RF Circuits

The final stage of construction.

I built this for 80m and 40m and T3 and T4 are small and the windings tight.

In both cases the bifilar Secondary(T3) and the bifilar Primary (T4) are wound first with the single wire winding being added last. You may find this a little easier.

Now usually if this were a V6.2 or V6.3 I would have added a drop of heat sink compound to the PA transistors before adding the heatsink but a plastic TO220 washer was included so I used that.

The 2N2222A TO18 heatsink is removed in this photo.

I will run a few quick tests and then clean up the boards.

Until I do as asked for them here are some high resolution pictures of the completed boards.

With no flash:


Flash:


Underside: