Thanks everyone for your kind comments.
Richard- those are pipe clamps. One end screws onto the end of the pipe & the other is adjustable by sliding along the pipe. I love them because you're only limited by the length of the pipe, so they're really good for big cabinets etc.
Paal- Rexonola was Australia's most successful off-brand machine. They started out in 1906 as Sydney's only Edison franchise, and also imported open horn machines called Rexophones from Thorens.
In 1912 they began manufacturing their own cabinets, still using Thorens components. It's believed that between 1912 & 1930, around 180,000 Rexonola's were produced.
Emidicta- The Prismaphonic soundbox is no match for the No.5's. They really only sound slightly better than the No.4's IMO. The only advantage is the aluminium diaphragm. I've actually found they wear records more than your average soundbox.I think this is due to the type of needle bar pivot employed, and the overall weight of them. An HMV 5a weighs 145g, but the Prismaphonic is a massive 173g. Both diaphragms are the same size, but of different designs. They do fit a standard Victor/HMV tonearm, but I wouldn't recommend playing your best records with one. Even if Thorens made slightly lighter models, I still don't think the needle bar pivots (if you can even call it that) are a very healthy design.
Jim- The combination of the Prismaphonic soundbox, and what is only a really basic saxophone horn, make it not much better than a good HMV table model using a No.4 S/B. The sound doesn't even come close to that of a 163 Re-entrant.
Here's a picture of the reproducer & "pivot". The brass plate attaches to the reproducer body & needle bar, so the plate is what acts as the pivot between the two. Paillard also used the same design on their soundboxes at the time. Paillard however used steel as the body/back instead of pot metal, so they only weigh 145g like an HMV 5a, and don't seem to wear records like the Thorens version.
I thought I'd throw in a couple Rexophone record labels while I'm at it. These were imported from 1911 to 1917, originally from Homophon Gmbh, then Homophon UK because of the war, and lastly from J.E. Hough Ltd of Edison-Bell fame.
