[TenTec] Preselectors for SDR

[Chris Howard w0ep]

Just for comparison,
what is the relative performance of the preselector in a Drake R4B or R4C?



On 9/17/2016 7:34 AM, Jim M. via TenTec wrote:
> 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
> 
> Sent from my iPad
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