about wifi channel

My home a oldest USB buffoa N client, and using TPLINK841.

if I change to channel to 11-13, the USB N client cannot search out my wifi. But the client still can detect other wifi SSID. Only my home SSID cannot detect...

when I change back my wifi channel to auto,Then it can detect my home wifif again and it will ok.


Is it mean some old client cannot access channel up to 11,12,13? thanks

Maybe,  as far as I knew, C12 and C13 are not the general standard in the spec of 2.4Ghz.

If it is wrong, please help to reply.

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