This is L2. Yes, it is a toroid wound coil.
It is referred to on p.8 of the BITX v.3B complete assembly manual. It is part of a Pi network feeding the gate of the IRF510 to better balance the impedance needs. This is seen in the schematic of the PA. The original idea came form Farhan in a new design for a power amplifier, which is also in the files section.
john
AD5YE
---In BITX20@..., <ka2rrz@...> wrote :
Yes vers 3b /3c power supply pcb he small one with the irf520
On Wednesday, January 11, 2017 4:34 PM, "iam74@... [BITX20]" <BITX20@...> wrote:
Which BITX pcb are you referring to? I think you were working with the v3.B from Sunil.
What is the reference designator?
john
AD5YE
