Hi Tom and Jack, and all,

When new this unit probably were sold to the USGS (NEIC)
for 5K or thereabouts,  as a wild guess; whereas the horizontals
were likely around 3k (alot less mechanically complicated than
the vertical).  Going further, some of the newer style Broad-band
type seismo's get alot higher in price anymore.....

Jack, they were originally made for around a 30 second
period; but over time it was determined they were too
unstable (drifting); hence, they are usually operated at ~
15-20 seconds. (previous Sean-Thomas Morrissey note)

One can email the seller per the E-Bay item site, where it
states "ask seller a question".

I'd guess its locked in place now; but they don't show the
front of the seismo, where normally there is a locking pin hole.
See:
http://www.geocities.com/meredithlamb/page028.html
There is also clamping pin/s on the rear through the clamping
blocks. See:
http://www.geocities.com/meredithlamb/page026.html
Its possible their is no pins for the holes with the
unit, but a suitable rod/drill/s could be used also.

One can take a sufficient size hex wrench to remove the lead
mass weights holding screws through the hole on the side of the
frame (centered when locked with the pin/s).  I'd strongly
suggest the mass weights be removed before shipping, and the
locking pins installed.

The picture also shows a DC motor on the boom for remotely
centering/adjusting the mass position.  That motor, may or may
not be in working order....being ~40-50 years old now.

Sean-Thomas Morrissey (deceased) once successfully converted
one of their St. Louis University same item vertical instruments
into a broad-band unit; which is still working there I hope.

Take care, Meredith Lamb

Thomas W Leiper wrote:

>  Yes, I bid $1600 on it... Tom On Tue, 12 Nov 2002 16:51:47 -0500 Jack
> Ivey  writes:
>
>      Hi all,I'm debating if I want another boat anchor. Do we
>      know what period it is?Does anyone know how to tell this guy
>      to lock the mass for shipping?Also, is anyone bidding on
>      it? Thanks,Jack
>


Hi Tom and Jack, and all,
When new this unit probably were sold to the USGS (NEIC)

for 5K or thereabouts,  as a wild guess; whereas the horizontals

were likely around 3k (alot less mechanically complicated than

the vertical).  Going further, some of the newer style Broad-band

type seismo's get alot higher in price anymore.....
Jack, they were originally made for around a 30 second

period; but over time it was determined they were too

unstable (drifting); hence, they are usually operated at ~

15-20 seconds. (previous Sean-Thomas Morrissey note)
One can email the seller per the E-Bay item site, where it

states "ask seller a question".
I'd guess its locked in place now; but they don't show the

front of the seismo, where normally there is a locking pin hole.

See:

http://www.geocities.com/meredithlamb/page028.html

There is also clamping pin/s on the rear through the clamping

blocks. See:

http://www.geocities.com/meredithlamb/page026.html

Its possible their is no pins for the holes with the

unit, but a suitable rod/drill/s could be used also.
One can take a sufficient size hex wrench to remove the lead

mass weights holding screws through the hole on the side of the

frame (centered when locked with the pin/s).  I'd strongly

suggest the mass weights be removed before shipping, and the

locking pins installed.
The picture also shows a DC motor on the boom for remotely

centering/adjusting the mass position.  That motor, may or may

not be in working order....being ~40-50 years old now.
Sean-Thomas Morrissey (deceased) once successfully converted

one of their St. Louis University same item vertical instruments

into a broad-band unit; which is still working there I hope.
Take care, Meredith Lamb
Thomas W Leiper wrote:
 Yes, I bid $1600 on it... Tom On Tue, 12 Nov
2002 16:51:47 -0500 Jack Ivey <ivey@..........>
writes:
Hi
all,I'm debating if I want another
boat anchor. Do we know what
period it is?Does anyone know how
to tell this guy to lock the mass for shipping?Also,
is anyone bidding on it? Thanks,Jack