klipschorn
Klipschorn
Does anyone know when the BR/3 tweeter was introduced? I know there was a "Midget" introduced in the late 40's for a few years and was replaced by the venerable Super 3. The Midget also had a square magnet. These BR/3 units have a square red magnet that is not quite as strong as that of the Super 3. It appears to be the same as that used on the early 5 inch units and also later on the 10 inch units. They had aluminum dust caps and an aluminum voice coil. The label on the back plate is very similar to that used on very old units. The label and corporate logo was changed sometime in the early 60's.
The attached piccy shows the two units during a restoration. Note also the foam centering device used inside the voice coil. Internet searches have yielded nothing.
The eBay seller from whom I bought these was unable to describe the enclosures as looking like something designed in the 40's or 50's. That was based on an erroneous assumption that the seller knew what such an enclosure design looked like. All he told me was that they came from a cabinet with a W10/FSB woofer, one3 of which was missing and the other as having what seems to be an open voice coil. My request to make purchase of the remaining W10 has yet to be answered.
There is no mention of this BR/3 in the book titled "A Pair Of Wharfedales". The Midget is mentioned on pages 81 & 87, a chapter which covers the period between 1937 and 1946. It also mentions that the Midget was the only new non-transformer product introduced during WW-II. A greyscale picture of the Midget is shown on page 81 and implies a magnet that has been painted as it doesn't appear to be bare metal. Due to the angle of the speaker in that photo, the label is unclear, even under a microscope.
The attached piccy shows the two units during a restoration. Note also the foam centering device used inside the voice coil. Internet searches have yielded nothing.
The eBay seller from whom I bought these was unable to describe the enclosures as looking like something designed in the 40's or 50's. That was based on an erroneous assumption that the seller knew what such an enclosure design looked like. All he told me was that they came from a cabinet with a W10/FSB woofer, one3 of which was missing and the other as having what seems to be an open voice coil. My request to make purchase of the remaining W10 has yet to be answered.
There is no mention of this BR/3 in the book titled "A Pair Of Wharfedales". The Midget is mentioned on pages 81 & 87, a chapter which covers the period between 1937 and 1946. It also mentions that the Midget was the only new non-transformer product introduced during WW-II. A greyscale picture of the Midget is shown on page 81 and implies a magnet that has been painted as it doesn't appear to be bare metal. Due to the angle of the speaker in that photo, the label is unclear, even under a microscope.