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bpb
Joined: 01 Apr 2007
Posts: 57
Location: denmark
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| Posted: Wed Mar 25, 2009 9:59 pm Post subject: hushbox, fan modding etc problems |
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Hi Y'all,
I got a bit of a problem, got a small sony D50 which imo makes to much noise!
Has anybody fan modded a Sony D50, 70 or 90?
my other option is to make a hushbox, but thats not really a good option as i have a concrete ceiling and my neighbor probably doesn't want a 6" tube on his floor.....
is it possible to make a good improvement without tubing and fans in another room?
best regards
bent
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AFryia
Joined: 09 Mar 2006
Posts: 965
Location: S.E. Michigan VPH-G70Q
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greg_mitch
Joined: 03 May 2006
Posts: 5320
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| Posted: Thu Mar 26, 2009 12:31 am Post subject: Re: hushbox, fan modding etc problems |
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I am going to make something very similar some day but out of much thinner and lighter hardboard. Did you have a thread about this build? Any info on the exhaust port and temperature display? Very nice!
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AFryia
Joined: 09 Mar 2006
Posts: 965
Location: S.E. Michigan VPH-G70Q
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| Posted: Thu Mar 26, 2009 11:11 pm Post subject: Re: hushbox, fan modding etc problems |
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| greg_mitch wrote: | | Did you have a thread about this build? Any info on the exhaust port and temperature display? |
No I never bothered with a thread about the build just the forum pictures.
The exhaust port is here.
http://www.curtpalme.com/forum/album_page.php?pic_id=656&mode=previous
Basically lined with a medium density foam to cut down on sound reflection. A central vac uses the same technique for its' muffler.
The fans are controlled by a 12vdc PC fan speed controller made by Scythe . I use a line voltage thermostat to automatically turn the fan controller on and off based on the hush box temperature ~75 deg F.
http://www.curtpalme.com/forum/album_page.php?pic_id=655&mode=next
It controls 4 fans and reads 4 RTDs (temperature). So I can monitor temperature for the PJ direct exhaust, hush box interior, exhaust port, and the ambient room.
The box is lined with 1" OC703 rigid fiber glass and egg create foam.
The 1/2" MDF alone made an improvement. The mass helps as does the OC703. I really only used the egg create foam to keep the fiberglas fibers under cover.
That' really it.
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greg_mitch
Joined: 03 May 2006
Posts: 5320
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| Posted: Fri Mar 27, 2009 12:08 am Post subject: Re: hushbox, fan modding etc problems |
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| AFryia wrote: | | greg_mitch wrote: | | Did you have a thread about this build? Any info on the exhaust port and temperature display? |
No I never bothered with a thread about the build just the forum pictures.
The exhaust port is here.
http://www.curtpalme.com/forum/album_page.php?pic_id=656&mode=previous
Basically lined with a medium density foam to cut down on sound reflection. A central vac uses the same technique for its' muffler.
The fans are controlled by a 12vdc PC fan speed controller made by Scythe . I use a line voltage thermostat to automatically turn the fan controller on and off based on the hush box temperature ~75 deg F.
http://www.curtpalme.com/forum/album_page.php?pic_id=655&mode=next
It controls 4 fans and reads 4 RTDs (temperature). So I can monitor temperature for the PJ direct exhaust, hush box interior, exhaust port, and the ambient room.
The box is lined with 1" OC703 rigid fiber glass and egg create foam.
The 1/2" MDF alone made an improvement. The mass helps as does the OC703. I really only used the egg create foam to keep the fiberglas fibers under cover.
That' really it. |
I like the fan speed controller and the tstat, but honest question, does it run the entire time you use the projector or only after trying 1080p for a few hours?
I am thinking that I can setup a remote exhaust fan and just let it run at all times. I do like the temperature display, but I was thinking more like those BBQ remote temperature readouts. Can you give me a link to the scythe fan controller and explain how you hooked it up?
