Hi all,
this week I got myself a Pintek DP-100 Differential Probe from a liquidation sale. This is a 6.5KV 100MHz diff probe. Unfortunately it was only the unit, no probes or PSU included as the liquidation company in their infinite wisdom went and sold the probes as part of a "Test-lead lot" and the PSU probably went with some other non-related bundle
Not a major problem for me, but it does mean that the teardown is only the main unit. So here goes...
First up, the outer case. It's big - 23cm (not including the BNC connector at the end) by 8.5cm (widest point). On the back there's the expected UL/IEC/EN certifications and a made in Taiwan sticker. On the front you get an on/off/attenuation selector, which feels really solid and has very defined "clunky" positions. No mistaking that you've changed the selection. Attenuation can be set to 100x, 200x, 500x or 1000x. You also get two LEDs for power and low battery. The case passes Dave's bend/squeak test. The screws have proper enbedded metal holes, not self-threaders.
Inside it's obvious that some very similar design techniques to the DP-25 were used. The upright PCB for the banana sockets are similar, however it's split in two here, the DP-25 just had one for both sockets. There's also no metal coating on the case surface as seen on the 25. The schematic is completely different, with quite a bit more on the PCB. The battery compartment has some cheap sponge inluded to stop the battery from rattling. It's cheap, but it works well.
The PCB looks well planned and designed, with the required cut-outs at the high-voltage end. The soldering quality is also top-notch. All ICs are soldered except for the 8pin DIP IC at the 9V input stage marked CPA - P136AP4 (have to check what that is). The critical capacitors are from OS-CON (Panasonic).
Not much more to say about it at the moment. I won't get to test it until tomorrow. Any questions, just ask. Enjoy the pictures...
McBryce.