| Products > Test Equipment |
| RESTORATION of TEK 7603 Scope w 7A18 amp + 7B53A timebase |
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| robrenz:
--- Quote from: grenert on December 17, 2012, 03:32:25 pm ---Two questions: What are magic sponges? Where do you get those tiny, tiny brushes for the BNC connectors? --- End quote --- Magic sponges are Melamine foam. A brand name is Mr Clean magic eraser (most expensive way to buy them). google magic sponge for lots of sources. They wear out quickly but one sponge did this whole restoration. They really are magic! There is a hyperlink (underscored blue text) right in the thread that will take you to the Microbrush site. |
| SeanB:
Links are inline in the text for the Eshops. Lovely work there, I normally just use brass polish liquid ( leave it in the tin for a week so it settles out from the abrasive) and a cloth. Learnt that from cleaning ceremonial uniform brassware so it would shine, I also made a sheet plate to act as a cloth protector for the buttons, so I did not have to remove them every week to polish. I did pay to send a set in to be gold flashed, never needed to polish them again, but they were for special parades only. |
| robrenz:
For some reason Tek did not provide power for the illuminated pushbuttons on the 7603. I followed the instructions from the update kit PDF for installing a LM309K to provide the 5V to the main interface board that the plugins plug into. I made up the mounting bracket out of aluminum angle. The EMI shield strips were all pretty dull with a heavy oxide layer. These things are very thin material and easily kinked. So I sanded down a paint stir stick to precisely match the shape of the EMI strip so it would be a press fit. I used Astonish cleaner to polish these because it is a fairly aggressive abrasive as cleaners go. (don't use on BNC's it will remove the nickel if you polish very long). I used a felt pad and I could bear down on the strips since they were fully supported by the custom wooden mandrel. Before (an especially corroded example) After I have lots of other pics of the internals but It would be the same stuff as other rebuild threads on here so not much point in posting. The End. ;D |
| SeanB:
Any reason for using the TO3 part over the TO220 other than it matches the rest of the unit construction? Lovely finish on that angle there, you probably got better surface finish than the original heatsinks have. |
| ModemHead:
Truly awesome work. Thanks for sharing your techniques with us. It reminded me that I have some of that wadding polish, I had forgotten about it and never thought to use it on things like BNC connectors. Interestingly mine is called "Ever Brite" as opposed to "Nevr Dull". :) |
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