On Tuesday 24 September 2013 06:45:22 Mark Wendt did opine:

> On Mon, Sep 23, 2013 at 9:10 AM, Gene Heskett <ghesk...@wdtv.com> wrote:
> > On Monday 23 September 2013 08:49:33 Mark Wendt did opine:
> > > Nah, he needs one a these:
> > > 
> > > http://www.ebay.com/itm/161110870354?ssPageName=STRK:MEWAX:IT&_trksi
> > > d=p3 984.m1423.l2649
> > 
> > But thats a Tek, its waaaayy old, and according to the link, a box of
> > parts.  He needs something that Just Works, not a service engineers
> > worst nightmare before he even gets back to thinking about his
> > problem.
> 
> Then how about this one:
> 
> 
> http://www.ebay.com/itm/271275574595?ssPageName=STRK:MEWAX:IT&_trksid=p3
> 984.m1423.l2649

Thats a lot better, and its a good price too.  But I'd need a cart, one 
capable of climbing stairs, or negotiating the hill of my back yard getting 
to the shop.  How old is it?
 
> You realize that the above was written tongue-in-cheek...  ;-)
> 
> > I have long time experience with 2 different Hitachi scopes.  You turn
> > them on, and they work.  Those Tek things were great when A, they
> > were new, and B, in an R&D lab.
> > 
> > Tek today is a far cry from the Tek that impressed the hell out of me
> > in the early 60's when they had a lifetime warranty.  But now they
> > clean out the parts crib 30 milliseconds after the federally mandated
> > 5 years support period has passed and beyond that 5 years there is NO
> > support.
> 
> The beauty of those mainframe scopes is they are repairable.

Even when the last one of that model to come off the line is 10 years old?  
To repair, one must have access to the inhouse, custom made parts.  My last 
interface with Tek (they are AKA Grass Valley Group and make  big 
production house sized video switchers with effects) was when I needed one 
of their custom IC's on a plate, basically a high speed op-amp.  They had 
one left, $1700, take it or leave it & had no idea if it was new or used or 
even good.  So I went looking for a video op-amp usable at those supply 
voltages & talked National Semi out of 2 samples.  It worked, but was 
enough faster than the Tek gizmo that you could see the color shift as the 
fader was moved.  I should have ordered a stick of them & replaced all of 
them, which would have put it all back in color phase.  But putting it in 
was a bitch, and really should had had a pcb made as its leads weren't 
quite long enough to reach the pcb holes where the Tek part was soldered 
in.  If I would have had my mill cutting pcb's then, I would have.  IIRC I 
would have needed 144 of them.  The switcher was a 24 input, 6 bus model.  
Bigger control panel than the 1701-D.  The better op-amp? $1.13 in 100's.

> I'm up to
> a half dozen, in lab mainframe scopes to TM500 and TM5000 plugin
> scopes.  And they all "Just Work."  ;-)
> 
> > Heck, for this job, one of the DS-2O1's would work, but he would have
> > a far harder time learning to use it with its limited controls that
> > do everything depending on the mode its in, and its bandwidth is such
> > that it would miss step pulses, confusing him.  He isn't familiar
> > with a "scope" at all I suspect, so he needs something where every
> > knob does exactly what you expect once he learns what to expect.  The
> > phrase Just Works keeps coming to mind.
> 
> Mark
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Cheers, Gene
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
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A pen in the hand of this president is far more
dangerous than 200 million guns in the hands of
         law-abiding citizens.

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