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Download software hameg hm 303 service manual mod#a beast! NOS from MOD when I got and I used it for about 10 years, dates from about 1970, huge, heavy and has every facility you could possibly desire. If I ever make a bulk purchase of round tuits I'd like to sort out my ancient Cossor CDU150 scope. I have the digital storage version of the 20MHz Hameg and another for spares but I've probably only used it for half an hour in ten years! More than enough bandwidth for anything you are likely to do there and it looks a minter. Lucky it survived the inept courier there. Quite a few of the YouTube retro computer community seem to use the same or very similar models so it should do everything I would ever need and more.Ĭlick to expand.Those are negatives! One of my Teks is from their last CRT range and weighs nowt, has SMPS etc. Its a nice simple scope too, so I already know what the various functions do (I use a scope at the museum on the SSEM so do have a little knowledge already). I’m sure I’ve overpaid somewhat as some folk seem able to land lovely scopes for £50 or even find them in skips, but it looks in stunning condition, isn’t too old (Dec 03), and it clearly works. ![]() I’m hoping to learn to use the scope to better understand amplifier bias, distortion etc, help fault-find old 8 bit computers etc (check I/O to various chip legs etc). I’ve absolutely no interest in designing or modifying anything, so really all I want to build up to is to be able to service existing well documented stuff a little better. I know what a resistor, capacitor, transformer, diode or whatever does in theory, but beyond that I struggle to get more than a general gist from a circuit diagram. The thing I don’t have is any actual electronics knowledge. ![]() I’ve not tried any surface mount stuff yet, but I’m fine with pretty much everything else. I learned which end to hold way back when I started playing in bands as a teenager as cheap jack leads kept breaking etc, so I have just slowly built up from there. I’ve swapped some chips on my BBC B and you would never be able to spot my work from the factory. Send customer support a nice email and all should be well.Click to expand.I’ve actually been doing that so long now I’m very neat, e.g. The earlier HM2xx series are built like outside toilets and seem to last forever. Sadly the HM3xx series CRO's do not have the greatest reputation for long term reliability but most faults are simple to repair. Download software hameg hm 303 service manual manual#I would not expect the service manual for the latest models to be available to the public. As the HM3xx series is quite old there isn't really an issue with providing the service data. Whenever I buy a piece of Hameg equipment I always contact Hameg Customer Support and ask for the service manual (I did this with my HM305 which is similar to your unit) Hameg have always sent me the full service manual by return email. Download software hameg hm 303 service manual manuals#Hameg used to provide the schematic at the rear of their user manuals but that stopped for reasons not known to me, but could be due to the R&S take over. I used to sell Hameg equipment.a high class firm to deal with. You own an oscilloscope from a manufacturer who is actually willing to provide service manuals free of charge by email. Setting up the circuit will be in the service manual so you do need it. The type is a common cermet and nothing special at all. You can measure the trimpots across the carbon track to find out the value. ![]()
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