FLUKE 1980A digital counter 5Hz to 515MHz 1974 test teardown 

Hi Thomas, nice counter, I thought it was a Tek from the case color. Those displays are amazing, I have several similar displays at home, they also have a built-in chip, but I have not seen them with dot display with stripes. Congratulations on purchasing a device of a reasonable size and normal weight 😂 Nice day 🙂Tom

The nail varnish is good, but also I got some of those bottles with brushes, and filled the one with some very viscous silicone oil, used to lubricate switches and such, and also used to thin out heatsink compound when applying it to a component, so that you have the required thin film only. Plus also small bottles with flux, to add a tiny amount to a solder joint to make reflow easy with no added solder, or a drop on solder wick to give it more sucking ability. Note that there are cases of the QC stamp, done with carbon containing India Ink, can create conductive tracking across a PCB, so in high impedance areas remove that marking ink completely. That nail varnish can also be used to stick down the capacitors you replaced. and the new silpads are perfect to swap out the thin beryllium copper pads used there, using a more modern material that is much better, and more compliant. I keep the ones out of dead CD/DVD drives, they are perfect for this application, small and right thickness, plus will self adhere to the panel before you place the board back.

The 16x divider looks like ECL logic which was popular at the time. Uses lots of power and is TTL compatible

Old Monsanto LED displays, even though made by TI the LED dies are Monsanto with that red. Got the later version of it withthe Fluke ASIC, and the flexed PCB that mates the board to the display.

Those look like TIL306, These displays are real power hungry, I'm not surprised they tried to cool them. I' don't know how much those fingers are going to conduct away ... but every bit helps here. Then again, they don't even seem to be contacting on the actual DIE in there.

👍

Probably transfers enough heat from the displays to make the difference between the displays surviving or not - these displays run really hot, with a conventional-TTL chip that also has to drive all the LEDs.... Interesting detail on the front board is using an ECL (aka 1970s very-serious-fast-logic) line receiver as the input!

Nail polish and acetone, what is the ratio of the 2 liquids Thomas?? Robert San Diego, CA. USA

The position of the mains connector is weird

Check your spam folder, my comment from yesterday is no longer here??? Thanks! ~Jack, VEG