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Total 6 documents matching your query.

1. Topband: Bias Tee Measurements (Test Data) (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Sat, 23 Aug 2014 22:48:53 -0400; Late last year Pete (N4ZR) reported problems with his home brew Bias Tee that included radical shifts in measured impedance when DC voltage was applied to his Bias Tee. Today I decided to make impeda; /archives//html/Topband/2014-08/msg00236.html (9,650 bytes)
2. Re: Topband: Bias Tee Measurements (Test Data) (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Sat, 23 Aug 2014 23:29:00 -0400; We cannot test impedance that way with a DC coupled impedance meter and get good data with any noise in the supply. Any test is meaningless. The .1 capacitor will just couple any distortion or ripple; /archives//html/Topband/2014-08/msg00237.html (11,592 bytes)
3. Re: Topband: Bias Tee Measurements (Test Data) (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Sun, 24 Aug 2014 02:06:05 -0400; Tom, you said "Any test is meaningless", and I don't understand where you are coming from on that statement. If you look at my test, I tested with and without the bias Tee, and I tested with a well r; /archives//html/Topband/2014-08/msg00238.html (14,001 bytes)
4. Re: Topband: Bias Tee Measurements (Test Data) (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Sun, 24 Aug 2014 03:33:55 -0400; Hi Tom, I also just went and changed the RF load resistor to 200 ohms and checked readings at various frequencies where the impedance was part reactive. I also added a 3rd part to the test in which I; /archives//html/Topband/2014-08/msg00239.html (9,730 bytes)
5. Re: Topband: Bias Tee Measurements (Test Data) (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Sun, 24 Aug 2014 10:52:54 -0400; Tom, you said "Any test is meaningless", and I don't understand where you are coming from on that statement. If you look at my test, I tested with and without the bias Tee, and I tested with a well r; /archives//html/Topband/2014-08/msg00240.html (12,722 bytes)
6. Re: Topband: Bias Tee Measurements (Test Data) (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Sun, 24 Aug 2014 11:41:19 -0400; Hi Tom, Thanks for the clarification, and I don't disagree with your most recent posting except I consider a well regulated supply to be one that has low ripple, but that might be where you and I wen; /archives//html/Topband/2014-08/msg00241.html (14,094 bytes)

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