Products > Test Equipment
True analog scopes
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tggzzz:

--- Quote from: mawyatt on December 15, 2022, 03:14:44 pm ---We had to purchase 4 Tek scopes to get two in actual working order, one literally blew up while just warming up (infamous RIFA cap). So we now have 2 beautiful Tek 2465 analog scopes that have been restored with countless hours for power supply recapping, troubleshooting, cleaning and main PCBs recapping. One required an extremely delicate ceramic hybrid input attenuator modules repair & rebuild, another required troubleshooting the defective scope cal and all required extensive cleaning & recapping. So 100s of hours invested in studying, troubleshooting and restoring each 2465 and ~$100 in replacement caps and components.

Was this fun? You bet!! Would one do this if they didn't enjoy restoring these old relics, and needed a working scope right away that they could rely on for income? Probably not!!

As far as analog vs digital scope discussion, the 2465s hardly ever get used and only for an occasional revisit to past, fun to play with but we never utilize them for any serious work anymore.

Why? Because the modern DSO has replaced almost every measurement need we've encountered, then some we didn't even think about!! Of course one must have the skill and knowledge to use such, and they do require a "learning curve" just like any new instrument that's to be used to perfection.

We've used just about every analog scope Tek has made over the past 60+ years, and a few from HP, B&K, Heathkit, Iwatsu and others, and are an old engrained analog type that wasn't fond of DSOs in our lab back before retiring, altho didn't get in the labs much then (another story).

After realizing our narrow minded short-comes, we decided to acquire a DSO and "Spend the necessary time without prejudice to learn this new to us instrument". Only regret is we should have realized the benefits of these DSOs a decade earlier  ???

Of course YMMY!!

Best,

--- End quote ---

...all sensible points!

A modern medium-to-high end digitising scope really is a miracle of technological advance. But that is far less clear for a low-end or decade old digitising scope.

Unfortunately I have heard too many people saying they want a digitial scope solely because of the auto-setup button. On further questioning, they actively don't want to learn what's in a scope, nor its pitfalls and traps, nor how to get the best from it.

I haven't tested whether those people would also like a Tesla "full driving (beta)" car for similar reasons. I suspect so :(
Fungus:

--- Quote from: tggzzz on December 15, 2022, 06:39:05 pm ---Unfortunately I have heard too many people saying they want a digitial scope solely because of the auto-setup button. On further questioning, they actively don't want to learn what's in a scope, nor its pitfalls and traps, nor how to get the best from it.

--- End quote ---

Micsigs have a mode where they continuously adjust the horizontal/vertical scale to track the input signal - no need to press a button!  :)

rf-loop:

--- Quote from: tggzzz on December 15, 2022, 06:39:05 pm ---
Unfortunately I have heard too many people saying they want a digitial scope solely because of the auto-setup button. On further questioning, they actively don't want to learn what's in a scope, nor its pitfalls and traps, nor how to get the best from it.

I haven't tested whether those people would also like a Tesla "full driving (beta)" car for similar reasons. I suspect so :(

--- End quote ---

 :-DD :clap: :clap: :clap:
2N3055:

--- Quote from: tggzzz on December 15, 2022, 06:29:55 pm ---
And if you were in Antartica, as some denizens of this forum claim, shipping would be even more expensive. So what?! Ditto the more realistic example of Brazil.

--- End quote ---
:-//
bdunham7:

--- Quote from: 2N3055 on December 15, 2022, 09:59:48 am ---For 300€ you cannot buy good working old CRT Tek scope, even 20 MHz one...

--- End quote ---

To be fair, this may be true for you, but isn't the same everywhere.  Of course local conditions will make a difference in these sort of things.  In the past few years I've sold some fairly nice scopes with (unofficial) calibration and warranty for under $300.  I paid $29 each for a Tek 2445 and a Kikusui COS5100 and both were completely in working order.  The deals aren't quite that good these days, but if I were selling either of those today I would not expect over $300.  And they're both actually pretty good scopes. 
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