Search found 3253 matches

by Merlin66
Sat Apr 27, 2019 10:25 am
Forum: Solar Scope Modifications
Topic: help with stuck threads
Replies: 11
Views: 257

Re: help with stuck threads

Brian,
Not sure I can help at this stage.....
I’ve successfully use a smear of boot polish on all the treads before using them, It’s worked well for me for over ten years.
by Merlin66
Wed Apr 17, 2019 11:28 pm
Forum: This is SolarChat !!
Topic: I need a laptop that matches the speed of ZWO ASI174
Replies: 10
Views: 267

Re: I need a laptop that matches the speed of ZWO ASI174

Bart,
I should have said my ol' ACER didn't have USB3 ports.......
by Merlin66
Wed Apr 17, 2019 4:40 am
Forum: This is SolarChat !!
Topic: I need a laptop that matches the speed of ZWO ASI174
Replies: 10
Views: 267

Re: I need a laptop that matches the speed of ZWO ASI174

I had similar concerns with my ACER....
Bit the bullet and went for a MSI gaming machine,i7, 16Gb memory, USB3, 500 Gb SSD and 1 Tb data drive.
Handles my ASI 174 and ASI 1600 at max frame rate.
Recommended.
by Merlin66
Fri Apr 12, 2019 11:57 pm
Forum: Solar Scope Modifications
Topic: Tilt needed on a front ERF?
Replies: 2
Views: 228

Re: Tilt needed on a front ERF?

I mount the D-ERF with a 1 -1.5mm tilt.
That's usually enough to prevent issues.....
by Merlin66
Wed Apr 10, 2019 12:49 am
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 9
Views: 361

Re: Planning my first PST mod and need some help

Mauro, I have a write up available for the PST mod drop me an email address for a copy. A couple of critical things. The etalon assembly must be positioned 200mm inside focus. The etalon works in an f10 beam. If the donor scope is faster (f5) the aperture will be reduced. Adaptors, front and rear ar...
by Merlin66
Mon Apr 08, 2019 6:54 am
Forum: Solar Scope Modifications
Topic: Crazy Idea...?
Replies: 4
Views: 276

Re: Crazy Idea...?

Bob,
I like the idea!
Not sure how you would control/ achieve the nominal separation (gap) and maintain it...Temperature control is one avenue.....
by Merlin66
Tue Apr 02, 2019 1:54 am
Forum: Solar Scope Modifications
Topic: 150 mm Solar Newton
Replies: 46
Views: 1339

Re: 150 mm Solar Newton

First light is always exciting!!
Well done for getting reasonable result.
Onwards and upwards.
by Merlin66
Mon Apr 01, 2019 4:16 am
Forum: This is SolarChat !!
Topic: SPICULAES by PROs
Replies: 8
Views: 315

Re: SPICULAES by PROs

Valery,
One issue it the ability to accurately tune the filter into the wings, at known and repeatable wavelength off set.
With a Spectroheliograph this is much easier and more accurate.
by Merlin66
Thu Mar 28, 2019 10:43 pm
Forum: This is SolarChat !!
Topic: OT - March 2018 S&T wanted
Replies: 3
Views: 155

Re: OT - March 2018 S&T wanted

Franco,
Many thanks. PM sent.
by Merlin66
Wed Mar 27, 2019 10:37 pm
Forum: This is SolarChat !!
Topic: OT - March 2018 S&T wanted
Replies: 3
Views: 155

OT - March 2018 S&T wanted

Seeking some help.
I've been collecting S&T for many years and now have them back to Vol 1, #1
For some reason, MARCH 2018 issue appears to be missing......
I'm looking for a clean, complete copy.
If you can assist let me know.
Many thanks,
ken
100_3560.JPG
100_3560.JPG (111.74 KiB) Viewed 155 times
by Merlin66
Mon Mar 25, 2019 4:14 am
Forum: This is SolarChat !!
Topic: More aperture please (PST)
Replies: 19
Views: 705

Re: More aperture please (PST)

Christopher,
You seem to have ended up with distinct banding across the whole disk????
by Merlin66
Mon Mar 25, 2019 4:10 am
Forum: Solar Software
Topic: New version of ImPPG
Replies: 6
Views: 281

Re: New version of ImPPG

Alexandra,
Just downloaded the latest version and it works OK for me...
Video settings??
by Merlin66
Sun Mar 10, 2019 9:12 pm
Forum: Solar Scope Modifications
Topic: PST Mod Reflections back off the Blocking Filter
Replies: 17
Views: 728

Re: PST Mod Reflections back off the Blocking Filter

Andrew, The pins are still there but just run on the interior surface of the housing. The prism is held by the focussing screw and the size of the block used. All the PST’s as far as I know were assembled in Mexico. Due to warranty returns etc etc there’s no meaningful relation between the serial an...
by Merlin66
Sun Mar 10, 2019 6:37 am
Forum: This is SolarChat !!
Topic: Were to put uv/ir filter?
Replies: 6
Views: 207

Re: Were to put uv/ir filter?

