I saw a unit on ebay UK described as an 'S.J.Electronics Universal Electronics System' selling on a 'buy it now' of GBP50 with free postage. The description peaked my interest and after a quick look, GBP50 was winging its way to the seller The unit is in fact a Metex combined test instrument system and these were popular a few years ago and found homes in schools, colleges and home workshops. They were not a cheap purchase at around $1000 but they offered the buyer an 'all in one' test equipment solution for the bench. Specifications were nothing amazing. You got four decent quality instruments in a single box.

The unit provides a 250MHz frequency counter, 2MHz function generator, Multimeter with Capacitance + RS232 logging capability and finally a PSU that can supply 0-30V @2A, 5V@2A, 15V @ 1A. The frequency counter also provides an accurate display of the function generator frequency if required. All this for GBP50.was it money well spent.let us see what is inside the big box Pictures attached. Its actually a very well constructed unit and performs to a decent standard.

Sep 17, 2010 - kHz, exposure time 25 µs (accumulated over 10 ms, i.e. 200 cycles); (b) stripe structure in helium, 100. Figure 2 shows the schematic diagram of observation system setup. Plasma source, which could induce electrolysis in the tissue or stimulate nerve or muscle cells. Generator (METEX MS9150). On Sale Metex MS-9150. We take purchase. And digital multimeter. Both units come complete with RS232 cable, software, BNC cable, test leads and manual.

I have not done full calibration checks but all components appear accurate to hobbyist standards at least. I liked what I saw and decided to use the unit as a relatively compact multi instrument for use in the house when I just want to do some quick checks on a piece of kit. The seller turned out to be a recycling specialist who is located only 2 miles from my home.I popped down there today and bought another two of these units for friends who like the design. I attach the similar Metex 9160 model that is the revised version with an improved frequency counter & function generator.

The schematics for the similar 9150 are also attached. So was it worth GBP50. I believe so Aurora. I've used the similar MS9160. One thing I hated was the loud AC fan, this unit appears to be fanless.

Power supply was OK, though not terribly stable. Frequency counter was not bad for its price. Amplitude of the function generator varied a lot with frequency. The manual actually hints at this. Square and triangular wave were a joke near its max frequency (though the specs claim it can do all up to 10 MHz).

Gmdss simulyator obuchayuschaya programma. I felt like they pushed the bandwidth of the function gen too far beyond the limits of the original design. I considered that it may need adjustment, but I never found instructions or a description of all the trimmers. DMM was a horrible piece of crap that would take seconds to respond (continuity test was absolutely useless) and was battery powered (too lazy to provide a proper isolated power supply?) and used a standard LCD, which defeated most of the point of a bench meter.