[Amps] 3rd Order IMD

[David C. Hallam]

As much as I believe Hallicrafters and Johnson are well designed transmitters, I don't believe they use NFB in their finals.  The equipment at my QTH is exclusively boat anchor.

David
KC2JD
  -----Original Message-----
  From: Peter Chadwick [mailto:g3rzp at g3rzp.wanadoo.co.uk]
  Sent: Thursday, September 22, 2005 2:04 PM
  To: R.Measures; dhallam at rapidsys.com
  Cc: Amps at Contesting. Com
  Subject: Re: [Amps] 3rd Order IMD


  Rich said:



  >Because 6146 amps typically use RF-NFB, the total IMD is c. –38db from 
  >pep.

  Caveat: Well designed 6146 amps use NFB. Not all of them do.....



  73



  Peter W6/G3RZP (San Diego this week).