I am trying to remove an IC from my PDP 11/24 CPU, a DS8641. I am really struggling to desolder it. I am using the technique of applying fresh solder and then removing it. But after multiple cycles of this I think I am starting to damage the PCB.
I am using a fairly cheap desoldering station (this one https://cpc.farnell.com/duratool/d00672/desoldering-station-uk-eu-plug/dp/SD 01384?st=duratool%20desoldering). Its spec in terms of vacuum pressure is equivalent to that of the professional Hakko ones though. I am also trying a hand desoldering pump. None of these are able to clear many of the holes of solder, although some are doing better than others. Nevertheless, the IC remains stubbornly unmoving. Are there any tips for removing ICs? Thanks Rob