Hi, I am looking at getting some of the dual rotary encoders that were used in the CG5010 and CG5011 manufactured (The newer version of the CG551 & CG5001). This is the units per division knob

Is the fan working OK? -- Richard Knoppow dickburk@... WB6KBL

I have a Tektronix 453 oscilloscope that was built in 1967. It's the early version that uses Nuvistors where high impedance was needed. Its been working fine until recently. Now, when I turn it on

Hi Christopher, The 575 Mod 122C is very desirable because of the additional 400V collector range it has. The only drawback it has (by today's standards) is the base voltage steps are not big enough

Hello-- ...Also, the state of nervous anxiety achieved while working in the vicinity of several thousand volts<g>. Remember the one-hand rule: keep one hand in your pocket while probing high

Dennis I think you have to be right - the quality and fitment of the metalwork is upto tek standards. Will be interesing as a project to get working! Christopher [Non-text portions of this

Hi Christopher, This is definitely a factory modification. The nomenclature appears to be part of the modification so the key switches could not have been added after the fact by someone other than

I have ordered some RubyFluid, so when it arrives in a week or two, I'll give it a try. Bob

TekScopes@...> wrote: I have seen numerous failed 4051s in a different application where they started to leak signals from one pin to another. Normally they connect only one channel from

Thanks for the suggestions David. I saw a manual for sale at VintageTek and so bought it. Like to support the museum and the foldout stuff is so much easier to use than even the best scan. I

Extra High Tension. The accelerating voltage. ST [TekScopes] <TekScopes@...> wrote:

Greetings, I have a 575 which is in storage and has been for probably ten years. I am hoping one of these days in the not distant future to have enough room in my lab to bring it out of

to sort The EHT transformer comes in two varieties. Earlier - epoxy potted, with everything that implies, and later from 1971 - silicone potted, which seems to work just fine. But the epoxy one has

Some pics now uploaded uinder the heading 'Tek 575 Mod 122c Front' Looks like the lower on/off switch connects the .percentage of peak volts range' rheostat to its +ve supply Still no EHT, but

The start-up delay is normal.  The LVPS (Low Voltage Power Supply) is quite intricate by the standards of the time.  A "Mains Section" is directly connected to the mains supply and must be handled

What is odd about this capacitor placement error is that it was never corrected in any of the 24x5 service manuals I've seen, from the early 24x5 on up to the last 2465B/2467B manual. tom

Machine Guy, Thanks. That was a good answer to my question and I had to ask just to make sure. You know how it goes, the one time you don't ask, something comes back at ya. Even more appreciated is

The change in size is for convenience and some negligible (most think unnecessary) improvement in ripple.  But the replacement caps fit in the space of the old caps and are a more uniform arrangement

Tek fans, I've posted about this before, but another opportunity to move this scope on to a new home has come up. A few years ago I restored a 549 storage scope into full working order. Since then

Machine Guy, Thanks for the heads up on the C1115 vice C1132 Cap issue. From the file 2465LVPS, posted here, or TekScopArc...shows increase in size in electrolytics, from 180uf, 250uF (20V, 40V) to