Re: [TenTec] Preselectors for SDR

["Jim M." <n4be_jim@yahoo.com>]

The engineers at Collins knew the value and need for good receiver Preselectors 
when they designed the R-390 family in the 50's and 60's. A bank of tuned 
circuits mechanically track received frequency via mechanical gears and cams. 
Still one of the best performing HF receivers around. 

Jim N4BE

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