[Milsurplus] [3890_AM] RAK / RAL Receivers: Couple of tips.

[arc5 at ix.netcom.com]

Just meant to be a joke, Mike. I listen too, but I heard someone say that the other day and I thought it was funny.------ Original message------From: Mike - WZ5Q wz5q at wz5q.net [3890_AM]<3890_AM at yahoogroups.com>Date: Mon, Jun 17, 2019 8:07 AMTo: 3890_AM at yahoogroups.com;boatanchors at mailman.qth.net;milsurplus at mailman.qth.net;Cc: Subject:Re: [3890_AM] RAK / RAL Receivers: Couple of tips.
 



  


    
      
      
      
  
  
    If one wishes to 
      listen to Rash Windbaugh on the BCB, perhaps
      one could bypass the audio filters.
    
    Now why did you have to go and ruin an otherwise fabulous technical
    article and review with your bias?
    Disappointing.
    
    73
    Mike
WZ5Q
    On 6/17/2019 7:18 AM, 'David Stinson'
      arc5 at ix.netcom.com [3890_AM] wrote:
    
    
      
       
      
          
            Been cleaning and reviving a WWII Navy RAK
              receiver
              which is going to Jim Sargent's next auction in
              July.
              The beautiful old beast has been patiently waiting
              its
              turn for about 25 years (I have another I mean to
              keep).
              De-Ox-it and lubricate,
              work over the grounds, then powered and it came
              right
              up with no issues. 180V B+ plays with about 25mA
              current.
              Amazing machine; like opening a tomb that's been
              sealed 
              for millennia, then the occupants sits-up and
              says: "Good Morning!"
              
              Those of us who know the RAK/RAL are familiar with
              
              them know this, but for those who have yet to
              light one up:
              The "headphone" jack on the front of the radio
              is NOT for the regular, single-circuit headphone
              or for a matched, ground-returned speaker.
              The audio output of these receivers is balanced
              with a center-tap on the Audio Output transformer
              secondary grounded. If you plug-in a
              single-circuit
              headphone with one side to the tip and one
              side to the ground, you're shorting-out half of
              the audio output secondary.
              Why RCA snuck this "land mine" in to hoist
              the unwary is a mystery.
              So use a three-circuit plug if using the
              front-panel jack.
              
              An AM signal, like on the BCB, will sound
              bassy and "distorted." Like a certain famous
              person is reported to have said:
              "This isn't a "bug," it's a "feature."
              The RAK/RAL are optimized as CW receivers and
              they excel at this, if one does not rail
              the Sensitivity control. If one wishes to 
              listen to Rash Windbaugh on the BCB, perhaps
              one could bypass the audio filters.
              
              Anyone else want to add some good info
              on resurrecting the RAK/RAL?
              
              GL OM ES 73 DE Dave AB5S
              
            
          
          
      
      
      
      
    
    
  



    
     

    
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        Posted by: Mike - WZ5Q >        
     
     

    
      
        
          
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