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-   -   Used scopes... (https://www.diyaudio.com/forums/equipment-and-tools/80620-scopes.html)

TroelsM 31st May 2006 12:29 PM

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

Apex Jr 31st May 2006 02:54 PM

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.

TroelsM 31st May 2006 06:10 PM

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

Stocker 31st May 2006 06:38 PM

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.

Apex Jr 31st May 2006 06:53 PM

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.

1audio 1st June 2006 07:00 AM

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

TroelsM 2nd June 2006 06:26 AM

1Audio: Yes youre right. its a 7623A.

What about the Philips Scopes´?.

Regards TroelsM

es44 2nd June 2006 06:57 AM

Hi Troels.
Can i PM you ?
You might guess why

Best regards
Ebbe

dfdye 2nd June 2006 07:18 AM

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.

1audio 2nd June 2006 03:02 PM

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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