PAPER HORN "BALMAIN"

Discussions on Talking Machines of British or European Manufacture
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Daithi
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Re: PAPER HORN

Post by Daithi »

Inigo wrote: But the backplates he's made have a different back collar, as it's made so it fits directly in the tonearm, with 'no need of that perishable rubber collar'...!
I was aware that the Street backplate might effect the sound but it never dawned on me that it might effect record wear. Silly me!
This gives me pause for thought especially as it is backed up by the link which Soundgen provides where similar caveats are aired. The lightness of the Street backplate might mitigate this but certainly not eliminate it.
Maybe its time to have some made up with provision for more damping.
The search for perfection never ends does it?

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Inigo
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Re: PAPER HORN

Post by Inigo »

Deleted, FATAL ERROR.
Inigo

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Re: PAPER HORN

Post by old country chemist »

nipper and EMG etc 001.jpg
I have put the paper horn I am making, complete on it's former in the conservatory on October 2nd.to dry. When I am in there, sometimes the sun is quite strong, and so, I give the horn a quarter of a turn to keep the heat from drying one area out too quickly.
Has anyone the slightest idea about how long it will take to dry...?
I started putting the first layer of sugar paper on the horn early August, and finished the 32nd layer near end of September, leaving the layers to dry for 24 hours before applying another coat of sugar bag paper.
Mr Frank James, the EMG Guru,besides supplying me with most of the sugar paper, also let me have some "finishing papers" to cover the horn when completely dry-if it ever comes off the former! I may only have enough of this special mid brown grain effect papers to coat either the outside or the inside. I thought maybe to coat with the paper, the outside, and then using a suitable rich brown eggshell (sheen) finish of good quality emulsion paint, give it 2 or 3 coats on the inside of the horn. Using sheen finish will ensure that there are no reflectivity issues with the sound emanating from the horn hopefully.

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Inigo
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Re: PAPER HORN

Post by Inigo »

Correct me if I'm wrong... But haven't we read somewhere in this forum (Graham...?) or in the EMG/Expert literature, that a too crystal shiny finish inside the horn may spoil the sound somehow, and that certain grade of soft rugosity is needed instead? I would apply a paper-like finish inside, or make tests before applying something that cannot be removed later (or re-covered in a different texture)...
We've also known from Graham's experiments with his modern horns, that the border of the horn mouth must be perfectly regular to obtain that three-dimensional quality of the sound.
Inigo

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kirtley2012
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Re: PAPER HORN

Post by kirtley2012 »

old country chemist wrote:
The attachment nipper and EMG etc 001.jpg is no longer available
I have put the paper horn I am making, complete on it's former in the conservatory on October 2nd.to dry. When I am in there, sometimes the sun is quite strong, and so, I give the horn a quarter of a turn to keep the heat from drying one area out too quickly.
Has anyone the slightest idea about how long it will take to dry...?
I started putting the first layer of sugar paper on the horn early August, and finished the 32nd layer near end of September, leaving the layers to dry for 24 hours before applying another coat of sugar bag paper.
Mr Frank James, the EMG Guru,besides supplying me with most of the sugar paper, also let me have some "finishing papers" to cover the horn when completely dry-if it ever comes off the former! I may only have enough of this special mid brown grain effect papers to coat either the outside or the inside. I thought maybe to coat with the paper, the outside, and then using a suitable rich brown eggshell (sheen) finish of good quality emulsion paint, give it 2 or 3 coats on the inside of the horn. Using sheen finish will ensure that there are no reflectivity issues with the sound emanating from the horn hopefully.
Alastair, you seem to have accidentally drawn my living room :lol:
1786D31A-487B-4D01-9D8E-440014561540.jpeg

old country chemist
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Re: PAPER HORN

Post by old country chemist »

Hello Alex. Good to hear from you.I must have had one of my "visions" when I inadvertently drew your living room-albeit without the lovely guitars that I am told you are making. Good to see an Expert and an EMG in the room, which I imagine is a good size, as the instruments cannot give their full potential in a small room. I hear you are "tuning" soundboxes-did you learn that from tuning guitars?=joking aside.

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emgcr
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Re: PAPER HORN

Post by emgcr »

John Cook, the skilled maker of the red-horned Balmain-design Wilson horn gramophone visited my home on Friday and we spent many enjoyable hours comparing the audio output of three external-horn gramophones---Balmain, EMG Mk VIII and EMG Xb Oversize. It occurred to us that nobody has yet ever had the public opportunity of hearing such comparisons as, so far as is known, no original Balmain gramophone exists.

