Geoff (and others), Sorry about the accidental blank message just sent.
I have an AstroCompass (but not readily accessible at the moment). If I remember correctly, one main knob (possibly the LHA mechanism you mention) operated very stiffly until I PUSHED IN ON THIS KNOB. It is spring loaded to prevent turning by mistake. -- Roger ----- Original Message ----- From: "Roger W. Sinnott" <rsinn...@post.harvard.edu> To: <thurs...@hornbeams.com>; "'Peter Mayer'" <peter.ma...@adelaide.edu.au>; "'Sundials'" <sund...@rrz.uni-koeln.de> Sent: Saturday, July 04, 2009 12:34 PM Subject: Re: Sundial compass on eBay > > ----- Original Message ----- > From: "The Thurstons" <thurs...@hornbeams.com> > To: "'Peter Mayer'" <peter.ma...@adelaide.edu.au>; "'Sundials'" > <sund...@rrz.uni-koeln.de> > Sent: Friday, July 03, 2009 12:45 PM > Subject: RE: Sundial compass on eBay > > >> Folks, >> >> Alerted by Peter's message below, I have just bought an ex-Air Ministry >> Astro Compass MkII from eBay. I have wanted one of these for a while so >> thanks to Peter for posting about it. The instrument seems to be in >> pretty >> good condition but the LHA mechanism is stiff to turn and I am wondering >> about attempting to free it. Before I blunder in, I should be grateful >> for >> any advice on: >> - what lies inside the LHA mechanism >> - whether I can just apply some WD-40 and hope it finds its way to the >> critical parts >> - whether I could disassemble it with any hope of putting it back >> together >> >> Best Wishes, >> >> Geoff --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
