I've been working on two Philips models with similar chassis. Model 510A belongs to me and model 525A to a fellow Juvenal. It's been a challenge since both have antenna coil in bad condition. They are working great now that I solved the coil problem with a simple hot gun to melt a little bit the wax and some resoldering. It worked, the clean sound came out great. Philips models 510A, 522A, 523A, 524A e 525A have this same coil, which has 4 sections: 90 and 30 ohms interconnected; and 4,5 and 40 ohms interconnected.



Philips 510A, 1935, Netherlands


Philips 525A, 1935, Netherlands