Hi James,

Everything is possible; and from your text some "seem" different.  You might
review the pictures on the following url, and confirm if its different:

http://www.geocities.com/meredithlamb/page029.html

There is pictures of the installed hinge/s on:

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

I presume you either have or have acquired a (~helpful) setup manuel, and
its totally understood?  Use the 3 brass (could be anything 1/4" in
diameter X ~2-3" in length) boom/frame locking pins...otherwise the boom can
rapidly move up/down/backward, and mulitiple damage can occur when the
hinges are loosened/removed.

For the coils wire and its breakable plastic form safety sake...gingerly
remove the two magnets prior to hinge removal also....damaged or ruined
coils would put it out of operation; and they aren't commercially
replaceable.  In a REAL sense the coils are the most precious parts of the
seismo.  The coil form and magnets are a tight fit; you will likely have to
gingerly align/move, lock it down only if their is absolutely no sensed or
sound from coil/magnet very slight boom frame movement rubbing contact.
Its also a opportunity to check and remove any debris
in the magnet; or remove any possible rust.

Don't rush anything uniformed or be mentally unprepared whatsoever ......if
it takes several days or more to do, thats fine.

Being as I've read nothing on the spring 0.025" wires condition....I presume
they are OK....thats a much tougher job to replace.

Take care, Meredith


On Fri, Aug 22, 2008 at 8:55 PM, JAMES ALLEN  wrote:

>  Meredith, Dick, Chris and others
> You mentioned and I have seen pictures of 201 vertical seismometers with a
> wire inserted in the back top adjustment mechanism.  However, I suppose mine
> is a little weird in that my upper spring adjustment screw has at the top a
> tension adjustment nut and a locking nut but at the screws lower end
> (without threads) an opening to directly accept the straight and flatten 1"
> piece of the spring.  There are two allen type screws to tighten the spring
> extension in this opening.  At the bottom end of the spring there is an
> approximately 2 1/2" straight  and flattened piece of the spring that is
> inserted into the lead mass assembly secured with two allen type screws.  I
> am going to be looking for feeler guages tomorrow to replace the wires that
> are currently being used as hinges as discussed in you guys previous
> threads.  However, I was wondering if any of you have the above described
> unconventional upper spring attachment like mine.  Also, doew anyone have a
> picture of the hinge metal used since the exploded view in the Sprengnether
> manual does not really show it clearly.
> James Allen
> James Allen
>
Hi James,

Everything is possible; and from your text some "seem" different.  You might review the pictures on the following url, and confirm if its different:

http://www.geocities.com/meredithlamb/page029.html



There is pictures of the installed hinge/s on:

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

I presume you either have or have acquired a (~helpful) setup manuel, and its totally understood?  Use the 3 brass (could be anything 1/4" in


diameter X ~2-3" in length) boom/frame locking pins...otherwise the boom can rapidly move up/down/backward, and mulitiple damage can occur when the hinges are loosened/removed.  

For the coils wire and its breakable plastic form safety sake...gingerly remove the two magnets prior to hinge removal also....damaged or ruined coils would put it out of operation; and they aren't commercially replaceable.  In a REAL sense the coils are the most precious parts of the seismo.  The coil form and magnets are a tight fit; you will likely have to gingerly align/move, lock it down only if their is absolutely no sensed or sound from coil/magnet very slight boom frame movement rubbing contact.   Its also a opportunity to check and remove any debris

in the magnet; or remove any possible rust.


Don't rush anything uniformed or be mentally unprepared whatsoever ......if it takes several days or more to do, thats fine.

Being as I've read nothing on the spring 0.025" wires condition....I presume they are OK....thats a much tougher job to replace.



Take care, Meredith


On Fri, Aug 22, 2008 at 8:55 PM, JAMES ALLEN <jcallen1@...........> wrote:









Meredith, Dick, Chris and others
You mentioned and I have seen pictures of 201 
vertical seismometers with a wire inserted in the back top adjustment 
mechanism.  However, I suppose mine is a little weird in that my upper 
spring adjustment screw has at the top a tension adjustment nut and a 
locking nut but at the screws lower end (without threads) an opening to 
directly accept the straight and flatten 1" piece of the spring.  There are 
two allen type screws to tighten the spring extension in this 
opening.  At the bottom end of the spring there is an approximately 2 
1/2" straight  and flattened piece of the spring that is inserted 
into the lead mass assembly secured with two allen type screws.  
I am going to be looking for feeler guages tomorrow to replace the wires that 
are currently being used as hinges as discussed in you guys previous 
threads.  However, I was wondering if any of you have the above described 
unconventional upper spring attachment like mine.  Also, doew anyone have a 
picture of the hinge metal used since the exploded view in the Sprengnether 
manual does not really show it clearly.
James Allen
James Allen