Jim,
I wasn't refering to working on them. The 485 has a very bright / fine
focused CRT. The 1 Megohm / 50 Ohm attenuator with 350 MHZ bandwidth
really made the scope and it's small size was very nice. The low
voltage / high voltage section is a dog but we didn't have many fail. I
did a lot of calibration / performance checks on them. The attenuators
were a little tricky to calibrate considering it had the 50 Ohm / 1
Megohm built into one. I have a 2465B (400 MHz) on my bench and use it
a few times per week. I do like that more than a 485. Before getting
the 2465B (12 years ago) my favorite was a 475A with the DM package. I
really dislike digital scopes as most of my work is troubleshooting,
but the cursors make critical measurements easier. Take Care, Kevin


Jim Yanik wrote:
"carneyke" wrote in
oups.com:

Jim,
At one time, we would remove the attenuator and send it to the factory
in Beaverton, if we couldn't clean them and fix the problem. One of
the best scopes ever made...

Well,I gotta disagree with that.
The power supplies (LV and HV)were very hard to troubleshoot and repair,and
that's the most failure prone part of the 485.
They buried the HV in the *middle of the scope* under everything else,and
there were those comb connectors tying the circuit boards together...

And those attenuators were a PITA.they were always getting flaky.


IMO,the 2465 series was the best of TEK.
Another fav of mine was the lowly 422(non-battery version);15Mhz,but a
sealed cabinet and few problems,just repaint the case,replace the worn
rubber feet,and cal.The insides of the 422's were always nice and clean.
It was a pleasure to take a grubby,scraped-up 422 and make it look new
again.customers were always amazed when they got them back.

--
Jim Yanik
jyanik
at
kua.net