Leaking from the threaded fittings

[spader]

A newly installed ballcock valve with 3/4" threaded fitting is connected to a 90 degree female elbow connector.
Put usual 3-4 turns of PTE tape on the ballcock thread fitting part and the paste around as well, and tightened up. It has been tightened to the point, where ALMOST it doesn't go any further tightening.
But when the water is going through, there is drops of water leaking from the bottom of the joint between the threaded male end of the ballcock valve, and the 90 degree female threaded elbow connector.

What would be the best option to fix the leakage? I was thinking a few options here.

1. Give another turn of tightening (But it is already tightened NEAR enough I feel.)
2. Take out the ballcock valve, clean up the thread, and rewind PTE tape with paste, and refit. (This is what has been done. Is there a point for this try?)
3. Can it be the faulty ballcock valve or the 90 degree female threaded elbow connector? (Replace them with new ones?)

Thanks in advance.

 

[denso13]

Try 2 but you'll need a lot more than 3 or 4 turns of PTFE. I put about 15 on radiator valves.

 

[spader]

There is no leak from the compression fitting end to the copper pipe of the 90 degree elbow.

 

[spader]

Try 2 but you'll need a lot more than 3 or 4 turns of PTFE. I put about 15 on radiator valves.

It seems to have pushed out the PTE into the outside of the joint even with 3-4 turns.

 

[spader]

Try 2 but you'll need a lot more than 3 or 4 turns of PTFE. I put about 15 on radiator valves.

Photo added.

 

[trojanhawrs]

Put another turn on it