Tension Springs

Has anyone modified their Dobsonian with something similar to the Orion
Correct Tension system? I have a Celestron Starhopper 11" and need to come
up with some kind of tension adjustments as balance while switching
eyepieces is an issue. What type of springs did you use and where did you
find them. How did you attach them to the scope? Any additional info or
pictures you could provide will be appreciated. Thanks.
John

Guess not.


"John Gordon" wrote in message
. ..
Has anyone modified their Dobsonian with something similar to the Orion
Correct Tension system? I have a Celestron Starhopper 11" and need to come
up with some kind of tension adjustments as balance while switching
eyepieces is an issue. What type of springs did you use and where did you
find them. How did you attach them to the scope? Any additional info or
pictures you could provide will be appreciated. Thanks.
John

Try a Google search.

Phil

John G wrote:
Guess not.


"John Gordon" wrote in message
. ..

Has anyone modified their Dobsonian with something similar to the Orion
Correct Tension system? I have a Celestron Starhopper 11" and need to come
up with some kind of tension adjustments as balance while switching
eyepieces is an issue. What type of springs did you use and where did you
find them. How did you attach them to the scope? Any additional info or
pictures you could provide will be appreciated. Thanks.
John

Try a Google search.

Phil

John G wrote:
Guess not.


"John Gordon" wrote in message
. ..

Has anyone modified their Dobsonian with something similar to the Orion
Correct Tension system? I have a Celestron Starhopper 11" and need to come
up with some kind of tension adjustments as balance while switching
eyepieces is an issue. What type of springs did you use and where did you
find them. How did you attach them to the scope? Any additional info or
pictures you could provide will be appreciated. Thanks.
John

Guess not.

If you go to a full service auto parts store like Napa they often have a
collection of springs. Someone with a 10 GS DOB could measure the coil
diameter, wire diameter and length for you and you could duplicate it most
likely.

I could do that if I were at home.. :-(

jon

"Jon Isaacs" wrote in message
...
Guess not.

If you go to a full service auto parts store like Napa
they often have a
collection of springs. Someone with a 10 GS DOB could
measure the coil
diameter, wire diameter and length for you and you could
duplicate it most
likely.

I could do that if I were at home.. :-(

jon


10" Deep Space Hunter Dob springs (2 needed):
Total length each = ~5". Each spring is made up of two
~3/4" circles (eyes?) at each end, perpendicular the the
planes of the coils, together with a centered ~3 1/2" long
coiled spring, ~3/4" o.d., with ~50 coils. Each spring
attaches to a peg protruding out from the center of altitude
axis. These then are streched downwards to attach to pegs
protruding from the sides of "rocker box"(?). Pegs center to
center distance when assmbled = ~7". No spell checker, be
gentle.

10" Deep Space Hunter Dob springs (2 needed):
Total length each = ~5". Each spring is made up of two
~3/4" circles (eyes?) at each end, perpendicular the the
planes of the coils, together with a centered ~3 1/2" long
coiled spring, ~3/4" o.d., with ~50 coils. Each spring
attaches to a peg protruding out from the center of altitude
axis. These then are streched downwards to attach to pegs
protruding from the sides of "rocker box"(?). Pegs center to
center distance when assmbled = ~7". No spell checker, be
gentle.

Good work.

The only thing missing from your nice description is the wire diameter, its
pretty critical in determining the stiffness of the spring.

If you don't have a set of calipers or a micrometer I will measure mine this
evening.

jon

"Jon Isaacs" wrote in message
...
10" Deep Space Hunter Dob springs (2 needed):
Total length each = ~5". Each spring is made up of two
~3/4" circles (eyes?) at each end, perpendicular the the
planes of the coils, together with a centered ~3 1/2"
long
coiled spring, ~3/4" o.d., with ~50 coils. Each spring
attaches to a peg protruding out from the center of
altitude
axis. These then are streched downwards to attach to pegs
protruding from the sides of "rocker box"(?). Pegs center
to
center distance when assmbled = ~7". No spell checker, be
gentle.

Good work.

The only thing missing from your nice description is the
wire diameter, its
pretty critical in determining the stiffness of the
spring.

If you don't have a set of calipers or a micrometer I will
measure mine this
evening.

jon

No way to measure. Strong spring, must use aids to stretch
(no hands/fingers only, for me). Maybe 3 1/2" divided by 50
would be in the ball park.

"Jon Isaacs" wrote in message
...
10" Deep Space Hunter Dob springs (2 needed):
Total length each = ~5". Each spring is made up of two
~3/4" circles (eyes?) at each end, perpendicular the the
planes of the coils, together with a centered ~3 1/2"
long
coiled spring, ~3/4" o.d., with ~50 coils. Each spring
attaches to a peg protruding out from the center of
altitude
axis. These then are streched downwards to attach to pegs
protruding from the sides of "rocker box"(?). Pegs center
to
center distance when assmbled = ~7". No spell checker, be
gentle.

Good work.

The only thing missing from your nice description is the
wire diameter, its
pretty critical in determining the stiffness of the
spring.

If you don't have a set of calipers or a micrometer I will
measure mine this
evening.

jon

No way to measure. Strong spring, must use aids to stretch
(no hands/fingers only, for me). Maybe 3 1/2" divided by 50
would be in the ball park.

10" Deep Space Hunter Dob springs (2 needed):
Total length each = ~5". Each spring is made up of two
~3/4" circles (eyes?) at each end, perpendicular the the
planes of the coils, together with a centered ~3 1/2" long
coiled spring, ~3/4" o.d., with ~50 coils. Each spring
attaches to a peg protruding out from the center of altitude
axis. These then are streched downwards to attach to pegs
protruding from the sides of "rocker box"(?). Pegs center to
center distance when assmbled = ~7". No spell checker, be
gentle.

Good work.

The only thing missing from your nice description is the wire diameter, its
pretty critical in determining the stiffness of the spring.

If you don't have a set of calipers or a micrometer I will measure mine this
evening.

jon