-
Broken B input
The B input of the PM3206 has stopped working from 50mv/div and above. Does not appear to be a loose connection. Needs further investigation
-
HP 16500B
A mainframe for HP series logic analyzers from the 1990s. Suitable for analyzing parallel data buses.
-
Line filter replacement of Rifa capacitors.
An attempt was made to replace the Rifa capacitors in the line filter used by a HP1653B. The outer casing was cut open using a dremel but revealed the inside is potted. No further attempt where made to remove the potting. Instead the filter was put together using conductive tape and put back inside the unit.
-
HP 1653B
A 32 channel logic analyzer with 25Mhz state using the dreaded HP (not IBM compatible) floppy system to boot. Although utilities like lifutil exists by far the most complicated part of maintenance is the practice of restoring boot floppies and drives.
-
HP 16500B/16501A Logic Analysis System User's Reference
User manual for the HP 16500B and 16501A logic analyzers often called Logic Analysis System (LSA) by HP. Includes general usage, system options and logic module operations.
-
Further reformation of electrolytic capacitors for the PM3410
Further reformed electrolytic capacitors, this time for the two sub-assemblies of the PM3410. No real signs of large leakage although current consumption on several capacitors was quite high. This was to be expected as they are connected across the power supply lines so essentially the current consumption was just the standby current of the sub-assembly. The capacitors showed no signs of internal heating (tested using infrared thermometer).
-
Reformed electrolytic capacitors
All electrolytic capacitors on this part have been reformed by increasing the DC voltage up to either 58 volts or 2 volts below the maximum rating of the capacitor. None of the capacitors showed unusually large leakage or tended to lose charge quickly. It is deemed unnecessary to replace any of these capacitors. However, given the large maximum voltage of most capacitors a power up cycle using a variac is still deemed necessary.
-
Complete cleaning of parts
All parts have been cleaned using a rag shirt and progress can continue with electrical inspection
-
Physically Inspection and partial cleaning
Device is disassembled into half a dozen parts to investigate the internals. Several parts of the disassembly are cleaned using a rag shirt as to not scratch or damage to soft metals. Overall the device is decent conditions as there are no visible signs of corrosion. If any corrosion in is on the top surface of trimmer resistors as is quite common in this line of Philips devices. Most electrolytic capacitors have a rubber gasket at the bottom which shows visible signs of wear. It is unclear if this wear is due to leaking, this is something that must be thoroughly investigated before power up.
-
PM5771
The Philips PM 5771 is a pulse generator operating from 1 hz to 100 Mhz with fine grained pulse shaping controls.
-
Philips dual trace storage oscilloscope PM 3251 user manual
The user manual for the analog storage functionality of the Philips PM3251 analog storage oscilloscope.
-
Philips HF Multiplikator Oszillograf PM 3252 anleitung
Introduction to the X times Y multiplication feature in the Philips PM3252 analog oscilloscope.
-
Philips HF Multiplikator und Speicheroszillograf PM 3253 anleitung
Introduction about the X times Y and analog storage functionality of the Philips PM 3253 analog storage oscilloscope.
-
PM3253
A Philips PM3250 series oscilloscope with X*Y multiplication and analog storage features. These features are denoted by incrementing the part number by one and two respectively. This is why this model is known as the PM3253. Made in the early 1970's this was a very capable oscilloscope offering a 50Mhz input bandwidth and two individual time bases. As was typical for the era, these models are entirely build using discrete transistors each and every one on their own tiny standoff post.
-
Type 453
-
PM3410
-
Hameg HM 1005
The Hameg HM1005 is a dual channel analog oscilloscope with 50Mhz bandwidth. Notable features include a delay timebase and 10x horizontal zoom. Notably, the delay timebase offset is configured using a digital circuit with LED bubble display.
-
PM3370
-
Philips PM 3250 (X) gebrauschsanleitung
German user manual for the Philips PM 3250 (X) focusing in particular on the base functionality included with the device.
-
PM3250 X
The Philips PM3250 X is a base model of the 1970's PM3250 series. This specific model has dedicated buttons for mains and video triggering which where features commonly used during television repair and maintenance. Like all PM3250 series the input bandwidth is 50Mhz and the device has two dedicated time bases. The internal construction is achieved using entirely discrete transistors each of them on a small plastic standoff.
-
PM3206
The Philips PM3206 is a 15Mhz bandwidth dual trace oscilloscope using integrated circuits (ICs). The scope features an X * Y multiplication mode as well as 5x horizontal zoom. It is not to be confused with the Philips PM3206 oscilloscope released in 1964 that instead was entirely based on vacuum tubes.
-
Philips pm3400 manuals
The user, probe and service manuals for the Philips pm3400
-
Museum overview 2023
An overview of the entire museum as present in 2023
-
Tektronix 571 Curve Tracer exterior and interior
Showcase of the Tektronix 571 Curve Tracer its exterior and interior as well as the device working
-
Philips PM6650 manual binder
Binder for the Philips PM6650 manuals. This includes user and service manuals as well as manuals for the sub units (bcd, remote control, d/a converter) and peripherals (automatic frequency converter).