Search found 3164 matches

by Merlin66
Fri Nov 16, 2018 9:40 pm
Forum: This is SolarChat !!
Topic: PST labels / PST tubes
Replies: 4
Views: 76

Re: PST labels / PST tubes

Pedro,
The second dismantled PST looks like it has the “gold” objective??
by Merlin66
Thu Nov 15, 2018 11:51 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: DayStar T scanner TS-1??
Replies: 11
Views: 376

Re: DayStar T scanner TS-1??

Mark, Thanks for that, appreciated. I’ve managed to source a 10-32 set screw, Is the end of the screw just a domed end where it interfaces with the tilter? I haven’t obviously dismantled the filter. The front gold element looks pretty clear and the rear red element has a couple of small bubbles. I t...
by Merlin66
Thu Nov 15, 2018 12:49 am
Forum: This is SolarChat !!
Topic: PST labels / PST tubes
Replies: 4
Views: 76

Re: PST labels / PST tubes

Second image with the larger "PST" and brass tube is the older "original". The "Gold" anodised tube is a recent change.... Many of the older "Gold" objective PST's with lower serial numbers were upgraded (under warranty) to the "Blue" objective and ITF in the eyepiece tube, so it's difficult to go b...
by Merlin66
Wed Nov 14, 2018 10:47 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Rust on either Lunt or Coronado
Replies: 3
Views: 126

Re: Rust on either Lunt or Coronado

I agree, but the Lunt replacement BG element is also subject to failures....
B1200_failure_iis.jpg
B1200_failure_iis.jpg (163.58 KiB) Viewed 65 times
Lunt-blocking-filter-problem_12-09-25_12r.jpg
Lunt-blocking-filter-problem_12-09-25_12r.jpg (195.12 KiB) Viewed 65 times
IMG_9852_lunt b1200.jpg
IMG_9852_lunt b1200.jpg (102.82 KiB) Viewed 65 times
by Merlin66
Wed Nov 14, 2018 9:52 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: DayStar T scanner TS-1??
Replies: 11
Views: 376

Re: DayStar T scanner TS-1??

The details I have: Unit is a Daystar Solar Filter model TS-1 Serial # TS-697 Operating temperature - Ambient Power - Not applicable Cw - 6562.8 A HW - 0.7 Daystar TS-1.jpg I'd like to at least try it in a f30 beam (with upfront ERF) but need to solve the tilt screw problem..... (EDIT: Tried a 3/16"...
by Merlin66
Wed Nov 14, 2018 9:59 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Rust on either Lunt or Coronado
Replies: 3
Views: 126

Re: Rust on either Lunt or Coronado

Failure of the ITF filter in both the Lunt and Coronado is still a common occurrence.
I know know if it really helps but I do store my BF in sealed containers with Silica Gel.......
by Merlin66
Wed Nov 14, 2018 9:30 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: DayStar T scanner TS-1??
Replies: 11
Views: 376

Re: DayStar T scanner TS-1??

Mark,
I’m in Australia.
Can you confirm the size and design of the filter tilting screw?
I’ve just received it - it looks promising and is mounted on a 2” diagonal bur the tilt screw is missing.....
Looks like a 3/16” thread??
Appreciate any input.
Ken
by Merlin66
Wed Nov 14, 2018 5:37 am
Forum: This is SolarChat !!
Topic: Old Coronado BF30
Replies: 22
Views: 375

Re: Old Coronado BF30

I had at one time a IOM tilting BF20 which I hoped to use with an SM40...this was back around 2007.
Never worked well for me.
by Merlin66
Tue Nov 13, 2018 12:02 am
Forum: This is SolarChat !!
Topic: Old Coronado BF30
Replies: 22
Views: 375

Re: Old Coronado BF30

Bart,
Is it supposed to be a full BF30 filter assembly? An ITF plus a final blocking/ sort filter???
by Merlin66
Sun Nov 11, 2018 11:07 pm
Forum: This is SolarChat !!
Topic: Mg II in UltraViolet
Replies: 43
Views: 1119

Re: Mg II in UltraViolet

Hmmm
Once we have solved all these technical difficulties....
What about a camera which can record that far into the UV??????
by Merlin66
Sun Nov 11, 2018 7:57 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: DayStar T scanner TS-1??
Replies: 11
Views: 376

Re: DayStar T scanner TS-1??

I don’t know about the ION update costs, but Daystar quoted >$850 for blocking and trimmer replacement- No guarantee
by Merlin66
Sun Nov 11, 2018 6:06 am
Forum: This is SolarChat !!
Topic: Smooth focus !!!
Replies: 7
Views: 199

Re: Smooth focus !!!

