Category Archives: Measurement tech

My collection of measurement tech

Repair/teardown – FlexiScale weight and calculator scale

I love going to the flea market – you find all sorts of fun stuff, bargains, trash and the occasional treasure that is being sold for next to nothing. This posts fits into the ‘fun stuff’ area – while at … Continue reading

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L110 METRA Blansko resistance decade box

Recently I got a L110 resistance decade box made by METRA Blansko, in former Czechoslovakia. Unfortunately something was rattling inside, so I had a quick look inside to remove the offending part – it was a small metal nut that … Continue reading

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Datentechnik MS2-TD serial data generator teardown

This gallery contains 77 photos.

While going through random electronics on a local flea-market (on the Inter Stadium in Bratislava, 98+% of the items there are of no interest, but the occasional treasure can be found, beware of pickpockets) I found this little device – … Continue reading

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HP 6010A Teardown

This gallery contains 116 photos.

The HP 6010A is a monster of a power supply, capable of providing 1kW. There are three limits: 17A, 200V and 1kW – that means that you can source 200V, but only up to 5A. You can suck 17A, but … Continue reading

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HP 3476B teardown

This gallery contains 35 photos.

The HP 3476B multimeter is a neat piece of measurement equipment – probably one of the better choices for an economical (sold at 225 USD in 1976, around 1k USD today) 3½ digit digital meter in the later 1970s. It … Continue reading

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HP3455A teardown – part 3 – The analog part and the miscellany

This gallery contains 60 photos.

The analog part is the real heart of the device – here all of the precision magic and measurement happens. If you are interested in the detailed inner workings of the system, please read the service manual, which is available … Continue reading

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HP3455A teardown – part 2 – The Logic! and the Display

This gallery contains 17 photos.

This is the second part of the teardown of the HP 3455A digital multimeter. It will deal with the logic part of the device. You can read the first part of the teardown HERE. And the last part, for the … Continue reading

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HP3455A teardown – part 1 – calibration module and the backside

This gallery contains 28 photos.

The HP3455A is a great device – Old, but great. It is a precision multimeter (voltage, resistance), made by HP in the 1980’s. For part 2 (logic and control) CLICK HERE. For part 3 (analog and black magic) CLICK HERE. … Continue reading

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Tektronix 455

My second scope was the wonderful Tektronix 455 – a great analog scope with lots of great features – about 100 times better than my first Soviet C112 scope. Reasons: I had to sell it to buy my current digital … Continue reading

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Soviet C-112 scope

The C1-112 oscilloscope: A simple soviet scope. AFAIK it is a copy of a french scope. I have the manual. The schematics part is available for download. It is very large, namely 10MB. So be careful when you decide to … Continue reading

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