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Not really sure about boroque bow tension, but I would think you would need enough to make it playable like a modern bow and be able to adjust the tension with the screw, (if it has one), I'm unable to find the pic you posted of it.
As far as hair width, a hank of bow hair usuall contain's 150-200 hair's. If the hair is narrower at the frog, there is a possibility that the wooden shim/spreader has come out between the hair and the ferrule. This happened with my pernambuco bow I had rehaired last year. I noticed that the hair was very narrow at the frog, but normal width at the tip, I knew I hadn't lost any hair's, so when I took it to another luthier, he said it hadn't been rehaired properly and that the wood shim/spreader had fallen out letting the hair's clump together, they were only about 7 mm wide. After it was fixed, the hair's now measure 11mm at the frog.
Incidentally, you really don't realize how fine the hair's are untill you start counting them. One of my bow's with "Fiddlershop" hair counted 178 hair's. Definately not good on the eye's.
No, it's the same thickness all the way. It looks as if it's as it should be.
And yes, it does have a screw.
Its OK to use but I find that it handles better with a higher tension.
I can't find a great deal about them on the web except for their history.
Am going to China in a couple of days and am considering bringing back an Erhu
They have quite an odd bow. They are also tuned in fifths like a violin. They look like a violin that has been in a bad car accident and when reassembled, they didn't have all the parts.
Seen it all. Done it all. Can't remember most of ..... What was I saying????
hmm...since the cambering in the bow is the same as a modern bow, it should be the same as the tension of the modern bow, as long as it is not touching the stick and it's easy to do techniques, but it has a snakewood stick, so it's harder than the more flexible pernambuco........ erhus are awesome!!!!
cheers! - ⁰ℨ
considering bringing back an Erhu
They look like a violin that has been in a bad car accident and when reassembled, they didn't have all the parts.
yes, John, did not have all the parts so they substitute with something else handy beside the fact that somebody stole 2 strings and leaving only two strings left. Your future Erhu may have its "top plate" made with snake skin, python skin, perhaps, lol. Well, there were sheep guts and horse hairs for fiddles, and snake skin is also organic, right?
Have a safe trip and enjoy your time there, John.