Of Pipework, Pallet Magnets, And Blowers
- Posted by: joel in Projects • Sat 05 July 2008, 09:38
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Meandering through the days since I decided to start building an organ, I've been having some thoughts and purchased some materials.
First off is the pipework. While I can comfortably expect old church organ pipes to come up on eBay (and in one case an entire pipe organ - yes she'd kill me) I reluctantly came to the conclusion that I'd need to construct my own pipework. There are a few tomes out there which detail construction, of which Eric Cockayne's reference "The Fair Organ - How It Works" is the most expansive and covers a multitude of registers. Our local reference library had the self-same copy I took out in 1986 (it even had a small pencil mark of the date in my handwriting where I'd renewed it over the phone!) so that's been quite a lot of use although not brilliant.
I've been contemplating the controller. The pallet magnets to allow wind entry/exit are a lot easier than constructing the more traditional pneumatic puff-motors and are readily available on eBay, when combining these with a MIDI unit I can control up to 64 of them. I won't need that many keys of course but we'll see how it goes - I've not quite decided on the departmental configuration yet.
I've also not been quite sure about the pressure involved in the windchest (that's the bit that all the pipes sit on, and is usually pressurised with air from the blower). There's quite a bit of advice around though which states that 8WG blows your socks off, whereas many organs seem to run around the 6WG level. Experimentation is called for especially since I've not decided on how the windchest is configured either. I've found a blower in Batley (about 5 miles from us) which I think will do the job and run from a car battery.
We wandered over to a vehicle rally in Thornes Park yesterday, where I picked up a cheap glue-gun and a bench-mounted circular saw for £buggerall. That solves my wonky cutting technique on the pipework ;)
So in short, lots of ideas and no real cohesion. At this point enter the John Smith Universal Organ - or what turns out to be a set of plans and a DVD on constructing this little instrument which runs from paper roll music and is hand-cranked. I'm not really interested in the hand-cranked or paper roll aspect, although it does have a lot of measurements/construction/voicing/tuning guides for the pipework alongside all that pesky stuff about keeping pressure and building a reservoir using stuff like household chamois leathers! Result! That arrived earlier this week and I've been perusing the measurements and working out what I need to do about timber. First pipe by the end of next week hopefully, maybe mitering the bass the week after, and with any luck a set of old reed pipes will turn up on eBay before long.
I'm planning that the eventual unit will be approximately 4ft long by 3ft wide with a small undershelf for a MIDI filer and car battery (possibly next to the blower/reservoir), and mountable on a set of axles (probably old pram ones will do!). I can stick to this storage size if I make the endpieces into percussion departments (bass drum/cymbals on one size, snare on the other) which will fold in for storage/travel. The aim is that it can fit in the back of the Picasso with the seats down although I'm not overly optimistic of that.
I'm now missing: leather for the pneumatic work, tubing to carry the main wind supply, and a windchest design. The latter two need to be there before I can test and voice any pipework. I'll have to have a think about that while wandering to Wales for a 'do', probably.
First off is the pipework. While I can comfortably expect old church organ pipes to come up on eBay (and in one case an entire pipe organ - yes she'd kill me) I reluctantly came to the conclusion that I'd need to construct my own pipework. There are a few tomes out there which detail construction, of which Eric Cockayne's reference "The Fair Organ - How It Works" is the most expansive and covers a multitude of registers. Our local reference library had the self-same copy I took out in 1986 (it even had a small pencil mark of the date in my handwriting where I'd renewed it over the phone!) so that's been quite a lot of use although not brilliant.
I've been contemplating the controller. The pallet magnets to allow wind entry/exit are a lot easier than constructing the more traditional pneumatic puff-motors and are readily available on eBay, when combining these with a MIDI unit I can control up to 64 of them. I won't need that many keys of course but we'll see how it goes - I've not quite decided on the departmental configuration yet.
I've also not been quite sure about the pressure involved in the windchest (that's the bit that all the pipes sit on, and is usually pressurised with air from the blower). There's quite a bit of advice around though which states that 8WG blows your socks off, whereas many organs seem to run around the 6WG level. Experimentation is called for especially since I've not decided on how the windchest is configured either. I've found a blower in Batley (about 5 miles from us) which I think will do the job and run from a car battery.
We wandered over to a vehicle rally in Thornes Park yesterday, where I picked up a cheap glue-gun and a bench-mounted circular saw for £buggerall. That solves my wonky cutting technique on the pipework ;)
So in short, lots of ideas and no real cohesion. At this point enter the John Smith Universal Organ - or what turns out to be a set of plans and a DVD on constructing this little instrument which runs from paper roll music and is hand-cranked. I'm not really interested in the hand-cranked or paper roll aspect, although it does have a lot of measurements/construction/voicing/tuning guides for the pipework alongside all that pesky stuff about keeping pressure and building a reservoir using stuff like household chamois leathers! Result! That arrived earlier this week and I've been perusing the measurements and working out what I need to do about timber. First pipe by the end of next week hopefully, maybe mitering the bass the week after, and with any luck a set of old reed pipes will turn up on eBay before long.
I'm planning that the eventual unit will be approximately 4ft long by 3ft wide with a small undershelf for a MIDI filer and car battery (possibly next to the blower/reservoir), and mountable on a set of axles (probably old pram ones will do!). I can stick to this storage size if I make the endpieces into percussion departments (bass drum/cymbals on one size, snare on the other) which will fold in for storage/travel. The aim is that it can fit in the back of the Picasso with the seats down although I'm not overly optimistic of that.
I'm now missing: leather for the pneumatic work, tubing to carry the main wind supply, and a windchest design. The latter two need to be there before I can test and voice any pipework. I'll have to have a think about that while wandering to Wales for a 'do', probably.