During the course of this thread there have been a few doubts expressed as to whether the Balmain gramophone is really a practical proposition and would work in a satisfactory fashion. I can confirm that it performs brilliantly in all required respects---plays perfectly with absolutely no detectable increased record wear---but does, of course, need to be set up very carefully. As mentioned previously, it is vital that the track/carriage is absolutely level in both planes. It is also extremely important that the construction dimensions result in the correct needle pressure and that the rolling track friction is as low as possible. In this case John has allowed generous tolerances in order to minimise friction and allow for irregularities in records etc. Different soundboxes were tested which resulted in slightly different lateral needle positions, thus adjustments (allowed for in the design) had to be made each time the soundbox type was changed so as to ensure correct tracking to the centre of the motor spindle. Exhibition, HMV and EMG soundboxes were assessed with the latter proving the most satisfactory.

For those wishing to make their own, John has the following initial recommendations and is also more than happy to answer questions by email/telephone etc upon request. There is much to think about before embarking but his first recommendation is to decide upon the length of (Wilson-type) horn. This decision is not easy and reference should probably be made to Peter Heath’s excellent PDF attachments earlier in this thread. It would then be wise to make the bare horn and soundbox attachment before anything else so that weight and point-of-balance can be exactly determined. John’s horn weighs 3.2 kg (7.05 lbs). Possessing this definite item, calculations can then be made in respect of track length and horn pivot point. After this, he suggests making a cheap softwood construction to prove the design before going to the trouble of finely-finished hardwood.

John has used an HMV 32 double-spring motor and the case contains a heavy cast-iron weight to act as a counterbalance. Were he to do the job again, he would construct the case to allow removal of the counterweight without having to lift the motor board.

Here are the performance videos :

https://www.youtube.com/watch?v=owX7Pnqm-Nw Balmain-design gramophone in action---close up.

https://www.youtube.com/watch?v=z16o39aT_UQ Balmain-design gramophone comparison demonstration. Steel needle. BALMAIN.

https://www.youtube.com/watch?v=nYbKo9ufA4w Balmain-design gramophone comparison demonstration. Steel needle. EMG Mk VIII.

https://www.youtube.com/watch?v=OLfxyVOWV_8 Balmain-design gramophone comparison demonstration. Steel needle. EMG Xb Oversize.


https://www.youtube.com/watch?v=8E16t5Ne4JI Balmain-design gramophone comparison demonstration. Thorn needle. BALMAIN.

https://www.youtube.com/watch?v=JRyUHCo01ok Balmain-design gramophone comparison demonstration. Thorn needle. EMG Mk VIII.

https://www.youtube.com/watch?v=HuJ8uZq7PEs Balmain-design gramophone comparison demonstration. Thorn needle. EMG Xb Oversize.

Followed by detailed photos :
Attachments
EMG Mk VIII, Balmain, EMG Xb Oversize.
EMG Mk VIII, Balmain, EMG Xb Oversize.
EMG Mk VIII, Balmain, EMG Xb Oversize.
EMG Mk VIII, Balmain, EMG Xb Oversize.
With owner/constructor John Cook.
With owner/constructor John Cook.
With two original Wilson horns (early and late).
With two original Wilson horns (early and late).
Carriage---top view.
Carriage---top view.
Carriage removed to show wheels and lower track.
Carriage removed to show wheels and lower track.
Underside of carriage to show upper track.
Underside of carriage to show upper track.
Joint to motor/turntable case---demountable by lifting and sliding.
Joint to motor/turntable case---demountable by lifting and sliding.
Carriage and case with creator and owner.
Carriage and case with creator and owner.
HMV 32 motor and cast-iron counterweight.
HMV 32 motor and cast-iron counterweight.
Last edited by emgcr on Sat Oct 17, 2020 6:46 pm, edited 1 time in total.

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emgcr
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Re: PAPER HORN

Post by emgcr »

More photos :
Attachments
Horn pivot showing adjuster.
Horn pivot showing adjuster.
Underside of horn lateral adjustable restraint.
Underside of horn lateral adjustable restraint.
Top of horn lateral adjustable restraint.
Top of horn lateral adjustable restraint.
Lateral horn restraint pivot details.
Lateral horn restraint pivot details.
Rail bearing of lateral horn restraint.
Rail bearing of lateral horn restraint.
Soundbox connection.
Soundbox connection.
Horn internal connection to pivot block.
Horn internal connection to pivot block.
Horn pivot detail allowing easy demounting.
Horn pivot detail allowing easy demounting.
Three-quarter front view of whole assembly.
Three-quarter front view of whole assembly.
Whole track support which hooks into rear of case internally.
Whole track support which hooks into rear of case internally.

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Re: PAPER HORN

Post by CarlosV »

The comparison is very impressive! the videos do not allow to make a conclusion about the best reproduction, but it is evident that the Balmain reaches a comparable level of performance to the EMGs. Very good craftmanship as well, congratulations to the designer!

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emgcr
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Re: PAPER HORN

Post by emgcr »

Absolutely, the sound and construction are first class and John is to be congratulated on a superb job.

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