Is 去 (qù) pronunced /tɕʰu/ or /tɕʰy/? I'm a struggling very beginner having difficulties with both pronunciation and Pinyin.

I dabble in linguistics so I'm accustomed to dealing with IPA pronunciations. For this reason I have been looking for a table related syllables in Pinyin and IPA. I found this one on talkbang.org, which I thought was just what I was looking for.

When I found my pronunciation of 去 (qù) "go" wasn't good I found on this site that the pronunciation would be /tɕʰu/, with the "u" sound similar to the one in Engish "food".

But my native Chinese speaking friend didn't understand me and the pronunciation he demonstrated for me sounded like /tɕʰy/, where /y/ is the IPA symbol for the "ü" sound not found in English but similar to a sound found in French and German.

I know in Pinyin the spellings and sounds for "ü" and "u" are not totally obvious for new learners and I haven't got a grip on this yet.

So is the chart on this website wrong, thus being part of what's hindering my progress, or am I just not hearing or understanding things at all?
I think it is a terrible mistake that the website has made, because there is no occasion when qu is pronounced tsʰu in Mandarin. Since you can actually tell the difference between u and ü, things should be easier for you now. You can just memorise that after (pinyin) j, q, x, y, ü is always written as u, and if you see u after j, q, x, y, it's always pronounced as ü. It shouldn't cause any confusion at least to native speakers because these consonants are never followed by a vowel sound u but only by a ü.