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Old 10th May 2005, 06:03 PM   #1
MikeB is offline MikeB  Germany
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Default Need replacement part for Tek 466

Hello !

Is there anybody having a replacement tek-part "155-0115-00" ?
This is a hybridchip-amplifier for vertical deflection in a tektronix 466...
Seems not to easy to get this part !
The rest of the scope seems to be in perfect condition, so i would
really like to get it running again !

Any help would be great !

Mike
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Old 10th May 2005, 10:54 PM   #2
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Default Re: Need replacement part for Tek 466

Quote:
Originally posted by MikeB
Hello !

Is there anybody having a replacement tek-part "155-0115-00" ?
This is a hybridchip-amplifier for vertical deflection in a tektronix 466...
Seems not to easy to get this part !
The rest of the scope seems to be in perfect condition, so i would
really like to get it running again !

Any help would be great !

Mike
the only way to get some of these parts is to cannibalize another Tek scope -- this model will run anywhere from $20 to $200.
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Old 11th May 2005, 10:42 AM   #3
MikeB is offline MikeB  Germany
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You mean the "make one out of two" method ?
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Old 11th May 2005, 01:45 PM   #4
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i was lucky to find a 5L4N spectrum analyzer plug-in "parts unit" -- lucky because the other one I had was missing the "miller integrator" chip -- cannibalization is one way to go -- much easier in the US than Europe as we have a huge surplus market with low shipping prices.

the prices of some analog scopes are so ridiculously cheap that you might just get another 466.

it's a pity too -- an analog scope will never lie to you, a digital scope often doesn't tell the truth.
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Old 11th May 2005, 02:34 PM   #5
MikeB is offline MikeB  Germany
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The tektronix scope here in ebay-germany get quite high prices,
even the defect ones...
Especially the 466 storage-scope seems very recommended...
The one i got is definitely valuable, it has emi-shielding and isolated
inputs, means i can measure 2 channels with seperate groundings...
Also all the knobs, printings and so on are like new.
Otherwise i would resell it...

Mike
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Old 11th May 2005, 07:51 PM   #6
Whit is offline Whit  United States
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You might want to try here:

http://www.sphere.bc.ca/test/tek-parts/tekparts3.html
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Old 11th May 2005, 08:26 PM   #7
MikeB is offline MikeB  Germany
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Yep, thanks !
But this was the first adress i tried, but this part is on status "sorry,sold"...
I already asked by email, they really don't have one !

Mike
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Old 14th June 2005, 12:45 PM   #8
tekman is offline tekman  Germany
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2 MikeB:

A vertical amp hybrid from the 465 or 465B will work. Easier to get ;-)

Once you have opend your scope: Make shure to check the electrolytics in the LV supply, they often go bad due to age ("dry" caps)


hth,
Andreas
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Old 14th June 2005, 01:03 PM   #9
MikeB is offline MikeB  Germany
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Hi !

I thought it's the same chip ?
But, i was able to buy a new chip, was not cheap, 60us$...
Will replace it the next days.

How do i check these caps ? Optically they are fine...
And the scope needs ~2 days to discharge, after turnoff i
measure still 3v in the supply for days, they should be fine ?

Mike
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Old 14th June 2005, 01:45 PM   #10
tekman is offline tekman  Germany
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That is what I said: it is the same chip in these different scope types (465/465B/466. 7633 should have same too)

For caps: No, your method is not gving info about good caps in the way we need it here for this scope. If you want to make shure the caps are ok then you have to check for ESR . Do a google search .

Or look here : http://clientes.netvisao.pt/greenpal/evb1.htm

Buy one ESR meter and you will enjoy this as a VERY useful addition to your testbench.


hth,
Andreas.
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