[Hammarlund] Old Hammarlunds

[Les Locklear]

TMC did some as did Northern Radio and ITT Systems. All dual diversity modifications.

Les Locklear
Gulfport, Ms.
DX'ing Since '57








  ----- Original Message ----- 
  From: WILLIAM MARX 
  To: Hammarlund at mailman.qth.net 
  Sent: Tuesday, April 12, 2011 5:13 PM
  Subject: Re: [Hammarlund] Old Hammarlunds


  I haven't heard diversity mentioned often when talking about SP-600's.

  My Dual Diversity was converted by TMC in 1956. There is a tag inside with the 
  information.

  It appears to have been manufactured in 1952 from what I can tell. I guess the 
  military shipped them to TMC for conversions.

  Bill Marx W2CQ





  ----- Original Message ----
  From: rbethman <rbethman at comcast.net>
  To: Hammarlund at mailman.qth.net
  Cc: Glen Zook <gzook at yahoo.com>
  Sent: Tue, April 12, 2011 4:44:16 PM
  Subject: Re: [Hammarlund] Old Hammarlunds

  The SP-600 J, not JX came out in 1951 with no crystals.

  The first diversity version was done by Northern Radio. SP 600 J11 is 
  what the dataplate has on the turret cover.

  They have one heck of selectivity! One part non-crystal, then the 
  remaining is a variable crystal type.

  Bob - N0DGN

  On 4/12/2011 4:00 PM, Glen Zook wrote:
  > You have to remember that many of the SP-600 receivers used by the military 
  >were the JX- versions that could be crystal controlled as well as the tunable 
  >feature. Those JX- versions were usually used with crystal control for things 
  >like RTTY circuits.
  >
  > Glen, K9STH
  >
  > Website: http://k9sth.com

  ______________________________________________________________
  Hammarlund mailing list
  Home: http://mailman.qth.net/mailman/listinfo/hammarlund
  Help: http://mailman.qth.net/mmfaq.htm
  Post: mailto:Hammarlund at mailman.qth.net

  List Administrator: Duane Fischer, W8DBF
  ** For Assistance: dfischer at usol.com ** 


  This list hosted by: http://www.qsl.net
  Please help support this email list: http://www.qsl.net/donate.html

  ______________________________________________________________
  Hammarlund mailing list
  Home: http://mailman.qth.net/mailman/listinfo/hammarlund
  Help: http://mailman.qth.net/mmfaq.htm
  Post: mailto:Hammarlund at mailman.qth.net

  List Administrator: Duane Fischer, W8DBF
  ** For Assistance: dfischer at usol.com ** 


  This list hosted by: http://www.qsl.net
  Please help support this email list: http://www.qsl.net/donate.html