Our coils and transformers are designed to suppress parasitics (IP3, distributed capacitance,cross talk,etc.)while maintaining High Reliability, High Q and a Low Temperature Constant. This is the best place to start when designing Filter and Precise circuits for RF.
The Q3SMT Series inductors are available in the standard .445in high, (tuneable +/- 10%), or the flat top .42in high, (tuneable +/- 7%). Please specify the package height when ordering.
The inductance adjustment range of Q3 type coils was deliberately stated below the attainable values by mechanically adjusting capability, in order to keep Q variations below 7%. Of course a larger adjustment range is possible if Q variation is not of great importance to the circuit.
Inductance and Q of the HF coils were measured on the HP 4323A Q meter. Data was obtained by the use of soldered leads, in order to avoid errors due to contact resistance.
Please note that the VHF-UHF coil inductance is indicated in nanohenires. The HF portion of the listing is stated in microhenries.
Coil Q products are RoHS compliant.
Made in the USA since 1968.
Click here to download product specifications for Coil-Q Corp.'s complete line of Q3SMT-Series HF coils.