[Hammarlund] HQ180 main tuning

[Al Parker]

Hi,
    I agree, it sounds like a wiper problem rather than cap plates 
contacting.  I've had the same problem many times, DeOxit on those wipers is 
std procedure here whenever working on anything new.  Have had it in 
SP-600's, and this wk an HQ-180 (do it for both caps).  If it were the cap 
plates it'd be very noisy, with loss of signal, not just freq. jumping.
73,
Al, W8UT
New Bern, NC
www.boatanchors.org
www.hammarlund.info

"there is nothing -absolutely nothing- half as much worth doing as simply 
messing about in boats."
   Ratty, to Mole


----- Original Message ----- 
From: "Tom NØJMY - AAR7FV" <tfarl at mchsi.com>
To: <judyt732 at sbcglobal.net>
Cc: <hammarlund at mailman.qth.net>
Sent: Sunday, December 07, 2008 1:47 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


------------------------------------------------------------------------------


  _______________________________________________
  List Administrator: Duane Fischer W8DBF
  ** For Assistance: dfischer at usol.com **
  ----
  http://mailman.qth.net/mailman/listinfo/hammarlund



--------------------------------------------------------------------------------


> _______________________________________________
> List Administrator: Duane Fischer W8DBF
> ** For Assistance: dfischer at usol.com **
> ----
> http://mailman.qth.net/mailman/listinfo/hammarlund
>