about to build my first set of harveys

seventynine · 10th May 2008, 12:33 PM

knocked up a quick cad model of the (almost) finished design. its still a harvey deep down, the only thing i've changed is a few aesthetic bits.........

a quick question, on the design diagram on the data sheet, one of the critical dimensions is a bit hazy, at the rear of the driver, near the back panel, it says that it needs to have a 2 6.4mm passages. but the drawing shows 7.1........... its only .7 of a mm but i beleive this is a pretty critical distance.......

seventynine · 10th May 2008, 12:36 PM

sorry, the data sheet in question

http://homepage.mac.com/tlinespeaker...ey-1v1-map.pdf

gychang · 10th May 2008, 03:11 PM

Quote:

Originally posted by seventynine

just imaginative, great project. Please many pictures as u build.

gychang

Scottmoose · 10th May 2008, 03:57 PM

1/4in = 6.350mm. Round 'er up to 6.4mm. I designed it using Imperial as I've never liked metric. The 7.1mm will be a typo.

planet10 · 10th May 2008, 04:22 PM

Brilliant.. just the kind of artistik licence we love to see. Do make sure you get sufficient bracing in the back bits and legd to keep them from ringing (that back hump is probably large enuff to stuff 1 or 2 sealed SDX7 into for some stealth bass.

dave

planet10 · 10th May 2008, 04:26 PM

Quote:

[i]Originally posted by seventynine a quick question, on the design diagram on the data sheet, one of the critical dimensions is a bit hazy, at the rear of the driver, near the back panel, it says that it needs to have a 2 6.4mm passages. but the drawing shows 7.1........... its only .7 of a mm but i beleive this is a pretty critical distance.......

The 1/4" (6.4 mm) is correct. I't looks like i mucked the drawing up a bit.

dave

loninappleton · 10th May 2008, 04:53 PM

I have my Harvey build up and connected again. Will be interested
in your progress.

One thing of note was a modding thread about making a streamlined extension on the Fostex to smooth the back wave. That looked like it would have application on your design.

Best of luck with it. I'm interested in everything Harvey. And there's a Harvey builders thread. Please consider updating to it.

Harvey Builder's Thread

seventynine · 10th May 2008, 04:55 PM

i've changed a bit of it this morning, the 'hump' will be filled with something, probably glass fibre or something to make it a bit harder. and the base is big enough for 50kg of sand to sit nicely in there so they don't fall over but more importantly give a nice solid base to damp any resonance etc.

thanks for the info in the dimension change, i used that one anyway, as it seemed the most logical

seventynine · 10th May 2008, 04:57 PM

i'll read through that now, thanks. i should be able to get cracking next week once i've got my exams out the way, i'll be using Fostex FE126's BTW

10th May 2008, 12:33 PM	#1
seventynine diyAudio Member Join Date: Jun 2006	about to build my first set of harveys knocked up a quick cad model of the (almost) finished design. its still a harvey deep down, the only thing i've changed is a few aesthetic bits......... a quick question, on the design diagram on the data sheet, one of the critical dimensions is a bit hazy, at the rear of the driver, near the back panel, it says that it needs to have a 2 6.4mm passages. but the drawing shows 7.1........... its only .7 of a mm but i beleive this is a pretty critical distance.......

10th May 2008, 04:22 PM	#5
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	Brilliant.. just the kind of artistik licence we love to see. Do make sure you get sufficient bracing in the back bits and legd to keep them from ringing (that back hump is probably large enuff to stuff 1 or 2 sealed SDX7 into for some stealth bass. dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

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10th May 2008, 12:36 PM	#2
seventynine diyAudio Member Join Date: Jun 2006	sorry, the data sheet in question http://homepage.mac.com/tlinespeaker...ey-1v1-map.pdf

10th May 2008, 03:57 PM	#4
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	1/4in = 6.350mm. Round 'er up to 6.4mm. I designed it using Imperial as I've never liked metric. The 7.1mm will be a typo.

10th May 2008, 04:53 PM	#7
loninappleton diyAudio Member Join Date: Feb 2004 Location: Appleton, WI	I have my Harvey build up and connected again. Will be interested in your progress. One thing of note was a modding thread about making a streamlined extension on the Fostex to smooth the back wave. That looked like it would have application on your design. Best of luck with it. I'm interested in everything Harvey. And there's a Harvey builders thread. Please consider updating to it. Harvey Builder's Thread

10th May 2008, 04:55 PM	#8
seventynine diyAudio Member Join Date: Jun 2006	i've changed a bit of it this morning, the 'hump' will be filled with something, probably glass fibre or something to make it a bit harder. and the base is big enough for 50kg of sand to sit nicely in there so they don't fall over but more importantly give a nice solid base to damp any resonance etc. thanks for the info in the dimension change, i used that one anyway, as it seemed the most logical

10th May 2008, 04:57 PM	#9
seventynine diyAudio Member Join Date: Jun 2006	i'll read through that now, thanks. i should be able to get cracking next week once i've got my exams out the way, i'll be using Fostex FE126's BTW

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