Heathkit SB-10 Series - SSB Filter 404-200 Circuit

ad.2. SSB Filter 404-200 Circuit
Figure 19. SSB Filter 404-200 Circuit
T1 total inductance = 65.5uH (resonates at 872.7KHz with 500pF).
Toroids have an outer diameter of 0.38inches and a thickness of 0.13inches. Material not known.
There was no evidence of any varnish on either toroid transformer which was surprising.
The internal crystal parameters are shown on the "Crystals for IF Filters" page on this web site.
Heathkit Filters Page 104