Radyne ComStream Conference Call and Webcast April 28, 2004 First Quarter 2004 Financial Results and Operating Highlights PHOENIX, April 20 /PRNewswire-FirstCall/ -- Radyne ComStream Inc. (Nasdaq: RADN; Warrants: RADNW), today announced that it would be holding a conference call on Wednesday, April 28, 2004 at 2:00 p.m. Eastern time to discuss its first quarter 2004 financial results and operating highlights. The call is open to the public. The toll free dial in number is 1-877-407-9205 and the international dial in number is 201-689-8054. It will also be accessible via the Internet at http://www.radn.com/ and http://www.vcall.com/. For those unable to participate at the designated time, a replay will be available following the call at both websites, or by dialing the following phone numbers: Replay Number (Toll Free) 877-660-6853 Replay Number (International) 201-612-7415 Replay Passcodes (both required for playback) Account # 1628 Conference ID# 102625 Teleconference Replay Available Until: April 29, 2004 at 11:59PM Eastern About Radyne ComStream Radyne ComStream designs, manufactures, sells, integrates and installs products, systems and software used for the transmission and reception of data and video over satellite, microwave and cable communication networks. The company, through the Tiernan subsidiary (http://www.tiernan.com/), is a supplier of HDTV and SDTV encoding and transmission equipment. The Armer subsidiary (http://www.armercom.com/) provides innovative solutions for the integration and installation of turnkey communications systems. The company has offices in Phoenix, San Diego, Singapore, Beijing, Jakarta and London. The company also has sales and/or service centers in Rio de Janeiro, Bangalore, Shanghai and Moscow. For more information visit our web site at http://www.radn.com/. For further information, please contact Malcolm Persen, Vice President and Chief Financial Officer of Radyne ComStream, +1-602-437-9620. DATASOURCE: Radyne ComStream Inc. CONTACT: Malcolm Persen, Vice President and Chief Financial Officer of Radyne ComStream, +1-602-437-9620 Web site: http://www.armercom.com/ Web site: http://www.tiernan.com/ Web site: http://www.vcall.com/ Web site: http://www.radn.com/

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