[Boatanchors] Preselector & Elmac PMR-6a?

[LARRY PICARD]

Do you have the selectivity specs for this vintage receiver?  It is listed as a double/triple conversion superhet.  

I agree that a pre-selector will not give you much benefit unless there are selectivity or image rejection issues.  

These devices cannot improve the signal to noise ratio the input to receiver.  Unless the unit incorporates a low noise amplification stage, there is likely little to be gained.  



________________________________
 From: "Fuqua, Bill L" <wlfuqu00 at uky.edu>
To: "qrv at kd4e.com" <qrv at kd4e.com>; BoatAnchors <boatanchors at puck.nether.net> 
Sent: Monday, June 9, 2014 11:04:22 AM
Subject: Re: [Boatanchors] Preselector & Elmac PMR-6a?
 

If you can hear additional background noise when you connect the antenna, then probably no unless you 
have a problem with image rejection.
73
Bill wa4lav

________________________________________
From: Boatanchors [boatanchors-bounces at puck.nether.net] on behalf of qrv at kd4e.com [qrv at kd4e.com]
Sent: Monday, June 09, 2014 1:00 PM
To: BoatAnchors
Subject: [Boatanchors] Preselector & Elmac PMR-6a?

Would a preselector make enough of a difference
used with an Elmac PMR-6a to be bothered with?

Added selectivity and low-noise sensitivity
would be the intended goal - used in a fixed
rather than original-design mobile setting.

Thanks - David KD4E


--

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