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Oscilloscopes to stay away from? (spec: Tek 2337 question)

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mikeselectricstuff:
The 2465A was probably the best general-purpose analogue scope ever made. The main issue is that they used some custom ICs that were unobtanium - they don't fail often but if they do it's Game Over. However the comments above from Tekfan suggest that now that analogue scopes are much less in demand and prices have dropped, there may now be enough recycled spares floating around at reasonable prices, but the supply will dwindle eventually
The moral is don't buy a dead one unless it's cheap enough to be a gamble - working ones seem to be available for around the price of a much lower-end digital scope these days.
You need to pay for a DPO/invinivision type digital scope to get comparable performance to something like a 2465.

Teknotronix:

--- Quote from: mikeselectricstuff on May 25, 2011, 11:24:33 am ---The 2465A was probably the best general-purpose analogue scope ever made. The main issue is that they used some custom ICs that were unobtanium - they don't fail often but if they do it's Game Over. However the comments above from Tekfan suggest that now that analogue scopes are much less in demand and prices have dropped, there may now be enough recycled spares floating around at reasonable prices, but the supply will dwindle eventually
The moral is don't buy a dead one unless it's cheap enough to be a gamble - working ones seem to be available for around the price of a much lower-end digital scope these days.
You need to pay for a DPO/invinivision type digital scope to get comparable performance to something like a 2465.

--- End quote ---

Has anyone reverse engineered the IC's or have a block diagram?

EEVblog:

--- Quote from: mikeselectricstuff on May 25, 2011, 11:24:33 am ---The 2465A was probably the best general-purpose analogue scope ever made.

--- End quote ---

I'd concur with that. They are still highly sort after on ebay.
Don't forget the 2225 is you are doing low level signal work. The 500uV/div sensitivity is pretty much unmatched by any other scope?
http://republika.pl/rubi/oscyloskopy/tek/t.pdf

Dave.

mikeselectricstuff:

--- Quote from: SimRacer on June 03, 2011, 04:43:10 am ---
--- Quote from: mikeselectricstuff on May 25, 2011, 11:24:33 am ---The 2465A was probably the best general-purpose analogue scope ever made. The main issue is that they used some custom ICs that were unobtanium - they don't fail often but if they do it's Game Over. However the comments above from Tekfan suggest that now that analogue scopes are much less in demand and prices have dropped, there may now be enough recycled spares floating around at reasonable prices, but the supply will dwindle eventually
The moral is don't buy a dead one unless it's cheap enough to be a gamble - working ones seem to be available for around the price of a much lower-end digital scope these days.
You need to pay for a DPO/invinivision type digital scope to get comparable performance to something like a 2465.

--- End quote ---

Has anyone reverse engineered the IC's or have a block diagram?

--- End quote ---
Around 10-15 years ago, when 2465's were still fetching £2-3000  I did wonder why, with  off-the-shelf semiconductors 20-odd years advanced from where they were  when the scope as released, nobody had done PCBs to replace the hybrid modules. I do recall reading about 5 years later that someone was working on something, but by then digital scopes had caused the prices of analogue scopes to plummet, and a lot of the old 2465's with dead hybrids had probably been long since scrapped.

--- Quote from: EEVblog on June 03, 2011, 06:30:08 am ---
--- Quote from: mikeselectricstuff on May 25, 2011, 11:24:33 am ---The 2465A was probably the best general-purpose analogue scope ever made.

--- End quote ---
I'd concur with that. They are still highly sort sought after on ebay.

--- End quote ---
A quick look on ebay shows 2465A's with  cal & warranty can be had between £300-500, which is amazing value for money.  When I got my MSO6000, I considered selling my 2465A, but the prices they fetched just weren't worth it.
 

Sigmoid:
What's the say on Tek 2201s? I saw one with a seller warranty on eBay, but quite far from cheap for a 20Mhz scope.
How complex are they from the inside (hybrids, etc.)? Is it likely to develop problems?

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