Anyone know where can i find the full service manual for the tektronics cfc-250 frequency counter ? thanks
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Tektronics CFC-250 Frequency Counter
- Thread starter kaos513
- Start date
I just spotted your post. I will start searching later this evening after the dust settles here.
Check your part number again and them go here: https://forum.tek.com/search.php?keywords=CF+250&sid=10124db8a30b60e47c505e252382bf71
Check your part number again and them go here: https://forum.tek.com/search.php?keywords=CF+250&sid=10124db8a30b60e47c505e252382bf71
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I did search someonein forums suggested aligator clips instead of probes would that help me read lower frequencies ?
I never use alligator clips, since they are too large and can touch other parts on the board and then short. Which is bad news.
I use wire grabbers and then it is much easier to work with with no chance of a short happening.
http://www.mouser.com/ProductDetail...MI-fG8hM_21gIV2ksNCh0CoAbEEAkYBSABEgIaV_D_BwE
I use wire grabbers and then it is much easier to work with with no chance of a short happening.
http://www.mouser.com/ProductDetail...MI-fG8hM_21gIV2ksNCh0CoAbEEAkYBSABEgIaV_D_BwE
I use Oscilloscope probes. Get the ones that are switchable between 1 to 1 and 10 to 1. Start off with the probes set to 10 to 1 and that will keep you from hurting your frequency counter. Did you find your manuals?
Good luck on that.
They built their equipment to last and when it gets too old the don't support them anymore hoping you will buy new ones. I wish you success because if you get help I might start knocking on their door for help with one of my old spectrum analyzers.
Do you feel confident enough to repair a freq counter?
Check and reheat/solder any solder joints that are really dull looking in appearance.
But going after a faulty IC is just going to be just LOADS of fun . . .
Check and reheat/solder any solder joints that are really dull looking in appearance.
But going after a faulty IC is just going to be just LOADS of fun . . .
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Back in the bad old dark ages frequency counters were expensive. Made it worth while to repair them. Saw a lot of the inline types with two coax sockets get smacked by lightning surges. Didn't have to hit the antenna to blow them out, just the neighbor's tree, if it was close enough.
Never did figure out how to do it without a 'scope and a manual, or at least a schematic diagram.
Also found that having the data book for each chip in the counter could help understanding how the thing works. Too many diagrams just show a rectangle for each logic chip with no hints about how the individual pins actually behave. The databook listing of the individual chips would serve to explain how that part is meant to behave.
Never have seen that model.
73
Never did figure out how to do it without a 'scope and a manual, or at least a schematic diagram.
Also found that having the data book for each chip in the counter could help understanding how the thing works. Too many diagrams just show a rectangle for each logic chip with no hints about how the individual pins actually behave. The databook listing of the individual chips would serve to explain how that part is meant to behave.
Never have seen that model.
73
The counter works fine just need it for my files its not a big deal , was hoping to have it but its ok thanks everyone for helping.