[Hammarlund] HQ180 main tuning

[Guido Santacana]

This procedure solved a similar problem that I had in an SX28.

Best,
Guido KP4FAR
  ----- Original Message ----- 
  From: Tom NØJMY - AAR7FV 
  To: judyt732 at sbcglobal.net 
  Cc: hammarlund at mailman.qth.net 
  Sent: Sunday, December 07, 2008 2:47 PM
  Subject: Re: [Hammarlund] HQ180 main tuning


  Not sure of any trick, but I wanted to mention another possibilty.  

  I had an SP-600 that behaved the same way after a lengthy storage period.  I found there are wipers that ride on little rings on the capacitor shafts.  At the ends of each section.  They can get dust or crud on them that is sometimes invisible to the naked aye, yet it can disrupt the tuning.  

  A little shot of cleaner-lube tamed mine right down.   I hope yours is that simple.

  73 es GL,
  Tom

  From: judyt732 at sbcglobal.net 
    To: hammarlund at mailman.qth.net 
    Cc: MIKE TAYLOR 
    Sent: Saturday, December 06, 2008 3:53 PM
    Subject: [Hammarlund] HQ180 main tuning


    Hi all..I've returned to Illinois after a six year hiatus in Florida. My HQ180 has sat on a shelf in a heated/air conditioned home while I was away. I turned it on last night and it works, although it needs some alignment after being moved by others a couple of times. The main tuning "jumps" on the three highest bands through the middle portion of the tuning range. Rocking the main
    tuning knob back and forth causes a station to jump up and down two to three KHZ's, making tuning in a station very difficult. (I have to use the bandspread.) No mounting or cold solder problems with the main tuning capacitor assembly. However it looks like one or two of the variable plates might be dragging against the fixed plates. This is in the section closet to the front panel. Anyone know of a tool or any tricks to straighten the plates?  Thanks, 73's...Mike


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