Hi All
I bid a once on it but are not sure if my boat will handle the load. =
Period and weight wise, I am very happy with the performance the two =
SMT8 type verticals STM described.=20
Regards
Barry
----- Original Message -----=20
From: meredithlamb=20
To: psn-l@.................
Sent: Tuesday, November 12, 2002 5:28 PM
Subject: Re: Sprengnether 201 Long-Period Vertical Seismometer on EBay
Hi Tom and Jack, and all,=20
When new this unit probably were sold to the USGS (NEIC)=20
for 5K or thereabouts, as a wild guess; whereas the horizontals=20
were likely around 3k (alot less mechanically complicated than=20
the vertical). Going further, some of the newer style Broad-band=20
type seismo's get alot higher in price anymore.....=20
Jack, they were originally made for around a 30 second=20
period; but over time it was determined they were too=20
unstable (drifting); hence, they are usually operated at ~=20
15-20 seconds. (previous Sean-Thomas Morrissey note)=20
One can email the seller per the E-Bay item site, where it=20
states "ask seller a question".=20
I'd guess its locked in place now; but they don't show the=20
front of the seismo, where normally there is a locking pin hole.=20
See:=20
http://www.geocities.com/meredithlamb/page028.html=20
There is also clamping pin/s on the rear through the clamping=20
blocks. See:=20
http://www.geocities.com/meredithlamb/page026.html=20
Its possible their is no pins for the holes with the=20
unit, but a suitable rod/drill/s could be used also.=20
One can take a sufficient size hex wrench to remove the lead=20
mass weights holding screws through the hole on the side of the=20
frame (centered when locked with the pin/s). I'd strongly=20
suggest the mass weights be removed before shipping, and the=20
locking pins installed.=20
The picture also shows a DC motor on the boom for remotely=20
centering/adjusting the mass position. That motor, may or may=20
not be in working order....being ~40-50 years old now.=20
Sean-Thomas Morrissey (deceased) once successfully converted=20
one of their St. Louis University same item vertical instruments=20
into a broad-band unit; which is still working there I hope.=20
Take care, Meredith Lamb=20
Thomas W Leiper wrote:=20
Yes, I bid $1600 on it... Tom On Tue, 12 Nov 2002 16:51:47 -0500 =
Jack Ivey writes:=20
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 All
I bid a once on it but are not =
sure if my=20
boat will handle the load. Period and weight wise, I am very happy with =
the=20
performance the two SMT8 type verticals STM described. =
Regards
Barry
----- Original Message -----
From:=20
meredithlamb
Sent: Tuesday, November 12, =
2002 5:28=20
PM
Subject: Re: Sprengnether 201 =
Long-Period=20
Vertical Seismometer on EBay
Hi Tom and Jack, and all,=20
When new this unit probably were sold to the USGS (NEIC)
for 5K =
or=20
thereabouts, as a wild guess; whereas the horizontals
were =
likely=20
around 3k (alot less mechanically complicated than
the =
vertical). =20
Going further, some of the newer style Broad-band
type seismo's =
get alot=20
higher in price anymore.....=20
Jack, they were originally made for around a 30 second
period; =
but over=20
time it was determined they were too
unstable (drifting); hence, =
they are=20
usually operated at ~
15-20 seconds. (previous Sean-Thomas =
Morrissey note)=20
One can email the seller per the E-Bay item site, where it =
states "ask=20
seller a question".=20
I'd guess its locked in place now; but they don't show the =
front of the=20
seismo, where normally there is a locking pin hole.
See:
http://www.ge=
ocities.com/meredithlamb/page028.html=20
There is also clamping pin/s on the rear through the clamping =
blocks.=20
See:
http://www.ge=
ocities.com/meredithlamb/page026.html=20
Its possible their is no pins for the holes with the
unit, but =
a=20
suitable rod/drill/s could be used also.=20
One can take a sufficient size hex wrench to remove the lead =
mass=20
weights holding screws through the hole on the side of the
frame =
(centered=20
when locked with the pin/s). I'd strongly
suggest the mass =
weights=20
be removed before shipping, and the
locking pins installed.=20
The picture also shows a DC motor on the boom for remotely=20
centering/adjusting the mass position. That motor, may or =
may=20
not be in working order....being ~40-50 years old now.=20
Sean-Thomas Morrissey (deceased) once successfully converted =
one of=20
their St. Louis University same item vertical instruments
into a=20
broad-band unit; which is still working there I hope.=20
Take care, Meredith Lamb=20
Thomas W Leiper wrote:=20
Yes, I bid $1600 on it... Tom On Tue, =
12 Nov=20
2002 16:51:47 -0500 Jack Ivey <ivey@..........> writes:=20
Hi all,I'm =
debating if I=20
want another boat anchor. Do we=20
know what period it is?Does anyone=20
know how to tell this guy to lock the mass for =
shipping?Also, is anyone bidding on =
it? Thanks,Jack
<=
/BLOCKQUOTE>