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AFryia
Joined: 09 Mar 2006
Posts: 965
Location: S.E. Michigan VPH-G70Q
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| Posted: Fri Mar 27, 2009 12:43 am Post subject: Re: hushbox, fan modding etc problems |
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| greg_mitch wrote: |
does it run the entire time you use the projector or only after trying 1080p for a few hours? |
All the time any bandwidth, it never cycles. It starts ~10 minutes after the PJ turns on. and turns off about 45 minutes after the PJ is off. It runs automatically based on the internal hush box temp.
| greg_mitch wrote: |
Can you give me a link to the scythe fan controller and explain how you hooked it up? |
The Fan controller is here...
http://www.microcenter.com/single_product_results.phtml?product_id=0281445
The way it works is the thermostat switches a standard 120V AC receptacle. Plugged into that is a 12/24vdc power supply that powers the fan control.
You need a 5/12V supply similar to this one with the 4 pin molex connector to plug directly into the fan controller. Shop around the prices vary greatly.
http://www.coolerguys.com/840556029977.html
The 4 RTDs (temp sensors) came with the fan control. I then bought 2 12VDC 120mm PC fans. The controller does PCM or variable voltage your choice.
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greg_mitch
Joined: 03 May 2006
Posts: 5320
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| Posted: Fri Mar 27, 2009 3:31 am Post subject: |
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That seems pretty economical. I am thinking an inline duct fan or something of that sort. I like to hear that it runs all the time because I was planning on just putting it on an X10 switched outlet and then it would come on whenever I turn the projector on. Don't really think I would need a delay to let it run after the PJ turns off as the fans on the PJ dont do that.
Thanks for the help! 
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bpb
Joined: 01 Apr 2007
Posts: 57
Location: denmark
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| Posted: Sat Mar 28, 2009 7:09 am Post subject: Afryia exhaust system! |
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Hi AFryia,
Thanks for the response, nice hearing there is a good solution.
You woudn't by any chance have a roughf skecht of your hushbox layout  ?
If not, it would be greatly appreciated if you could tell me how much space the fans need to work properly both behind and in front of them.
best regards
bent
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AFryia
Joined: 09 Mar 2006
Posts: 965
Location: S.E. Michigan VPH-G70Q
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| Posted: Mon Mar 30, 2009 12:10 am Post subject: Re: Afryia exhaust system! |
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| bpb wrote: | | You woudn't by any chance have a rough sketch of your hushbox layout |
This all I sketched up. I had a drawing of the mount and PJ to work with.
| bpb wrote: |
If not, it would be greatly appreciated if you could tell me how much space the fans need to work properly both behind and in front of them. |
It's not very scientific but I had 120mm fans so I ensured 120mm front and back. Seems to work well enough 
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bpb
Joined: 01 Apr 2007
Posts: 57
Location: denmark
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| Posted: Tue Mar 31, 2009 4:07 pm Post subject: |
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Thanks alot, f it works on your larger pj it should work on my junior pj;)
best regards
b
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Frank D
Joined: 20 Jun 2006
Posts: 73
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| Posted: Wed Apr 01, 2009 1:45 am Post subject: |
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A few questions AFryia:
1. Do you have glass on the front of your box? If no why not?
2. Is the only air outlet at the back? How many fans is your hush box using there?
3. Where is the incoming air coming from? Is the incoming air also fan assisted?
4. How many fans are you using in total and where have you placed them.
5. Did you do before and after hush box temperature testing? If yes what was the difference?
Great pictures. If you can post pictures relating to above questions too that would be great.
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AFryia
Joined: 09 Mar 2006
Posts: 965
Location: S.E. Michigan VPH-G70Q
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| Posted: Thu Apr 02, 2009 12:49 am Post subject: |
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| Frank D wrote: | 1. Do you have glass on the front of your box? If no why not?
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No, my PJ pulls air in through the front around the lenses.
| Frank D wrote: |
2. Is the only air outlet at the back? How many fans is your hush box using there?
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Yes, and 2 - 120mm
| Frank D wrote: | 3. Where is the incoming air coming from? Is the incoming air also fan assisted?
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No assist on the in coming except the PJ own fans (3 - 120mm)
| Frank D wrote: | 4. How many fans are you using in total and where have you placed them.
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PJ 3, hush box 2. Hush box fans are along the back of the box near the exhaust for the PJ.
| Frank D wrote: |
5. Did you do before and after hush box temperature testing? If yes what was the difference?
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Basiclly the PJ exhaust is the same as without the hush box (45 C) so no temperature rise there. The interior is ~10 deg C lower (35 C) with an ambient outside the box ~25 C.
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