[ARC5] C-30 missing...

[Michael A. Bittner]

Or Middletown, OH on 223 kHz.
  ----- Original Message ----- 
  From: D C _Mac_ Macdonald 
  To: W7EKB Ken Gordon ; ARC-5 Mail List 
  Sent: Monday, October 29, 2012 4:38 PM
  Subject: Re: [ARC5] C-30 missing...



  NDB (non-directional beacon) MW is named 
  Pelly NDB and is at Moses Lake, WA. 
   
  Info at: http://www.pilotnav.com/navaid/faa-2547
    
  * * * * * * * * * * * 
  * 73 - Mac, K2GKK/5 * 
  * (Since 30 Nov 53) * 
  * k2gkk at hotmail.com * 
  * Oklahoma City, OK * 
  * USAF & FAA (Ret.) * 
  * * * * * * * * * * * 
   
   
   

  > From: kgordon2006 at frontier.com
  > To: Arc5 at mailman.qth.net
  > Date: Mon, 29 Oct 2012 15:38:45 -0700
  > Subject: [ARC5] C-30 missing...
  > 
  > I am curious: in the previously-hacked BC-453B I am presently working on, 
  > C-30, the 15 mfd 35 VDC cathode-bypass capacitor for the 12A6 audio 
  > output tube is missing. Apparently the original hacker removed it but never 
  > put it back.
  > 
  > Even so, the audio output from this receiver is very loud. Plenty loud enough 
  > for a loudspeaker. I am using a 600 ohm to 8 ohm transformer feeding a 
  > Radio Shack small 4" square CB speaker. If I turn the RF gain all the way up, 
  > it will literally drive me out of the shack.
  > 
  > So, is that capacitor really needed?
  > 
  > I thought that if one removed that capacitor, some negative feedback would 
  > result, and the audio distortion would be reduced, but that the volume would 
  > be reduced also.
  > 
  > FYI, the B+ is 240 VDC under load.
  > 
  > I am copying an NDB, call is MW, here even in the daytime.
  > 
  > Ken W7EKB
         
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