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.......
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
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.......
sorry, the data sheet in question
http://homepage.mac.com/tlinespeakers/FH/download/Harvey-1v1-map.pdf
http://homepage.mac.com/tlinespeakers/FH/download/Harvey-1v1-map.pdf
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.
http://www.diyaudio.com/forums/showthread.php?s=&threadid=111612&highlight=
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.
http://www.diyaudio.com/forums/showthread.php?s=&threadid=111612&highlight=
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
thanks for the info in the dimension change, i used that one anyway, as it seemed the most logical
so 5 years later i finally built SOMETHING, obviously things moved on since then, and since i had the Fostex sat under my bed i figured i'd better do something 
seemed to make sense to do the FH Mk3's after an evenings reading, but with a slight twist
tesselated them onto a sheet of 4x8 and had them cut
the slight twist was that i wanted a bit more weight to them, so decided to put an extra pocket in the bottom to accomodate half a bag of sand...
figured i'd biwire some CAT5e for the wiring, after spending ages looking at binding posts and not finding anything that took my fancy for the price range i decided to leave them out
bit of wadding
and in goes the sand
and a bit of vinyl -
5 years later we have some speakers :lol:
blown away with the sound those little drivers can make
seemed to make sense to do the FH Mk3's after an evenings reading, but with a slight twist
An externally hosted image should be here but it was not working when we last tested it.
tesselated them onto a sheet of 4x8 and had them cut
An externally hosted image should be here but it was not working when we last tested it.
the slight twist was that i wanted a bit more weight to them, so decided to put an extra pocket in the bottom to accomodate half a bag of sand...
figured i'd biwire some CAT5e for the wiring, after spending ages looking at binding posts and not finding anything that took my fancy for the price range i decided to leave them out
bit of wadding
and in goes the sand
and a bit of vinyl -
5 years later we have some speakers :lol:
blown away with the sound those little drivers can make
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