PM3230 Oscilloscope

I have bought this little scope for about 20 euro's. Its a nice little dual beam scope with a bandpass of 10Mhz, mostly transistorised except for the input amplifiers and the deflection circuits.
When i got the scope it was a little bit dirty on the inside. After a good brushing with a paintbrush and sucking the dust up with a vacuum cleaner it was time to fix the problems:

Triggering is not very good.
Channel 2 signal is distorted, need to circuit trace that part.
Problems with calibration and trace width.

Most of the transistors are of the AF118 type, difficult to get these days, but they are replacable by BF450 transistors, but still need a source for them. There is a nice explanation how to replace the AF1XX series by the BF450 transistors, or how to repair the transistors themselves.

Pictures coming up soon.

When i got this oscilloscope it had a manual, unfortunatly it was the manual for the version with FET input amplifiers and a different PSU. I am willing to trade my copy for one with the tube input amplifier. I made a PDF of the manual, you can download it at BAMA the philips section.

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Last update at: 24-07-2005