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   rec.audio.tubes      Tube-based amplifiers... that go to 11      52,877 messages   

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   Message 51,864 of 52,877   
   legg to All   
   Re: Harman Kardon FM100 - early version?   
   17 Aug 12 10:08:01   
   
   XPost: sci.electronics.repair   
   From: legg@nospam.magma.ca   
      
   On Tue, 31 Jul 2012 16:30:47 -0500, John Byrns    
   wrote:   
      
   >The "rumble filter" circuit in this tuner is sort of interesting.  Rather than   
   >inserting a low pass filter in the audio section, it changes the time constant   
   >of the AFC network, when the time constant is lowered more of the "rumble"   
   >frequencies are feedback cutting the low frequency audio response.  This means   
   >that the "rumble filter" won't work when the AFC is off.  Also the labeling   
   for   
   >the "ON" and "OFF" positions of the "rumble filter" switch appear to be   
   reversed.   
   >   
      
   Going......going.....   
      
   http://www.ebay.com/itm/300757745636?ssPageName=STRK:MESELX:IT&_   
   rksid=p3984.m1555.l2649   
      
   gone!   
      
   RL   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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