You may need to retune your TV tomorrow in order to pick up the new 9HD channel.. Tomorrow morning from 5.00am Nine will begin simulcasting in high definition (HD) on 9HD, located on Channel 90. If you don’t have HD it will still be simulcast on Ch 91 in standard definition. 90 – 9HD 91 – Channel 9 92 – 9Gem 93 – 9Go! 94 – 9Life 95 – Extra Nine has supplied further information for viewers: HD gives you exceptionally clear, crisp pictures with vivid colours and double the