Re: Lost Ch 1 on my 465 scope

Tom Lee

I didn't check to see if my reply had also been a victim of collateral damage, but I'll reiterate that the 465B and the 465 are significantly different. The 465B does use a Tek custom IC (the "spider" thing) in the front end, but the 465 does not. The latter's vert. preamp is all discrete.


Prof. Thomas H. Lee
Allen Ctr., Rm. 205
350 Jane Stanford Way
Stanford University
Stanford, CA 94305-4070

On 10/13/2020 14:02, pdxareaid wrote:
I posted a reply yesterday, which I will try to duplicate. Yesterday, I also reported an inappropriate post.
Today I looked and MY post was gone and the inappropriate post remained. Later in the day the inappropriate post disappeared.
I don't know if i did something or a mistake was made and the wrong post removed. I did have a link to an ebay post
to demonstrate a part was still available. Maybe that is against the rules. I don't know. I got no feedback. I will not include that
info this time.

I had a similar 465B vertical channel, which was damaged by the previous owner. I found, by tracing a signal from the probe thru
the channel, that the dual can Tom Lee and others mentioned was indeed blown as well as a 16 pin spider like Tektronix IC differential amp.
At the time, a few years ago, both were available, one off, on ebay and elsewhere for about $25 each. I looked and the spider is still available on ebay.
I am not posting that link now. There are several versions of that spider, differing in the last 2 digits of the part number, which you may want to pay attention to
in terms of matching both channel 1 and 2 using either spare parts or parts you may purchase.
Good luck.

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