[Test-Equipment] Make your own coil dope (WasRe:HP-606A Calibration question)

[Bill Smith]

Thank you for the suggestion to melt polystyrene peanuts with MEK!

Non-shrink (recommended) airplane fabric dope is available at hobby shops, though you may have to hunt for it.  It also "cures" or hardens once the jar has been opened and the dope exposed to air.  Thinner doesn't seem to help.

I have also used a paper glue-stick with good success with my last coil assemblies.  I'd prefer dope, but it had hardened and I was in a rush.  Paper glue is water soluble, don't know if that would affect coil performance, but it holds the coil together.  It is non-toxic, another strike against it.  :^p

73 de Bill, AB6MT
hbco2 at sbcglobal.net

  ----- Original Message ----- 
  From: Richard Knoppow 
  To: Discussion of Electronic Test Equipment 
  Sent: Tuesday, May 26, 2009 2:09 PM
  Subject: Re: [Test-Equipment] Make your own coil dope (WasRe:HP-606A Calibration question)



  ----- Original Message ----- 
  From: "Steve Byan" <stevebyan at comcast.net>
  To: "Discussion of Electronic Test Equipment" 
  <test-equipment at mailman.qth.net>
  Sent: Tuesday, May 26, 2009 2:02 PM
  Subject: Re: [Test-Equipment] Make your own coil dope (Was 
  Re:HP-606A Calibration question)


  >
  > On May 26, 2009, at 4:34 PM, Richard Knoppow wrote:
  >
  >>    I'll have to do a web search. I'm not even sure that
  >> polystyrene is the right stuff. I am told in another 
  >> e-mail
  >> that General Cement still makes Q-Dope. If so there will 
  >> be
  >> an MSDS for it. I remember seeing an article in some ham
  >> magazine of long ago about how to make your own.
  >
  > You can order it direct from GC Electronics, although it's 
  > expensive
  > to buy onsies direct from them. Go to 
  > <http://www.gcelectronics.com/>
  > and type "10-3702" into the search box.
  >
  > The GC Electronics MSDS says it's made from polystyrene 
  > synthetic
  > resin and Methyl Ethyl Ketone (MEK).
  >
  > --
  > Steve Byan
  > stevebyan at comcast.net
  >
       I just did a web search and found the same thing:-) 
  Great minds work alike!


  --
  Richard Knoppow
  Los Angeles
  WB6KBL
  dickburk at ix.netcom.com 

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