broadband transformer
gojamo wrote:
Can you connect a broadband rf transformer to a receiver front end tank
circuit rather than to a resistive load? The inductance of the side of
the transformer connected to the tank circuit would be several times
the inductance in the tank circuit, and changes to the overall
inductance (parallelled inductances) of the circuit would be taken
into account. Thanks
....sure you can. I think you noticed that sometimes the antenna is
connected to a tap on the inductor, thus creating an autotransformer.
The one thing to beware of is to make sure that the input impedance,
reflected through the transformer is high enough, so as not to load the
tuned circuit. it's NOT a match. If matched, the impedance of the
transformer's secondary would be equal to the tuned circuit's
impedance, thus lowering the Q of the tuned circuit to one half the
original value.
Saandy 4Z5KS
|