NR-FL4.0
FL-4.0 8 pole Crystal Filter for
Drake TR7/R7
Form factor that is compatible with the Drake filter boards. The 4.0K filter is designed to be used as a wide SSB filter or a narrow AM filter. Typical shape factor is 1.79 with an insertion loss of less than 6 dB
NR-FL2.8
The NR-FL2.8 8 Pole Craystal Filter has a form factor that is compatible with the Drake filter boards. The 2.8K filter is designed to replace the stock 2.3 kHz filter for ehanced audio bandwidth on both receive and transmit. Typical shape factor is 1.7 with an insertion loss of 4.5 dB
NR-FL1.8
FL-1.8K 8 pole Crystal Filter for Drake TR-7/R7
Form factor that is compatible with the Drake filter boards. The 1.8K filter offers a good compromise for a narrow SSB and wide CW filter. Can offer good adjacent channel QRM rejection when used in conjunction with the passband tuning feature of the radios. Typical shape factor is 1.8 with an insertion loss of less than 5 dB
NR-FL450
FL-450 8 pole Crystal Filter for Drake TR7/R7. Has a form factor that is compatible with the Drake filter boards. The 450 Hz filter offers a good narrow bandwidth choice for CW opertion under crowded band conditions. This filter has a shape factor of 2.0 or less and a typical insertion loss of less than 6 dB