Electronics > Beginners
Analog scope what it's worth?
BravoV:
--- Quote from: rstofer on January 30, 2020, 06:00:44 pm ---... the one shot trigger of a DSO makes all the difference in the world.
--- End quote ---
Psssttt .. this is the biggest secret recipe that most noobs never get it for 1st time, especially when in confusing moment in choosing analog vs digital scope, and when it times and this will bite really hard, its really-really painful once the noob realized it. :-DD
To OP, if you thinking real man uses analog scope, let me share you story about analog scope, I own Tektronix 2465B 400Mhz beast, lots of experienced people recognized it probably one of the best analog portable scope ever made on earth.
Tell you a dark secret about it, this particular scope, even its never used from factory, still sealed in original plastic wrapping, resides in the original factory box, and never exposed to humidity nor extreme bad temperature, still it will rot by it self. And when you hook up to AC mains to power it up, there is a big chance the power supply part will explode and smoke your room with nasty smell. :scared:
Btw, if you're so confident, just get one, and btw, in order to fix a scope, 99% you need "another" working scope. >:D
rstofer:
--- Quote from: ejeffrey on January 30, 2020, 05:54:24 pm ---Hours of use for a oscilloscope is almost entirely meaningless.
--- End quote ---
Unless a trace has been burned into the phosphorous. This is far more of a concern on CROs than DSOs.
james_s:
CRTs do have a finite lifespan, the cathodes wear out even if the phosphor is not burned. It's really not a big issue though, it's easy enough to tell if the tube still has a decent amount of life, and a CRO with 10% of its useful life left is a lifetime of use for the typical hobbyist.
The ONLY reason to seek out a new old stock analog scope is you are a collector looking for something unique, and IMO the main reason for a hobbyist to look for an analog scope is because old used ones can be had very cheaply and I think everyone should spend a bit of time with one at some point. Once you have a good handle on how a scope works there are very few reasons to use analog anymore though, the trace looks very nice and clean but that's because it is hiding information from you that a digital scope will display. NOS analog scopes are going to be quite rare at this point so if you do manage to find one it will likely cost you more than a brand new Chinese DSO and unless it's something exotic and you have exotic needs, the DSO will be far more capable.
You can't base value on what sellers are asking for stuff. There are thousands of items just sitting on ebay collecting dust waiting for a sucker to come along. It has a multiplying effect where someone else finds something they want to sell, looks on ebay to see what people are asking for similar units and then they post it for a similarly optimistic price and pretty soon there are piles of these things sitting there with sky high asking prices. If you want an idea of actual value you have to search for sold items and see what they actually sold for. Of course this doesn't work for "best offer" items, it just says offer accepted.
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