Here’s how to tune it:
Tuning a pre-SCART console/computer
# Use a cartridge that you know works and make sure your console is switched on.
# Make sure your RF co-axial aerial cable is connected to both the console and TV.
# If the RF cable has a built in switch box make sure it is switched to ‘'''game'''‘ (or equivalent)
# Make sure your TV is set to '''analogue mode''' (consult your TV instruction manual if not sure how to achieve this)
# Pick a channel (nowadays most people are watching digital channels so just pick any)
# If it gives you the option to manually input a signal channel choose '''Ch. 36.'''
# If you can’t, try an '''auto tune.'''
# If this hasn’t worked and your TV will let you, try '''manually tuning''' the signal.
# If that doesn’t work buy a Commodore Pet and play old games on that. (last resort)
# On your Atari there is a switch that says channel 3 or 4. Put it on ch. 3 and put your Atari switch to ch. 3.
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It could possibly be a bad switch box. Might want to test it with another system of some kind and make sure it is in working order. Also, make sure that you are using one of the manual setting switch boxes: the old kind with the "TV / Game" selector. Auto switch boxes sometimes don't want to work that well with older game consoles.[br]
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Anyways, if you are getting a signal, but it isn't that good, there's a nice place to start. Might not hurt to try another video cable too. In any case, good luck.
# hope this helped.