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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only. |
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24th May 2020, 11:38 am | #1 |
Dekatron
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A very heavy speaker
I found this in the loft , why was it so heavy ? just look . Mick.
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24th May 2020, 11:42 am | #2 |
Octode
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Re: A very heavy speaker
WOW!!!
Superb Steve.
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24th May 2020, 11:46 am | #3 |
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Re: A very heavy speaker
That's certainly impressive to look at, I take it that's some sort of early permanent magnet? If so, has it any strength left to it?
Really hope it's serviceable as I can imagine the sound could rattle the windows right out of the frame! |
24th May 2020, 12:00 pm | #4 |
Pentode
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Re: A very heavy speaker
It looks like an early pot magnet to me.
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24th May 2020, 12:13 pm | #5 |
Octode
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Re: A very heavy speaker
Made from a left over cannon ball!!!
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24th May 2020, 1:43 pm | #6 |
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Re: A very heavy speaker
The basket looks like pressed, folded sheet steel. Looks a bit weak. Good job there is a brace to the bottom.
I guess the race is on to identify who made the driver. Could a maker's label have fallen off? David
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24th May 2020, 1:53 pm | #7 |
Heptode
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Re: A very heavy speaker
A work of art !
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24th May 2020, 2:34 pm | #8 |
Dekatron
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Re: A very heavy speaker
Never seen a speaker magnet like that before. It could be medieval.
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24th May 2020, 2:44 pm | #9 |
Dekatron
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Re: A very heavy speaker
The cabinet fretwork is Blue Spot, and I've seen a few massive early PM 'speakers in my time, if nothing quite like this.
Could be this one (the cabinet at least looks right) ? http://www.valve-radio.co.uk/wp-cont...2016/09/44.jpg Paul |
24th May 2020, 3:51 pm | #10 |
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Re: A very heavy speaker
Looks like we have a probable identity then. Were/are Blue Spot any trading relation to Blaupunkt? And, in either case, what was the attraction of applying such a name to high end equipment? I seem to recall quite a few companies over the years using the name Blue Spot in one form or another, hence my wondering what it's significance could be?
Must be quite a rarity as can't imagine many folk shelling out for the best of the best. |
24th May 2020, 5:34 pm | #11 |
Dekatron
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Re: A very heavy speaker
Nothing on the driver ,but Blue spot on the cabinet back, it is all original. not tested it yet. Mick.
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24th May 2020, 5:52 pm | #12 |
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Re: A very heavy speaker
It's probably all show with just a golf ball sized magnet under that dome!
Looks amazing. I wonder what it sounds like? John. |
24th May 2020, 7:04 pm | #13 |
Dekatron
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Re: A very heavy speaker
I have just tested it ,it has a built in tx so ran another one back to back from my ,beloved valve amp , I sounds fantastic even driving it hard with bass it seems to handle it. a bit low on treble , poss due to the two tx's , a close inspection of the magnet shows a Blue Spot symbol . I bet it was expensive in it's day .Mick.
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24th May 2020, 7:34 pm | #14 |
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Re: A very heavy speaker
Eighty-seven and sixpence, if you follow the link Paul RK posted.
Any firm using a driver with a magnet like that today would put it in a perspex cabinet! David
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24th May 2020, 8:08 pm | #15 |
Dekatron
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Re: A very heavy speaker
Oops! I missed that link , thank's Paul RK, and David, for pointing it out . Mick.
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24th May 2020, 8:19 pm | #16 |
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Re: A very heavy speaker
The catalogue is "Copyright by the British Blue Spot Co. Ltd 250/7/32" so 1932?
https://www.gracesguide.co.uk/British_Blue_Spot_Co Ceased trading in 1938, I wonder if that was because of their German roots? https://www.***********/photos/ttjunno/5359901103/
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24th May 2020, 8:32 pm | #17 |
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Re: A very heavy speaker
Aha, so I was (at least partly) right about Blaupunkt...
Wish my loft produced such finds, alas it's all crimbo decs and old kids toys! |
25th May 2020, 11:12 am | #18 | |
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Re: A very heavy speaker
Quote:
The huge magnet probably just reflects the state of the art for magnetic alloys at the time though it's possible that there's a bit of showmanship involved as well.
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4th Jun 2020, 12:52 pm | #19 |
Octode
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Re: A very heavy speaker
Just found this in the 1933-34 catalogue from,
Northern Radio & Cycle Supplies, 19 Skinnergate,, Darlington. John |
4th Jun 2020, 2:22 pm | #20 |
Dekatron
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Re: A very heavy speaker
That's the one John , I was pleased to find that the o/p tx was ok when testing it , I put some decent audio through it , and it sounded rely good , Mick.
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