As one of the pros that Dick mentioned I will second him - use Caig FaderLube - it is designed for controls. Caig D-10 and G-10 are contact cleaners designed for cleaning switches, not controls. Dale

know, pass on it. I agree with Bob. Also bear in mind that for many oscilloscope repairs you need a working oscilloscope to troubleshoot the dead 'scope.

emerged that 90+ concentrations. I use 99% IPA The reason why you don't see isopropyl alcohol stronger than 91% in stores is that at higher purities isopropyl is hygroscopic. 99% isopropyl must be kep

contact cleaner I clean out of Contact cleaner is for contacts, not for carbon controls. A chemical designed for use on controls and faders, such as Caig DeoxIT FaderLube, is what should be used on co

general. I still use analog meters for some purposes. I have an HP 400E in the shop and a 400-EL in the field for measuring RF up to 10 MHz. I also have an HP 427-A and a BBC Goerz Metrawatt MA 3E in

love them and still value resistors, read up to a In recent years I have sold almost all of my VTVMs while downsizing to prepare for moving to a smaller house. I have solid state equipment that does a

is/was intended for You might as well ask "what can I do with a buggy whip?" You can monitor NTSC video waveforms. That is all that it is useful for. Back in my days as Chief Engineer of a small comme

IBM had no need for a rack mounted 453. The 453 was developed by Tektronix specifically for IBM. The computer manufacturer needed something for field use that was not previously available - a compact

The original 453 (serials below 20,000) had Nuvistor inputs, as well as Nuvistors in the first stages of the sweep and triggering circuits, as well as pencil rectifiers in the HV supply for the CRT. T

DeoxIT is not intended for potentiometers - it is for switches. Caig FaderLube is intended for potentiometers and other controls.

What precisely are you trying to do? A 'scope display will be pretty much useless unless the sweep voltage is synchronized with the waveform being displayed, thus the development of triggered sweep.

I have spent 50 years repairing broadcast equipment. I strongly suggest that you pass the SX204 on to someone with a reasonably well equipped shop, including variable AC and DC supplies, rather than a

You would be much better off to sell the 577 to someone who wants and needs a curve tracer and buy a wall wart for the SX204. Using the 577 to power the SX204 is like using a Shelby Cobra to provide t

That patent has expired, but in any case I doubt that anyone is manufacturing variable autotransformers with tracks prepared as described in that patent. Certainly ISE is not ISE devices are Variacs w

Sorry abut that folks - I still haven't mastered my new email client - that should have gone to Miles and not to the list.

Miles - It is the largest volunteer genealogy project in the country. The site for West Springfield is at: https://sites.rootsweb.com/~mahampde/towns/westspringfield/index.html but there is not much i

I met Doc when I was a student in the MIT High School Studies Program in the mid '60s. Early on I spent some time wandering around and familiarizing myself with campus. In one corridor there were disp

The ugly of it is that someone else can uncorrect it.

Wikipedia misuses many technical terms - Wikipedia is worth what you pay for it.

Note that it is a variable autotransformer and not a Variac. Variac was originally a trademark of General Radio Company, and is now a trademark of ISE, Inc., for their brands of variable autotransform