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    R: Re: C. Plath Bubble Horizon
    From: Federico Rossi
    Date: 2008 Aug 11, 08:42 +0200

    Rick,
    some years ago I owned a Plath bubble horizon that I later sold on eBay.
    Among my nav files I've found this instruction manual that someone emailed
    me.
    I'm attaching it, hope it can help you.
    Federico
    
    -----Messaggio originale-----
    Da: NavList@fer3.com [mailto:NavList@fer3.com] Per conto di
    Richard B. Emerson
    Inviato: lunedì 11 agosto 2008 2.04
    A: NavList@fer3.com
    Oggetto: [NavList 6106] Re: C. PLATH BUBBLE HORIZON
    
    
    Bump - I'm still looking for some help with the points raised below.
    
    Rick Emerson
    S/V One With The Wind
    
    RBEmerson wrote:
    > I'd like to branch this topic and ask about the older "full monty"
    > Plath bubble horizon.  I have one and I've got some questions about
    > it.
    >
    > First, the rubber around the eyepiece (call it an eyecup, I guess) is
    > basically on its way out (dried out and crumbling along a part of the
    > edge) - can anyone recommend a reasonable (good fit and costs less
    > than a new sextant ;-) ) replacement?  Second, except with the solar
    > filter over the objective, the bubble is simply too dim to be seen
    > when shining a bright LED flashlight down through the opening for the
    > bulb.  Even then, the image is very dim.  Advice on living with the
    > bubble horizon, in general, is welcome (anyone got a PDF of the
    > instructions?).  (The battery compartment in my Plath still needs
    > help, thanks to a less than attentive prior owner - hence the test
    > with a flashlight)
    >
    > I bought the unit as part of a sextant sold on eBay some time ago
    > (well over 5 years ago at least).  In retrospect, this may have been
    > something of a con job gone wrong as the sextant may well have been
    > the Soviet SNO/CHO clone, sold as a Plath (what did I know?), but the
    > bubble horizon is a for-real Plath horizon, bought for peanuts (I sold
    > the sextant and the buyer didn't gripe - no hurt, no foul, I guess).
    >
    >
    > On Jul 3, 5:24 pm, Ken Gebhart  wrote:
    >   
    >> Joel,
    >>
    >> About five years before C. Plath went out of production (say 6 years
    >> ago?), they came out with abubblechamber which did not have the
    >> adjusting mechanism. As I recall, it had an internal battery, and did
    >> not rely on the batteries in the sextant handle.  I also seem to
    >> recall that the light had no adjustable rheostat either.  I asked
    >> them why they omitted these desirable features.  They replied that
    >> they were made to milspec, and that's what the specs said.  They were
    >> very expensive too, about $1700.  I believe this is the unit you have.
    >>
    >> Their previous adjustable bubbles were very nice, and dated nearly
    >> back to WWII.  I don't know when they were discontinued.
    >>
    >> Ken Gebhart
    >> [...]
    
    
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