The solution I've used on all my refractors (with 10:1 gearing) is to add an Orion/ Sky Watcher focus motor package. Depending on the focuser design it may involve replacing two of the small (M3) screws with longer screws to allow the fitment of a spacer block (6mm thick works OK) and then one of th...
by Merlin66
Sun Nov 11, 2018 2:07 am
Forum: Solar Scope Modifications
Topic: Finally getting to PST Stage 2 Mod
Replies: 1
Views: 85

Re: Finally getting to PST Stage 2 Mod

I used a 102 f10 for one of my mods and didn’t need to cut the tube.
The correct distance for a standard PST etalon is exactly 200mm inside focus.
The back focus again in a standard PST etalon is 200mm.
by Merlin66
Thu Nov 08, 2018 12:24 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: DayStar T scanner TS-1??
Replies: 11
Views: 376

DayStar T scanner TS-1??

Anyone still using this obsolete TS-1 Daystar H alpha filter?
If so, what are the issues????
Let me know,
ken
http://www.company7.com/daystar/products_old.html
by Merlin66
Wed Nov 07, 2018 11:39 pm
Forum: This is SolarChat !!
Topic: Mg II in UltraViolet
Replies: 43
Views: 1119

Re: Mg II in UltraViolet

I use various telescopes , including the ol' Genesis for spectroscopy with commercial CCD's. My experience is that the available CCD's have little or no response below 360nm. The Strehl ratio for the Genesis at around 370nm seems acceptable, giving a good workable stellar image. I use the ATiK 314L ...
by Merlin66
Sat Nov 03, 2018 4:48 am
Forum: This is SolarChat !!
Topic: The "first" coronado pst mod.
Replies: 2
Views: 121

Re: The "first" coronado pst mod.

Yeah,
I remember that....
Early 2007 we were modding PST in the UK.
I was the first to identify and measure the front PST barlow element and publish the "majic" spacing -200mm inside focus as a definitive requirement.
by Merlin66
Sat Nov 03, 2018 12:14 am
Forum: This is SolarChat !!
Topic: Focus without the wobbles
Replies: 3
Views: 111

Re: Focus without the wobbles

I have and use various ED80 scopes (as well as the spectroheliograph) and on all of them I've fitted the SkyWatcher electronic motor (Identical to the Orion motor). Works 110% for me. I use a 100 tooth 6mm wide XML timing belt, 30 tooth pinion to drive the 10:1 focuser knob. Gives good and reasonabl...
by Merlin66
Thu Oct 25, 2018 10:13 pm
Forum: This is SolarChat !!
Topic: Crazy Big Proms Today! And Full Disc | 150mm HA | Oct 24th 2018
Replies: 12
Views: 276

Re: Crazy Big Proms Today! And Full Disc | 150mm HA | Oct 24th 2018

It appears I was lucky!! Clouded out in the afternoon and it now looks like (according to GONG) it's disappeared.
One of those majic moments.
by Merlin66
Thu Oct 25, 2018 8:00 am
Forum: This is SolarChat !!
Topic: Spectacular eruption captured on AIA image
Replies: 10
Views: 270

Re: Spectacular eruption captured on AIA image

I images this spectacular prom this morning.
Majic!!
by Merlin66
Thu Oct 25, 2018 4:05 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: BF30 ITF replacement
Replies: 15
Views: 703

Re: BF30 ITF replacement

OK......
I yield.....
by Merlin66
Thu Oct 25, 2018 3:59 am
Forum: This is SolarChat !!
Topic: Crazy Big Proms Today! And Full Disc | 150mm HA | Oct 24th 2018
Replies: 12
Views: 276

Re: Crazy Big Proms Today! And Full Disc | 150mm HA | Oct 24th 2018

Looks like the larger prom developed into a double extended column. Majic!!!
When I first looked at GONG I thought it must be a plate fault.
SM60+ASI174MM on ED80.
Sun_114312_cor.jpg
Sun_114312_cor.jpg (116.32 KiB) Viewed 231 times
by Merlin66
Mon Oct 22, 2018 3:21 am
Forum: This is SolarChat !!
Topic: ZWO ASI290MM is too slow in the FireCapture V2.6.08
Replies: 9
Views: 300

Re: ZWO ASI290MM is too slow in the FireCapture V2.6.08

Valery,
What’s the difference working with neutral gamma (50) and using unity gain and then altering the exposure value to give a good histogram?
by Merlin66
Sun Oct 21, 2018 8:44 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: BF30 ITF replacement
Replies: 15
Views: 703

Re: BF30 ITF replacement

I’ve mentioned previously, but repeat my myself again. Why do we think blocking IR beyond 1400nm is an important issue in solar filter design? This region is heat not light and well beyond the sensitivity of the eye or current imaging sensors. I accept that extended and prolonged exposure to IR can ...
by Merlin66
Fri Oct 12, 2018 8:25 pm
Forum: Solar Astronomy Shop and Swap
Topic: "Astronomie Solaire" - New (French) book on Solar Observation now available
Replies: 18
Views: 603

Re: "Astronomie Solaire" - New (French) book on Solar Observation now available

Christian,
Looks good!
Maybe you can include some information on the Spectroheliograph in the next edition ;-)