Tc1-1-13ma+

Projects LimeSDR
1

I am trying to identify an issue with my Limesdr-usb. When looking at the V1.4 schematic, the TC1-1-13MA+ shows as a center tapped primary. The datasheet shows there is no center tap. Should I just use the TC1-1-13MA+, or was it changed in the production run? Take TX1_1 for example. It clearly shows a center tapped primary. Trying to diagnose low power out & cannot make correct measurements.

Thank you,

Ed

2

Tagging @Zack

3

The symbol for TC1-1-13MA+ has been initially reused from another Mini-Circuits part which has the same physical pin count. For TC1-1-13MA+ pin 2 is unconnected to the coil and is just grounded to avoid floating. And yes, TC1-1-13MA+ doesn’t have a center tap, so, basically, pin 2 is just grounded.