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[Kevin Wood]

I think the 465 was probably about the best scope they made. I have a 2236 which works nicely but a sod to work on and clearly built to a price, which none of the earlier 'scopes seemed to. People say good things about the 2465 but I haven't played with one recently.

I have 3 7000 series at the moment. a 7904, 7603 and 7623. Would love to come across a spec ana plugin but they seem quite rare.

I agree that digital 'scopes don't "feel right" in comparison to analogue scopes. The slightest flicker of an analogue 'scope tells you something, which you'll probably miss with a digital scope. However, it's mainly down to user interface and a slightly different approach being required to use them, IMHO. A load of menus to wade through doesn't seem to be a match for a couple of switches on the front panel.

The better digital scopes do work very nicely and don't mislead because they use plenty fast sample rates, but if you're not working on stuff that needs to be ruthlessly fast and you don't need storage, you're still better off with an analogue scope IMHO. I think the mistake Tek made was dropping the analogue scopes from the bottom end of the range because their low end digital scopes are nasty.

Kevin

[Marks DTM Calib]

Its the introduction of bloody windows on scopes thats the worst bit.......its like an anxiety detector, it crashes or goes into screen saver mode just when you need all your hands to hold probes and trigger events....

[Kevin Wood]

Its the introduction of bloody windows on scopes thats the worst bit.......its like an anxiety detector, it crashes or goes into screen saver mode just when you need all your hands to hold probes and trigger events....

Yes, it's happening to our instruments too. Customer wants to put his spectrum analyser on a network and he also wants to print the screen output. Rather than adding a printer driver and a network stack to the nice, fast purpose built GUI and RTOS the machine has, we port the whole lot to Windows. Now it needs a hard disk to hold all the bloatware that isn't required for a spectrum analyser, it needs virus checking, a much more powerful CPU and customers keep sending them back cos they fall over when they try to install MS Office on them  

Kevin

[amigov6]

 :DThanks all. I've pulled the lead in & out a few times( oo-er) & blown into the end ( Chopsdad, do'nt even say anything!!!) & we seem to be firing on all 6 again

[pete1666]

If its a lcd monitor and it goes when you move it  just get a new lead,
i just had the same problem for 3 months.

[TheBoy]

I have a rather nice Techtronix 564 oscilloscope....its got valves the lot in it!

My TT one has valves, think they may have gone a bit soft though...  ...really must get something a bit more up to date (and faster!)

[amigov6]

Problem seems to lie at the tower end of things, ok at the mo.

[Kevin Wood]

..really must get something a bit more up to date (and faster!)

Always lots of nice Tek ones always going on ebay for very little cash. Bit of switch cleaner and change the dried up caps and they're fine.

Kevin

[Ken T]

I know what you are saying about the 2236 being a sod to work on. I have a friend's 2235 with a  power fault, and trying to get probes in to measure things is not nice !. Also they started using custom parts in the 2465 series which are impossible to get new, and one of them the Horiz output I think tends to fail, so if it goes you have to pay about £130 for a replacement, or scrap the scope.   Mind you they are very nice to use when they work.  

[Kevin Wood]

I have a friend's 2235 with a  power fault

Mine failed with a power supply problem. I suspect the cooling fan packed up, closely followed by the MOSFET in (I think) the first stage switching regulator that takes mains down to about 50 volts DC IIRC. MOSFET is mounted to a heat sink just in front of the cooling fan IIRC. Mounting arrangement looked a bit marginal too so I replaced it using a proper mounting kit. That part runs hotter than I would like but has been reliable since.

Kevin

[Ken T]

Thanks for that, I'll check on mine.
Cheers Ken

[amigov6]

 :oWent to T***o today and was told to bring the lot in for a refund and they'll throw it all away.
      A:- What a waste, tower, speakers, camera, keyboard.
      B:- I broke the printer so no longer have the whole lot to take back.
      C:- Phone the warranty people.
      D:- Fuctifino!!!!!!!!!!!