we used a chain of diode frequency multipliers, or doublers. }}
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