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Old 31st May 2006, 12:29 PM   #1
TroelsM is offline TroelsM  Denmark
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Default Used scopes...

Hi.

This has been debated a lot and i have searched old threads but did not find an answer. So here goes:

I have an opportunity to buy one or more old scopes' from the list below:

Tektronix:
465
475A
485
2225 (550Mhz)
2230 (digital)
2235 (100Mhz)
7632 (Storage)

Philips
PM3218
PM3267

All of them should be in working order and have been calibrated on a regular basis.

And now the impossible question: What to buy?

I'd like to measure audio AND digital signals (<1Mhz).

I'm working with PIC's, audio (low-level, class AB, D) and whatever comes my way.

I know that one scope might not be enough, but I could buy more than one.

Please comment.

Regards TroelsM
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Old 31st May 2006, 02:54 PM   #2
Apex Jr is offline Apex Jr  United States
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One thing you forgot to mention is the prices...
Depending on what they are can better decide
which is a good buy.
The 250Mhz Tek 475A is a great scope and a work
horse. Prices should be around $200.00 working.
Also the 2235 is a good scope around the same price.
The 465 is to old. If it was a 465B it would be OK..
Steve @ Apex Jr.
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Old 31st May 2006, 06:10 PM   #3
TroelsM is offline TroelsM  Denmark
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Hi!

Thanks for the fast reply.

The scopes are on auction but the prices should not rise to high as it's an "closed" auction with people from my firm.

I know that the 465 is getting´ old by now, but if the price is right and its in perfect condition?

Keep the advise coming´

Regards TroelsM
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Old 31st May 2006, 06:38 PM   #4
Stocker is offline Stocker  United States
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The 485 is a good model unless you blow it up. Previous technician left a screw in mine, but before that I was using it at work for all sorts of testing.
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Old 31st May 2006, 06:53 PM   #5
Apex Jr is offline Apex Jr  United States
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The 465 is the 1st of it's type there have been 3 revisions
with the 465B with both the DM 41 and DM44 options.
YES, your right if it's cheap and working it's a good scope.
The 485 scope is 350Mhz and has a very small screen
like the 453 scope and I would prefer the others.
Steve@ Apex Jr.
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Old 1st June 2006, 07:00 AM   #6
1audio is offline 1audio  United States
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I would get the 7623. (Check your model number. Tek didn't make a 7632 http://www.tek.com/Measurement/cgi-b...=oscilloscopes ) The plugins are cheap on eBay and you can do almost anything with it. Make sure its healthy, storage CRT's are delicate.
-Demian
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Old 2nd June 2006, 06:26 AM   #7
TroelsM is offline TroelsM  Denmark
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1Audio: Yes youre right. its a 7623A.

What about the Philips Scopes´?.

Regards TroelsM
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Old 2nd June 2006, 06:57 AM   #8
es44 is offline es44  Denmark
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Hi Troels.
Can i PM you ?
You might guess why

Best regards
Ebbe
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Old 2nd June 2006, 07:18 AM   #9
dfdye is offline dfdye  United States
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I personally have a 475A, and I love it. Unfortunately, I don't have a lot of experience with the others you listed, but if this one is under $250 I wouldn't hesitate to pick it up if it is indeed in good condition. Be sure to check the focus and brightness of the CRT!!

David


Oh, and I have never heard of anyone I know using a Philips scope, so that should tell you something. Tektronix and HP are the only two brands of scopes you should consider IMHO. Sort of like Flukes and DMM's.
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Old 2nd June 2006, 03:02 PM   #10
1audio is offline 1audio  United States
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Philips never had much penetration into the US market. I have seen a few and they were interesting and seemed well made. And they had a multiplier feature for the X inputs so you could see power directly.

Must have been more popular in Europe.
-Demian
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