RARE SUPER SELECTIVE SWAN SS-16B INTERMEDIATE FREQ. FILTER FOR MANY SWAN RADIOS

Description

... RARE SUPER SELECTIVE SWAN SS-16B INTERMEDIATE FREQ. FILTER FOR MANY SWAN RADIOS
VERY RARE SUPER SELECTIVE SWAN SS-16B 5.5MHz INTERMEDIATE FREQUENCY FILTER FOR MANY SWAN RADIOS
Photos are the actual SWAN SS-16B Filter Serial No. 7440
One photo shows the filter mounted in a Swan 700CX transceiver (radio not included).
The SS-16/B (Super Selective, 16 crystals) IF filter is a highly selective version of the standard encapsulated 8- crystal filter design. It was available as an option for both 5.173-MHz and 5.5-MHz IF transceiver models. The SS-16B version of this filter was introduced in mid 1971. The SS-16 sold for ~ in February 1971 while the SS-16B sold ~ in September 1973. This encapsulated filter has the same footprint as the standard 8 crystal filter, but at 2¾" high, it’s just over double the height of that unit – it may be two stock filters cascaded and encased in one shell, probably with some minimal matching network between them to obtain 16-crystal design out of two stock 8-crystal filters.
This filter was factory installed on some units during production and marketed as a special version of a particular transceiver model (e.g. 500CX, 700CX), installed as a factory upgrade, and sold as a kit for user installation. When installed at the factory during transceiver assembly, Swan not only affixed a SS-16 Special (or SS-16B for the later version) plaque under the VFO tuning dial, but it also appears that transceiver serial numbers on such factory-installed units begin with a SS designation.
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