Jim Yanik schrieb:



IMO,the SC504 is a piece of useless crap.
It's display is too small for anything other than monitoring.
It has no BW limit,and you get too much noise picked up,especially
considering the small graticule.
It's not the sharpest CRT beam,either.

He'd be better off buying a T932/935 or a 442 (35Mhz) scope than a SC504.
Even better; a 2235 100Mhz scope.
Any of those would also be more maintainable than the SC504.
And FAR better "cost-effectively".


For 7K mainframes;
7603 is a good choice,7704A or 7904/A better.
7A26 is the best of the 1MegZ 7K vertical plug-ins.
It has a 20 Mhz BW limit switch.

AVOID 7300,7400,7500 series!!



Well, the SC504 is worth to consider if you are fond of the TM500
series idea. The SC plugin fits nicely as a plugin. If you need a
simple scope and small space is a reqirement, SC504 and 502 are the
ones to think about.

But for a serious wjob, you're better of with a 7xxx or 2xxx series.
Sharper trace, easier to repair, more efficient work. The 7xxx here
around are so incredible cheap to buy nowadays, and offer so much
flexibity for working. If you have the space, to place such an
instrument, it's really worth buying it. It'll serve you for years, and
it's always a pleasure to do measurements with such a fine scope.

The T9xx are the plastic (vacuum cleaner apperance) scopes. It's a
matter of taste. surely not the best scopes Tektronix ever made, but
for hobby use more than adequate.


hth,
Andreas