Results are presented for the behavior of a commercial de SQUID couple
d via a superconducting transformer to a high Q electrical resonator.
The LC resonator is composed of a low losses superconducting coil of 0
.28H and a PTFE capacitor of 100 nF. The resonator operates at nu(0) s
imilar or equal to 1 kHz with a quality factor Q similar or equal to 1
.2x10(6). The effect of the SQUID on Q and nu(0) of the resonator as f
unction of the applied dc flux is measured.