Reply to "Correlator Noise floor inflation by Legacy Signal Interfering with DCS"

rad400OGR Forum Member

gunrunnerjohn posted:
I have to wonder how valid those readings are. The reason I mention this is that the TMCC Buffer uses a series .22uf blocking capacitor on the output, see below. If this were trying to drive 25uf, that's a 100:1 ratio, there wouldn't be any signal at all on the track! Of course, it would be even worse with the Legacy base direct to the tracks, they don't have nearly the drive capability of the TMCC Buffer.

I will take readings again next week when I am at the club again. I was using a Fluke 189 meter and took several readings around the layout, to capture different TIUs and all the readings read in uf.

I took my measurements between outside rail and center rail, but when I was rereading Adrain's post above he talks about an outside reading and a center rail reading (At AGHR we got 74.8nF outside rail and 58.6nF center rail), are these reading referenced to earth ground?

7/19/188:30 PM

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