Fourth experimental transformer was made with Four Cylinder Ferrite RF Chokes.
shows schematic of the transformer. It was classical RF Transformer
where one turn is primary and second turn is the secondary winding.
Then the transformer was tested. Primary winding was connected
to MFJ- 259B. Secondary winding was loaded on to 51- Ohm resistor.
Figure 11 shows the transformer
loaded to 51-Ohm resistor. Table 4 shows data obtained for the Four Ferrite
RF Chokes transformer.
As you can see from the table the transformer had parameters
better the one, two and three cylinder transformer. Certainly
the transformer may be used for receiving purposes. I tested the
transformer with my transceiver IC- 718 and receiver Hallicrafters
S- 85. Transformer worked good up to 160- meter Band. As well
the transformer performed well at MW band. Transformer was tested
with IC-718 in transmitting mode, 15- wt.
SWR showed by IC- 718 is close to SWR showed by MFJ- 259B.
RF Transformer on Four Cylinder Ferrite RF Chokes loaded
to 51- Ohm Resistor