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It may just be that the tube was painted with a thin wash of some fugitive pigment that has faded over the years.
I once had an opportunity to get very close (15cm) to a Hieronymus Bosch painting in Washington.
Much of that painting was ‘transparent’ and the under work clearly visible.
Roy.My journal arrived first thing this morning.
The new paper wrapper however was only just holding closed. The self adhesive seal was only one jolt away from being fully open.
The stuffing machine is probably not applying enough pressure. Finger pressure was enough to seal it completely.
Could be worth looking at if there are any other reports.
Roy.One problem with the Observing Calendar.
When viewed in night mode (my default) the month and year are Black on Black while the main body of the calendar remains blinding white.
Otherwise a fine piece of work.I did not have a clue what this post was about.
So I googled G4ddk VLNA and came up with a .pdf which included the following.Quote:
Voltage checks
Connect +12 to +20V to the feedthrough capacitor C18 and the negative (ground) to the
solder tag.
Connect good quality 50Ω SMA terminations to the input and output connectors.
Adjust R14 fully anti-clockwise and then turn clockwise about 30 degrees (not critical).
Switch on the supply and check that the total current taken is approximately 80mA +/-
10mA.
:Unquote.It looks like +12v (or maybe +13v from a car batery) at 100mA to me!
Have a look at the .pdf to see if it ties up with what you are doing:
http://www.g4ddk.com/VLNASept13.pdf
Hope the link works.
Roy.
At the risk of disappearing completely down the rabbit hole.
Might I suggest Apple Pie in memory of the apple that inspired Isaac Newton.
Possibly served with a scoop of ISS-CREAM.
Maybe not that practical in the dead of night, but could work.
A more apt choice may be a Moon Cake, which is in fact sort of pie of Chinese origin.
Though even this might be depreciated by deep sky observers.
Roy.The main characteristic of Stargazy Pie is the whole Mackerel fish placed in the pie with their heads sticking out of the top “Gazing at the Stars”.
The BBC has a recipe.
Roy.The Merry-go-round observatory put me in mind of “A PRACTICAL HEATED OBSERVATORY BY E. G. HILL” in the 1962 JBAA V72,3 p102. A similar idea based on a newtonian reflector. No video though. It might have appeared on the Sky at Night as the report predates my membership but I have strong memory of it.
Roy.Just fell for this one (I’m an infrequent poster!). Speedily sorted out after an “Oops…” and a second login. But the Web profile page is misleading. There seems to be at least two places that appear to be for putting in a short name / nickname as well as the drop down list at the top (which looks to have done it for me). er…
Roy.Sorry,
can’t help with the spiders but…
The self-adhesive copper tape sold by garden centres (and of course the online market place of your choice) may provide a snail free floor.
Roy.I’m sure you have already spotted these, but just in case…
https://www.popastro.com/main_spa1/society-history/
Has a few early copies, scannned at reduced resolution.
Roy
As you might suspect Tewdwr comes into english as Tudor. There was a good welsh/english name thanslation table available on the Find My Past website. Proved very useful understanding my own family history. Wonder if the ..us ending might just be a latinisation, cf. Kopernik/Copernicus.
Roy.
Thanks for the great photograph.
It appears to be in super condition. Maybe one careful owner from new 🙂
Given the difficulty of using it when fully extended, I doubt it was ever used in earnest. At least not without some kind of pole and cradle arrangement.
Roy.
No new information I’m afraid.
But his 150 inch (fl) telescope pictured in the online catalogue of the British Optical Association Museum is truly the stangest thing I’ve come across in a long time.
Good luck in your hunt.
Roy
Love the Gothic on the front cover. Thankfully not continued inside.
The Brunsvega reminded me of my computer course at Wandsworth Tech in the early 1960’s where it was used to introduce techniques of multiplication on the basic computers of the era. I later programmed mainframes that did not have hardware math units to do multiplication using the shift and add principal from these machines! So if your bank interest in the 60’s/70’s was wrong, it was probably me.
Roy.
It slooks like the Sky at Night will be touching on this next sunday.
“Beyond the Visible
The Sky at Night team discovers the new techniques being pioneered by vision-impaired astronomers to see the universe, using their senses of hearing and touch.”If a smaller diameter (22mm?) carbon fibre tube is rigid enough then you could try a split sleave of thin 1 inch diameter alluminium tube over it for the grub screw to bite into. This would spread the load on the carbon composite. I note (on ebay) that the clamps sold for carbon fibre tubes are not dissimilar to (posh) pipe clamps, so it might work.
Roy
I was curious. So I googled around and found this site giving a DIY version of what you are trying to do.
Certainly looks do-able, advisable?, who knows.
https://www.skyimager.com/mirror-lock.html
Hope this helps.
Roy
