Just received a C64c from an ebay seller and I noticed it has l-h switch on the rf modulator. This is the first machine (c64c) that i have owned with a switch is this unusual?
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Channel selector. L or H. In the USA it is Channel 3 (L) or Channel 4 (H). Since different countries may use other channels or in the future the channels may differ, they won't have to change the case.
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I think that switch was for NTSC USA channel 3 or 4 selection.
There was a possibility that if a strong tv station broadcast on one channel, you could simply switch to the other channel that had no issues with a nearby tv station.
i dont think it matters much anymore.

The model I have is a pal unit, I own about ten others and none have the switch. The pcb is very good looking to!
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I've had a pal c64 with this switch. It changes it from ch37 to ch39 if memory serves to shift it away from the channel video recorders and analogue set top boxes use.
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My Commies have always had switches, always knew they were to choose between channel 3 and 4 whichever had the least interference. Atari 2600 and Pong were the same way, never noticed it changed to a l-h switch in the 64c but we've always called them channel switches.

Lite
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