AA9TT

Collins 75S-1 Filters

The Collins Radio S-Line filters developed as the S-Line products developed. The original 75S-1 included the small tubular "Y" style filter that was soldered into the circuit. When adding the 800 HZ CW filter, remember the offset crystal is also required. I learned this the hard way. I bought the filter to update the receiver and did not get the offset crystal with it OOPS (Click here to see). The filter to the left with a stamped on label is usually a filter for a transmitter application. The labeled filters are typical receiver applications of varying band pass. For reference these unit are 2.1" long. These are found in the early S-Line.

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