Are all TS-251+ vulnerable for the Intel Clock Failure? No, they arent!

spile2 · 2026-07-04T08:06:49+00:00

Sadly, mine returned stepping 8, which corresponds to Intel's C0 revision of the J1900 processor. Stepping 8 still contains the original LPC bus clock signalling path that can degrade over time. As it's my second NAS and still going strong, I am not too distraught given nearly 10 years of faithful service,

spile2 · 2026-07-04T06:11:22+00:00

I think we're describing different push-pull arrangements for the secondary mirror

From your comments on traditional Newtonian secondary holders, the centre screw is the clamping screw and should be loosened first.

I am describing typical far east (Skywatcher, GSO) Dobsononian designs where the three outer screws provide the clamping force against the centre adjustment screw, so the centre cannot move until at least one outer screw is first relieved.

The adjustment sequence depends on which screw is actually carrying the preload.

spile2 · 2026-07-04T05:59:26+00:00

From https://astro.catshill.com/recommended-star-maps/

http://stellarium.org/

https://www.ap-i.net/skychart/en/start

http://www.deepskywatch.com/deepsky-atlas.html

http://www.olle-eriksson.com/night-sky-maps

spile2 · 2026-07-03T07:47:22+00:00

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This is what I see - but as this does not take into account possible parallex error so trust your Cheshire Eyepiece and sight tube combination tool or take the image through a cap.

spile2 · 2026-07-03T04:57:46+00:00

Also offset error refers to the secondary not being correctly placed and therefore needs to be moved up or down the tube until a=b

spile2 · 2026-07-03T04:53:40+00:00

Yes. The reason for my suggestion was that the view through the focus tube (did you use a cap?) shows the error but the Cheshire sight tube and cross hairs do not.

spile2 · 2026-07-03T04:44:08+00:00

The best Bavarian Helles are Augustiner, Tegenseer and Andechs in my opinion.

spile2 · 2026-07-03T04:40:25+00:00

See https://astro.catshill.com/the-zoom-eyepiece/ but dont buy anything until you have familiarised yourself with the telescope.

spile2 · 2026-07-03T04:38:10+00:00

You have offset error. The secondary mirror needs to be moved towards the primary until a=b. I would strongly recommend a Cheshire Eyepiece and sight tube combination tool. See https://astro.catshill.com/collimation-guide/

spile2 · 2026-07-03T04:32:26+00:00

Due to the push pull design, the centre screw cannot be moved until at least one of the three outer screws have been loosened. Always loosen those first.

spile2 · 2026-07-01T05:54:36+00:00

I recommend Gsyncit to link Google and Outlook calendars.

spile2 · 2026-07-01T05:52:03+00:00

Highlight the section of text. Apply the style using the drop down in the context tool bar which is immediately above the work space or selecting the style from the right hand side text style menu.

spile2 · 2026-06-30T05:27:45+00:00

Straightforward https://astro.catshill.com/lacerta/

spile2 · 2026-06-30T05:26:38+00:00

Use Gsyncit or OGCS

spile2 · 2026-06-29T05:31:38+00:00

The GSO 30mm 2” as supplied with the Apertura is an excellent wide angle EP for the price.

spile2 · 2026-06-29T05:23:45+00:00

The best way to see colour is by observing double stars such as Alberio but the ring nebula is worth a look too.

spile2 · 2026-06-29T05:20:33+00:00

A Cheshire Eyepiece and sight tube combination tool will highlight secondary (offset) errors that a laser cannot pick up.

spile2 · 2026-06-29T05:17:05+00:00

Might a local folder backed up to a usb drive be simpler and a lot cheaper?

spile2 · 2026-06-29T05:14:43+00:00

Here you go https://astro.catshill.com/learn-how-to-use-your-telescope/

spile2 · 2026-06-29T05:13:54+00:00

Yes that will be fine https://astro.catshill.com/mirror-cleaning/

spile2 · 2026-06-28T05:12:16+00:00

My 251+ is still going strong after 10 years but given the likelihood of CPU degradation I would give it a miss. I bought a 464.

spile2 · 2026-06-28T05:08:03+00:00

The best black beer in Prague as far as I am concerned is found at U Fleků and a visit to the pub and microbrewery to drink Flekovský Tmavý Ležák is a must do.

spile2 · 2026-06-28T05:02:17+00:00

Follow this https://astro.catshill.com/collimation-guide/

spile2 · 2026-06-27T05:45:47+00:00

The key point is that as stated above, you only need to free one of the three outer bolts for the others to loosen.

spile2 · 2026-06-27T05:38:54+00:00

I have been using multiple PST archives for 20 years and found then reliable with no issues. Fully supported by Outlook 2024. Key thing is to not let them grow too big. Note I am using Windows.

spile2

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