In the 75S-1 bottom view note the 455.800KHZ frequency offset crystal is installed to work with the 500 Hz. CW filter. In some cases these filters are sold without the offset crystal and the result is you will always be off frequency 800 HZ. .

[Home] [Collins] [Military] [National] [Hallicrafters] [Hammarlund] [Fun Stuff]

© Copyright AA9TT  All rights reserved.