开云体育

Eventually I have got it!
The entire story is reported at

I want to thank you once again the group for the support and in
particular Mr. Fred de Vries who helped significantly.
Until next time, ciao.

Thanks Emanuele for your extensive coverage for cleaning the pots of
an 475. I'm sure more people appreciate this nice stor, because it is
one of the most common failure's in 465, and 475 scopes, probably the
best scope line ever build by Tektronix.

Fred de Vries, Holland