Close but no cigar Pete! The P.E.C. 84-39 & 84-40 are 3 terminal devices while the 84 series in the catalog is a 4 terminal device. The circuit shown in the SB-610 manual shows a 5 cap, 4 resistor network but give no component values. I suspect that these were "special order" OEM devices and were not included in the catalog. Thanks Ron H. K3PID