700 Hz Roofing filter for Model 539 Transceiver.  This filter plugs in.  No soldering is required.

Center Frequency (MHz) +/- 50Hz MAX  ----------  9.000470

Bandwidth @ -6dB (Hz) MIN. +/- 6% --------- 740 Hz

Number of Poles -------- 4

Insertion Loss (dB) MAX -------- 4.5db +-10%

Ultimate Attenuation (dB) -------- >70

Pass Band Ripple  (dB) -------- (+/-) 1.0

Termination (OHM/pf)  --------- 200/0

Operating Temperature --------- 0-50 DEG.C

Enclosure -------- 4 PIN PCB  Non-Shielded