Re: 465 Display Help Needed - another thought
--- In TekScopes@y..., Kurt Graber <kurtg@s...> wrote:
thefocus on the trace with any combination of intensity, focus or
getexception of the high voltage, crt bias and cathode bias, until I
...........................................the use of an HV probe. Can anyone tell me if I am looking in the
that the focus and astig tap into.that one
of the resistors has opened up. I have seen many cases !!! youdon't
HV probe , just take your meter and ohm them out. They will notappear burned
but they have a tendancy to open up due to the highvoltage.......this will
cause an unsharp trace and many cases no trace at all (just ahaze)...Good
LuckAnother point: the 46x, 47x series just wasn't as sharp as the tube
scopes! or even and especially - the 454, 454A. Some engrs. think
the 454A best 150 MHz scope ever (2mV/DIV, all the delay triggering)
or sometimes ~ 200 MHz if all went well on that assembly..
I can see the clear difference bewtween say, a 475A and the 454As -
tiny wiggles just visible on 54-A disappear into the thick trace of
475 (or 465).
Just in case you're trying to do better than it Can!