At the risk of creating offence and/or outrage to many of our HG community If you wan't your HG out of tune use Equal Temperament
If you wan't it pure, sweet and rich use Just Temperament Why don't you do what Chris Allen does and use the dimensions halfway between the 2 temperaments Then you can set either without extreme tangent angles It doesn't really make much difference after the 9th key (E), the offsets are all small after this key The tuning info is on the same resources page Graham -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Seth Hamon Sent: 08 March 2007 18:35 To: [email protected] Subject: Re: [HG] Key placement calculator This is great... So when marking where your going to put the tangents. Do you use the measurments from the Equal or the Just Temperment side... I suspect Equal... Cheers, Seth Graham Whyte <[EMAIL PROTECTED]> wrote: There is tried and tested key position calculator at http://www.hurdygurdy.org Just click on "Resources" on the home page It gives you the exact key positions for a 345mm sounding length It gives both Equal and Just temperament values for 2 octaves If you download the Excel sheet you can enter any string length Chris Allen uses these numbers for all his HGs In fact I believe he sets his keys midway between the 2 temps This means that both Just or Equal can be set with minimal tangent angles Graham Whyte -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED] Sent: 07 March 2007 23:55 To: [email protected] Subject: Re: [HG] Shaft and wheel relationship > I was going to use the Lambert plans for the body style , but incorporate the > plans from the Dewit book for all the lengths and key placements. And boy do > those plans make this insturment look tiny... Seth You may benefit from doing the math yourself for key placement - I don't recall how accurate they were. The math for each tangent placement can be worked out from first principles starting with the 12th root of 2 (because it takes twelve divisions to get to half of the string length at the 12th tangent or fret) - or you can look around online for a fret position calculator, of which there are many for aspiring guitar-builders. A typical chanter string sounding length is 344 mm. After that it's a matter of deciding where the wheel should go and how wide it should be, and doing the requisite math to get the wheel angle right so that the ears don't stick 'way out and make your gurdy look like H. Ross Perot. That's where things get REALLY interesting. There's a thought - a gurdy with the peghead carved with the likeness of H. Ross. OK, let's not go there. Alden
