| Author |
Message |
    
Mayor513
Intermediate Member
Username: Mayor513
Post Number: 189
Registered: 3-2002
| | Posted on Saturday, April 04, 2009 - 9:47 pm: | 
|
--Hi, all. Can anyone recommend a good fan that blows out? I have an RCI-2950DX that I use for a beacon 24 hours a day, and there is one component that gets quite hot, the transistor is "Q6", and is a "B827". Right now, I am cooling the part with a nine inch fan (the bottom cover is off of the radio and the fan is simply positioned above it, blowing down). Can somebody tell me a fairly high CFM fan, 12VDC powered, 3 to 5 inches, that blows out? I plan on mounting the fan in the location of the external speaker. I will probably just cut out the metal where the speaker holes are.
--I bought a computer fan off of Ebay, but it blew in. When I went to reverse the leads to reverse the airflow, something in the fan smoked and I destroyed the fan. I figured it was like those little DC motors that go the opposite direction when the leads are reversed, but luckily, I only paid about three bucks total for the fan.
--One final thing, does it matter if the airflow flows a certain direction, or not? For some reason, I have it stuck in my head that the airflow should blow out from the radio into the room, instead of moving the air from the room into the radio. Thanks for any help. |
Tech808
Moderator
Username: Tech808
Post Number: 16764
Registered: 8-2002
| | Posted on Wednesday, April 08, 2009 - 9:00 am: |
|
Mayor513,
Go to:
Copper Talk
» Subscriber (Preview)
» Articles
» Converting an RCI 2995DX into a 10 meter beacon
You may find it very helpfull.
Lon ~ Tech808
N9CEF ~ EN50mk
|
Mayor513
Intermediate Member
Username: Mayor513
Post Number: 190
Registered: 3-2002
| | Posted on Wednesday, April 15, 2009 - 12:26 am: |
|
--Lon, thanks for that article. Nice read even if you don't have a beacon. |
Starface
Senior Member
Username: Starface
Post Number: 2403
Registered: 1-2005
| | Posted on Wednesday, April 15, 2009 - 3:21 am: |
|
Maybe you could install 2 fans side by side, 1 blowing air in and the other sucking air out.
I would somehow put a filter on the intake fan to keep dust from setting on the inside of the radio.
Just My Thoughs if it counts for anything 
73
George/KI4NBE/Starface
CEF Ø476/CVC ØØ14/CEF HAM Ø181
CEF Southeast Net Controller
|
Dale
Senior Member
Username: Dale
Post Number: 1465
Registered: 12-2002
| | Posted on Wednesday, April 15, 2009 - 9:02 am: |
|
i wouldnt have any fan blowing in.good way to collect dust in radio and in contacts.remove your speaker and custom mount a fan thier blowing out.then use a external speaker
dale/a.k.a.hotrod
cef426
cvc#64
|
|
