Up grading an old push pull

[Frank the Troll]

Goiing to be up grading this old push pull to the modern world

Its a 125mm doublet in a 127mm tube (baffled)  tube lenght is 32 inches

 

[Frank the Troll]

First job on the list is to replace the existing push pull focuser

Whislt its fairly easy to focus on the moon, trying to focus on Jupiter is nigh on impossible

 

[Frank the Troll]

And this is what's going to replace the old focuser (Thank you YKSE)

This is from a SW120mm ED (Dual speed)

 

[Frank the Troll]

Now I just need some sort of adapter to fit the 96mm flange on the focuser to that of the tube

And very kindly   roblegion has offered to machine one for me, just as well, Im pants at that sort of stuff and don't have a lathe

Recycled pallet wood, now thats a different story, I make allsorts

 

 

[Frank the Troll]

The adapter needs to fit the 96mm flange along its lenght of 15mm with a thickness of 2mm and then step up to fit the ID of the tube at 125mm with enought depth to secure it

Refered by Rob as a donut

Now just need to wait

Watch this space

[nightfisher]

Looks to be a good and worth while project, im guessing its about f6.8, what maker is the lens?

[Frank the Troll]

8 minutes ago, nightfisher said:

Looks to be a good and worth while project, im guessing its about f6.8, what maker is the lens?

Theres no makers name anywhere on this scope, so havn't a clue

With the amount of travel of the draw tube to focus on the moon, it could be more than F6.8

But yes, its going to be very worth while

 

 

[Frank the Troll]

Well, while I wait for the adapter, the tube could well do with some touching up, so do I

a. Give it a nice new paint job

or

b. Put some carbon fibre wrap on it

[roblegion]

Frank, the billet should be here Sat-Monday.

[Frank the Troll]

34 minutes ago, roblegion said:

Frank, the billet should be here Sat-Monday.

Cheers Rob

Gives me time to tart up the tube and make it a bit more presentable

 

 

[philj]

A good project. Some makers pencil names or details on the sides of the objective, so if you ever take it apart there may be some evidence there.

Get yourself a nice long dew shield, that will dew up in record time as is.

[Frank the Troll]

18 hours ago, philj said:

A good project. Some makers pencil names or details on the sides of the objective, so if you ever take it apart there may be some evidence there.

Get yourself a nice long dew shield, that will dew up in record time as is.

Cheers, I will bear that in mind, but dont think that will be anytime soon (if it works, dont fix it)

Optics are pretty much in pristine condition considering the age

Currently have a home made dew sheild, bit naff but that will do for the moment,  but will make a longer one at some point, and match to the scope

[Frank the Troll]

Oh well.  A bit of bling it is then

Have ordered some carbon fibre

[Frank the Troll]

On 08/03/2016 at 15:34, philj said:

A good project. Some makers pencil names or details on the sides of the objective, so if you ever take it apart there may be some evidence there.

Took it apart, no name or details any where

Whislt it was apart, and waiting on an adapter for the new focuser, have now added some carbon fiber to the tube (Two tone purple/bronze)

Will need to rub down and then repaint the objective cell housing at some point, will keep the same colour theme and use a metalic purple or bronze I reckon would look better

Might have to do the Evo 90 in carbon too if I piggyback it on this

[roblegion]

Hi Frank, again sorry for delay due to illness.

 

IT'S ON ITS WAY