[Milsurplus] Narrow AM mech filter ?

[Dennis DuVall]

Well, yes, of course.  The question as I understood it, though, was “if one could have only have one filter for use on phone and CW what would be the narrowest BW one would choose.”  My immediate experience with the R-390A along with 60 years in the game suggested 2 kHz as I indicated.  

Dennis DuVall, W7QHO
Glendale

****************

> On Feb 1, 2016, at 4:58 AM, Bill Cromwell <wrcromwell at gmail.com> wrote:
> 
> Hi Dennis,
> 
> 2 kc bandwidth is usually an "SSB" bandwidth but we can recover one sideband of AM voice through one of those. Yes..it is getting "muffled" a little but is usable. The receive VFO would be tuned so that it falls just at the edge of the passband or..we can use "exhaulted carrier" by using the SSB BFO to substitute or compliment a diminished carrier. If there is adjacent channel interference on one sideband we can switch to the other sideband to get rid of it - perhaps to find interference from a different station <evil grin>. This approach is not good for listening to hi-fi music. I abuse my "SSB" receivers this way sometimes.
> 
> 73,
> 
> Bill  KU8H
> 
> 
> On 02/01/2016 03:32 AM, Dennis DuVall wrote:
>> On my R-390-A I find that the 2 kHz filter used when receiving AM voice gives severely restricted but still intelligible  reception.  Wouldn’t want to use anything much narrower.
>> 
>> Dennis D.  W7QHO
>> Glendale, CA
>> 
>> 
> 
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