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Author Topic: Audio Filter for CW.  (Read 7970 times)
KD8IIC
Member

Posts: 152




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« Reply #15 on: July 16, 2013, 09:41:49 PM »

 The Heath Q Multiplier was indeed very popular and still largely available.Also you may consider the Drake 2 Line model speaker with the built in filters. 2BQ I think...Still a lot of them out there to buy. Circa early sixties too.  73
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