Thak you very much for this video. I had my PM5132 laying around with exactly the same problem. I was opening&closing the solder bridges back and forth but could not get rid of the noise. I thought one day I will remove caps one by one and check for bad ones. Following your video I did an overkill by changing all elecrolytic caps - problem dissapeared. Later I measured ESR: 543+544 were ok,506+529+530 went from 5Ohm to 28Ohm ESR, 545+546 went from 6 to 20Ohm, 547+548+511+512 went to 200Ohms. My PCB is not so discolored because of temperature so I concluded mine should have much less hours. Visual design of Philips hardware is very appealing so I am quite happy having "new" device for years to come.
Nice, never owned a Phillips brand. One thing I see void is no modulation....when I started out in electronics I used mine as a sig-gen to calibrate AM radios! :) ~Jack, VEG
That’s a beautiful generator. Sweep is by injecting a current into a capacitor, then there’s a FET buffer. Sweep stop disconnects the capacitor from the current source. As long as the capacitor is not leaky and the FET stage is good, it will stay at the same voltage for a while. It does drift very visibly if you connect it to a digital voltmeter, but it’s of no big consequence in practice. The drift can be very low and there are tricks to compensate for it.
Recommending Kontakt 61 (generally assumed to corrode stuff if not washed out) without explaining the difference in usage to Kontakt 600 (well known to make stuff smell of cheap hairspray if not washed out, but is at least supposed to not corrode stuff) might be a disservice to some viewers and their projects.... No disrespect intended!
if you ask 10 engineers about how to clean contacts, you get 10 different stories, some even directly claim what others do is directly wrong, every one can do what they like, I only got 40 years experiance , i use both kontact 60, WL, 61 and the best all in one product is simply 61
@@TeardownOZ2CPU I owe you an apology. I confused 61 for 60, and was kind of shocked about the idea of injecting Kontakt 60 into switches and leaving it there...
@@splitprissm9339 you are welcome, i also got kontact 60 and the cleaning spray but i always apply a final layer of kontact 61, i tried all sprays there is, and i must say if i can only own one spray, it will be contact 61
Amazing, I had one of these back in the late 90's and so happy to see that someone still appreciates them today.
Thak you very much for this video. I had my PM5132 laying around with exactly the same problem. I was opening&closing the solder bridges back and forth but could not get rid of the noise. I thought one day I will remove caps one by one and check for bad ones. Following your video I did an overkill by changing all elecrolytic caps - problem dissapeared. Later I measured ESR: 543+544 were ok,506+529+530 went from 5Ohm to 28Ohm ESR, 545+546 went from 6 to 20Ohm, 547+548+511+512 went to 200Ohms. My PCB is not so discolored because of temperature so I concluded mine should have much less hours. Visual design of Philips hardware is very appealing so I am quite happy having "new" device for years to come.
Nice, never owned a Phillips brand. One thing I see void is no modulation....when I started out in electronics I used mine as a sig-gen to calibrate AM radios! :) ~Jack, VEG
I am amazed by the steady stream of vintage equipment you are working on. Nice stuff. Models I don't see on ebay in the US.
thanks a lot, i think we can thank all my many nice and friendly sponsors for all the cool equipment.
That’s a beautiful generator. Sweep is by injecting a current into a capacitor, then there’s a FET buffer. Sweep stop disconnects the capacitor from the current source. As long as the capacitor is not leaky and the FET stage is good, it will stay at the same voltage for a while. It does drift very visibly if you connect it to a digital voltmeter, but it’s of no big consequence in practice. The drift can be very low and there are tricks to compensate for it.
I have one of these and the schematics. That is nice about philips, schematics.
Recommending Kontakt 61 (generally assumed to corrode stuff if not washed out) without explaining the difference in usage to Kontakt 600 (well known to make stuff smell of cheap hairspray if not washed out, but is at least supposed to not corrode stuff) might be a disservice to some viewers and their projects.... No disrespect intended!
if you ask 10 engineers about how to clean contacts, you get 10 different stories, some even directly claim what others do is directly wrong, every one can do what they like, I only got 40 years experiance , i use both kontact 60, WL, 61 and the best all in one product is simply 61
@@TeardownOZ2CPU I owe you an apology. I confused 61 for 60, and was kind of shocked about the idea of injecting Kontakt 60 into switches and leaving it there...
@@splitprissm9339 you are welcome, i also got kontact 60 and the cleaning spray but i always apply a final layer of kontact 61, i tried all sprays there is, and i must say if i can only own one spray, it will be contact 61