Teardown and Repair of a Racal-Dana 1992 Frequency Counter

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  1. Kerry Wong
  2. Frequency Counter
  3. Racal Dana
  4. Reciprocal Counting
  5. AD7528
  6. AD9687
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Комментарии
Автор

Nice instrument! Judging from the front panel I wouldn't have expected it to have such advanced functions and diagnostics.

reps
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Beautiful instrument. I had a counter like this a few years ago

Testequip
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Excellent troubleshooting and step-by-step explanation. Very well done. And the end result! 👍🏻

davecc
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I gave this a thumbs up. When troubleshooting it allway good to check for socket chips as this is a give away that the part may have been replaced before. If all the chips are socketed well c'e la vie.

felixcat
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Great repair and explanation! Thanks as always!

ruhnet
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Got a Racal Dana 1998. I like the stirdy housing, it is really rugged.

ChipGuy
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Nice find Kerry! Agree on installing a socket but sometimes a component really needs to be down flush to the board for RF purposes although most often not. When you're working with your diagrams you may want to change the camera to a fixed focus on the page as it kept changing between the diagram and your hand and made it a little hard to watch; I don't remember that being an issue with your previous videos. Thanks for the explanations, always learn something new on your channel!

PapasDino
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I have one Dana instrument- a 3-1/2 digit multimeter from the early 1970s with Nixie tube display...

douro
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It looks like it has the same MOS Vic chip for video output ore display output as the Commodore 64 had.
Nice video. Well explained.

pdjdw
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Hey I’m having trouble finding a part number for channel C fuse. Any idea on what it could be ?

dgeeking
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I have one and channel C is not working. Does anyone know where the fuse is located for channel C? Thanks!

agagnon
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Channel A doesn't work on my unit either. It also has a crystal oven but none of the resistors look burned or broken and there was no rework, the seal on the cabinet was not even broken. Channel C works but the freq. reading is a bit off. Did you have to calibrate yours?

stevec
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Where did you find the service manual for this unit? I'd like to have a copy of that for mine.

stevec