24.8.21

24.08.2021

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Monday 24th 46+ F, bright sunshine. Thin, high cloud is softening the sun.  

10.00 CET I am struggling to get a sharp image through the cloud mask. Made worse by the sweet spot ring. The rubber band isn't working today.

The dome is saturated with dew again. I have removed the tarpaulin. 

The new batch of polyester resin should be available later from a local, parcel pickup-point. It wasn't. The parcel must have broken open as it was returned to sender. It was a perfect day and I was looking forwards to fibre-glassing the second slit rib externally.

Imaging is pointless. So I had better look at marking the base ring levels on the stakes. Drilled and pinned to support the base ring. Sawed off the bottoms of the slit ribs to the same level. 


 

 

11.51 Large prom on SW limb. Changed to PST BF. Poor image.

It was much cloudier in the afternoon.

I have installed the drawer slides on the glass-fibred, zenith board. I had to Csk the fixing holes for 4.5mm countersunk head screws. 5mm is too large. Completely blocking the inner slides from moving in or out. 4mm drops straight through the fixing holes! 

Crap design for a heavy duty and expensive slide! Some slides even allow dome head screws. This one is folded inwards precisely where the screw heads would lie when the slides moves. Clearance is critical.

I have given the slides a slight upwards tilt towards the outsides. If the shutters' weight makes the slides sag then this should help to keep them level. Otherwise the slope should give a slight closing bias. Better than having to close them "uphill."

16.30 I just checked the sun for imaging but it is still hopelessly soft focus from thin, high cloud. Bright flares and dark filaments surround AR2859 in the middle-east.

18.16 A final attempt at cutting through the soft focus, cloud filter. Note the delicate light bridge across the AR2859 umbra. All the later images were worse!


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