Yes, there's an audio section
HERE and plenty of members all over the world who are willing to offer support. There's a lot of love for these early machines.
In fact, the first thread you come to in the tape section today is about this very machine!
Regarding the noise, if it's a hissing type of sound then it's quite likely to be a resistor or an a/f driver going soft, the audio is all Germanium on these and that driver (0C81D probably, though it's not a fussy circuit) is cheap and easily available.
An original machine of that age would almost certainly benefit from a change of any Hunts caps, wax caps and electrolytics, especially if the electrolytics are Plessey ones in the red and black PVC cases. In a Philips machine you would also be likely to find pitch caps which can go off but aren't as unreliable as waxed ones. Bad caps in a/f stages tend to cause distortion and/or random hash rather than the hiss you'd get with resistors that had gone awry.