I sold an apparently working U800 to a list member from an old 2445. Though the scope seemed to function just fine on initial testing, he later emailed this back:
"I left FB after doing just a quick test at 1ms/Div. After more testing I discovered that it is very noisy at 10X when time base is faster than 5ns/Div after a quick 2 minute warmup. This Horz Amp is not usable."
So I refunded his money. What I take this to mean is that the U800 can be failing or not meeting specs even without total failure. Just something to keep in mind.
Chip
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--- In TekScopes@..., "victor_j_silva" wrote:
Sounds very much like the U800 issue.
About six months ago a posted about baking some U800s that had failed this way and was able to rejuvenate them.
I put one of the U800s in a test scope and it's still working to this day. I'm amazed.
--Victor
--- In TekScopes@..., "cmjones012003" wrote:
Hello all,
I haven't posted to this list in a long time but have just been lurking, I'm afraid.
[SNIP]
Thank you in advance
Chris
Cambridge, UK
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