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Post by Deleted on Sept 17, 2013 11:33:17 GMT -6
I am suspicious that the t-pad attenuator on my 1176 build is not attenuating enough. How can I check it?
sorry is this is a painfully obvious, noob question!
pace
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Post by tonycamphd on Sept 17, 2013 11:52:25 GMT -6
I am suspicious that the t-pad attenuator on my 1176 build is not attenuating enough. How can I check it? sorry is this is a painfully obvious, noob question! pace Hi pace, putting my fluke leads across pcb + pad output, and + pad input, i get an average (3 tested), 1.089k fully attenuated, and 0.4 wide open on my t-pads. these are t-pads soldered to the mini pcbs, and not installed. hope this helps T |
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Post by svart on Sept 17, 2013 12:34:05 GMT -6
You'll have to remove them to measure. In-circuit measurement will result in strange readings due to the other stuff in the circuit. The numbers that Tony reports look reasonable.
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Post by Deleted on Sept 18, 2013 2:42:15 GMT -6
thanks Tony, thanks Svart. Really appreciated.
pace
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Post by Deleted on Sept 18, 2013 12:20:09 GMT -6
Well, thanks to your suggestions I removed the t pad to find that it was not correctly soldered at two of the terminals. Res oldering has solved all of my problems. I feel like an idiot of course. A good example how you have to be very methodical in building DIY to avoid problems.
thanks again
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Post by svart on Sept 18, 2013 12:34:52 GMT -6
No problem. glad you got it fixed.
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Post by tonycamphd on Sept 18, 2013 16:16:24 GMT -6
good news pace! 9 times out of 10, when i discover the source of a problem in my diy projects, it's followed by "I'm such an idiot!" lol
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