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7 RCA has announced that new image orthicons using 750 line “Micro-Mesh** screens, replacing current tubes with 500 lines, are now in quantity production. Improved quality is possible with the new tubes, since the 750 line mesh is said to eliminate all traces of bothersome moire patterns. The grid is so fine the mesh openings comprise more than 60% of screen area. Two types are available — 5820 for monochrome and 6474 for color cameras. ******* DuMont has been putting on a “Price-Buster” sales campaign with some excellent buys on television equipment. We hope some of our stations have been able to take advantage of these price reduc¬ tions of equipment listed in the circular postmarked June 2 6. Ken Petersen has been following up this opening blast with some very clever post cards to those on his mailing list. ******* Speaking of mailing lists, many manufacturers of equipment and components publish helpful technical pamphlets and will be glad to have your name on their mailing list. We can't hope to list them all, but here are a few: General Radio EXPERIMENTER, monthly SOUND TALK - Minnesota Mining and Manufacturing Co., periodical BROADCAST NEWS - RCA Manufacturing Co., bi-monthly AUDIO RECORD - Audio Devices, Inc., periodical H-P JOURNAL - Hewlett Packard Co., monthly THE NOTEBOOK - Boonton Radio Corp., quarterly MAGNETIC MUSE - American Electronics, Inc., periodical THE CAPACITOR - Cornell Dubilier Electric Corp., monthly HIGHLIGHTS - General Precision Laboratory, bi-monthly DU MONT DISPATCH - Allen B. Du Mont Laboratories, monthly r ********