Re: [ATM] Venting Holes in a solid OTA

["Jack Swaton @ Starry Host" <jswaton@starryhost.com>]

John,
OK. I'm stepping back and looking again and I think your idea is actually a
really good one. 

My design was limited to the trunk opening of a Honda Civic. I now have as
of last week a Honda Accord. I can make the OTA larger to aid in dispersing
the tube currents. Also, your suggestion of a nine-sided OTA is not as tough
as the seven-sided since Peter just reminded me that the angle is an even 40
degrees. But I think I'll look at 10 sides because of the mount (a modified
fork).

Jack

-----Original Message-----
From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net] On Behalf Of
Jack Swaton @ Starry Host
Sent: Friday, October 06, 2006 9:36 PM
To: 'John Sherman'; atm@atmlist.net
Subject: Re: [ATM] Venting Holes in a solid OTA


Good idea but execution gets a bit tougher setting the bevel to the correct
angle for nine sides. I originally did a seven sided OTA and that was just a
really tough angle!

:-)

-----Original Message-----
From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net] On Behalf Of
John Sherman
Sent: Thursday, October 05, 2006 2:18 PM
To: atm@atmlist.net
Subject: Re: [ATM] Venting Holes in a solid OTA




Hi Jack,

> keep to the "free wood is good wood" idea.

It is good indeed. Can you run the strips thru a table saw to make them 
thinner? (and lighter!) With a real thin blade you might make two strips 
from each one? Having such a narrow tube might allow enough light, but will 
force tube currents into your light path. Perhaps better to make a 
nine-sided tube with a little more breathing room.

Good luck,

John




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