PSN-L Email List Message
Subject: Re: SPRENGNETHER 201 LONG PERIOD VERTICAL SEISMOMETER
From: Dick Webb dwebb002@.............
Date: Wed, 20 Aug 2008 23:15:52 -0400
Actually they came with part number 990-09091-0101 which makes me think
they are real Sprengnether parts.
meredith lamb wrote:
> Hi Dick,
> Thanks for the dimensions of the springs you have on your vertical.
> Right off....I can't imagine springs with holes in them
> as being "the" original Sprengnether springs; mainly because I can't
> think of a need/use for the holes...unless the holes
> were some sort of crude visual positional indicators. Logically; it
> would seem that all 3 of us, are using "handy replacements"
> put therein by the previous owners. Its interesting that they all
> "work" to whatever degree; with the vertical/s.
> Take care, Meredith
> On Wed, Aug 20, 2008 at 3:57 PM, Dick Webb > wrote:
> Sorry, that was 0.4 to 0.5 mm thick. I only have a non digital
> old time mechanical micrometer.
> Dick Webb wrote:
> The dimensions are 0.05 mm thick by 6.3 mm wide and 4.5 cm
> long. Also, there are three holes at each end, the space
> between the central holes is 2.3 cm. It looks kind of like
> this: 000 000
> Hope this helps.
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