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1970s
Table
| Callsign | Channel | Market | Network | Owner | Studio location | Transmitter location | NAB seal? |
|---|---|---|---|---|---|---|---|
| KHJ-TV | 9 | Los Angeles, CA | Ind | RKO General | 5515 Melrose Avenue, Hollywood, CA | Mount Wilson, CA | No |
| KNBC-TV | 4 | Los Angeles, CA | NBC | O&O | Yes | ||
| KTLA | 5 | Los Angeles, CA | Ind | Golden West Broadcasters | 5800 Sunset Boulevard, Hollywood, CA | "Mount Alta, the highest point on Mount Wilson" | No |
| WXXI-TV | 21 | Rochester, NY | PBS | Rochester Area Educational Television Association, Inc. | 410 Alexander Street, Rochester, NY | Pinnacle Hill, Brighton, NY | — |