More important than the UV-IR is the mandatory ND3 filter.
You can fit an UV-IR after the ND3 if you feel concerned.
by Merlin66
Sat Mar 09, 2019 10:52 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: New PST ITF?
Replies: 33
Views: 4143

Re: New PST ITF?

The angled thread is to give a slight tilt to the ITF filter.....
by Merlin66
Sat Mar 09, 2019 9:55 am
Forum: Solar Scope Modifications
Topic: PST Mod Reflections back off the Blocking Filter
Replies: 17
Views: 728

Re: PST Mod Reflections back off the Blocking Filter

Andrew,
I can assure you on the ones I stripped down there were no guide grooves in the housing......
I think the angled prism comes from "Basic" assembly skills used in Mexico.......
by Merlin66
Fri Mar 08, 2019 11:15 pm
Forum: Solar Scope Modifications
Topic: PST Mod Reflections back off the Blocking Filter
Replies: 17
Views: 728

Re: PST Mod Reflections back off the Blocking Filter

Andrew, I can seem to find the photo..... Can you help? Ken OK, final found your PST images in your Blog....one shows the pips on the prism block but no image of the "groove" in the housing. On the couple I stripped there was plenty of grease on the housing with track marks of the pins but no physic...
by Merlin66
Fri Mar 08, 2019 6:51 am
Forum: Solar Scope Modifications
Topic: PST Mod Reflections back off the Blocking Filter
Replies: 17
Views: 728

Re: PST Mod Reflections back off the Blocking Filter

Andrew,
I never saw any slot in the housing for the pips on the block.....
by Merlin66
Fri Mar 08, 2019 6:49 am
Forum: Solar Scope Modifications
Topic: PST Mod Reflections back off the Blocking Filter
Replies: 17
Views: 728

Re: PST Mod Reflections back off the Blocking Filter

The prism is mounted to the block with a black flexible mastic....I’ve repaired a couple where the prism was removed from the block, (note the relative position) and remounted using super silicon to get a better positioning and orientation. If you don’t have an ITF in the eyepiece holder then I’m no...
by Merlin66
Wed Mar 06, 2019 10:40 pm
Forum: Solar Scope Modifications
Topic: PST Mod Reflections back off the Blocking Filter
Replies: 17
Views: 728

Re: PST Mod Reflections back off the Blocking Filter

Andrew, how square and parallel to the top of the black box is the prism sitting?
Is the tilt of the ITF at right angle to the prism face?
by Merlin66
Tue Mar 05, 2019 7:51 am
Forum: This is SolarChat !!
Topic: Why stack ????
Replies: 4
Views: 308

Re: Why stack ????

Start with fast frame imaging capturing those moments of best seeing...
Stacking these “best” frames gives a better signal to noise image and improved quality when processed.
by Merlin66
Fri Mar 01, 2019 3:45 am
Forum: Solar Software
Topic: Fire capture woes
Replies: 10
Views: 413

Re: Fire capture woes

Yes, that's a normal start-up.
by Merlin66
Wed Feb 13, 2019 6:07 am
Forum: This is SolarChat !!
Topic: Software Section On The Forum
Replies: 14
Views: 412

Re: Software Section On The Forum

Mark,
I like the concept...
What criteria do we apply? Discussions on the actual software? or examples (could be an issue?) using the software?
Do we have a suggested list of software which should/ could be included?
(There are some tutorials already in the Library)
by Merlin66
Wed Feb 13, 2019 4:56 am
Forum: This is SolarChat !!
Topic: The effect of a circular polarizer in a double stack
Replies: 17
Views: 918

Re: The effect of a circular polarizer in a double stack

https://www.edmundoptics.com/resources/ ... aveplates/
George,
Fig 9 shows what I think you are saying....
This infers either way should work.......
by Merlin66
Sat Feb 09, 2019 10:41 pm
Forum: This is SolarChat !!
Topic: Old Coronado BF30
Replies: 27
Views: 1611

Re: Old Coronado BF30

All's well that ends well.