Go Back   IceInSpace > Beginners Start Here > Beginners Talk
Register FAQ Calendar Today's Posts Search

Reply
 
Thread Tools Rate Thread
  #1  
Old 25-09-2006, 09:44 AM
Alderney (Dave)
Registered User

Alderney is offline
 
Join Date: Sep 2006
Location: Thornlie WA
Posts: 58
GSO 12" dob

Hi Guy's
I need a bit of help here. Never having had a scope with a fan before and after trying to read very informative instruction sheet . What do I need to drive the fan, ie batteries, battery holder and connection to base of scope. Any help would be greatfully received.
Reply With Quote
  #2  
Old 25-09-2006, 10:14 AM
ving's Avatar
ving (David)
~Dust bunny breeder~

ving is offline
 
Join Date: Nov 2004
Location: The town of campbells
Posts: 12,359
theres probably a lead coming off the fan right? a battery of some sort would attach to it

or do you not have a fan and you are making a fan for your scope?
Reply With Quote
  #3  
Old 25-09-2006, 11:58 AM
rmcpb's Avatar
rmcpb (Rob)
Compulsive Tinkerer

rmcpb is offline
 
Join Date: Jan 2005
Location: Blue Mountains, NSW
Posts: 1,766
I use one of those rechargable drycell batteries from a car parts shop. It is 12V 2.3Ah and runs a fan and LEDs all night for several nights between charges. It simply sits on my base and has velcro spots on it to fix it to the upright front board of my base. The wires from the fan loop over the front board into a connection box but you don't even need that to start.

For connections just extending your leads from the fan, putting a couple of clips on the ends and attaching them to the terminals would be crude but very effective. No switches necessary, easily done and leaves plenty of room for getting fancier later BUT it would have you up and running within 20 minutes of starting this "upgrade".

Cheers

P.S. Just make sure your fan is baffled so the air is forced around the mirror and up the tube for it to have its full effect.
Reply With Quote
  #4  
Old 25-09-2006, 12:13 PM
Lee's Avatar
Lee
Colour is over-rated

Lee is offline
 
Join Date: Sep 2005
Location: Newcastle, Australia
Posts: 2,414
What voltage does the fan need - Have a look at Jaycar or Dick Smiths or smewhere similar - they have lots of different sized battery enclosures, often with switches. I picked up one for 4*AA batteries (6V) on the weekend for about $2.....
Reply With Quote
  #5  
Old 25-09-2006, 01:51 PM
GTB_an_Owl's Avatar
GTB_an_Owl (Geoff)
bewise betold neverbecold

GTB_an_Owl is offline
 
Join Date: Jan 2006
Location: Terrigal NSW
Posts: 3,815
Hi Alderney

if your fan is like mine it has a connector (no bare wires) built in
i use one of the 12 volt battery jumper units from supercheap auto (the red one -12amp hours ? $40 last time i looked)
i think it comes with a cigarette lighter type lead that you will find does the trick (think it is meant to be used as the recharging means from the car lighter socket)
you will find other uses of power from the jumper unit down the track
Reply With Quote
  #6  
Old 25-09-2006, 02:42 PM
Alderney (Dave)
Registered User

Alderney is offline
 
Join Date: Sep 2006
Location: Thornlie WA
Posts: 58
GSO 12" dob

Thanks for the help guy's. My scope seems to have the standard fan fitted for the GSO 980 Delux from Andrews Comm (see pic)

http://www.iceinspace.com.au/forum/a...1&d=1159161520

As you can see in the pic, it has a small male type plug next to the collimation screw. What I need to know is more or less everything from what fits into the plug hole in the pic to voltage needed to make the thing spin & everything in between.
Sorry to be a pain
Attached Files
File Type: zip GS-980 fan2.zip (232.3 KB, 45 views)
Reply With Quote
  #7  
Old 25-09-2006, 02:49 PM
janoskiss's Avatar
janoskiss (Steve H)
Registered User

janoskiss is offline
 
Join Date: Jan 2005
Location: Sale, VIC
Posts: 6,033
The scope should have come with a battery pack I reckon. Others who bought fan-fitted dobs from Andrews or maybe Bintel should be able to tell you more about it.
Reply With Quote
  #8  
Old 25-09-2006, 03:14 PM
GTB_an_Owl's Avatar
GTB_an_Owl (Geoff)
bewise betold neverbecold

GTB_an_Owl is offline
 
Join Date: Jan 2006
Location: Terrigal NSW
Posts: 3,815
jumper and lead

http://www.iceinspace.com.au/forum/a...1&d=1159164983
Attached Thumbnails
Click for full-size image (power supply 001.jpg)
63.6 KB21 views
Reply With Quote
  #9  
Old 25-09-2006, 09:34 PM
ballaratdragons's Avatar
ballaratdragons (Ken)
The 'DRAGON MAN'

ballaratdragons is offline
 
Join Date: Jan 2005
Location: In the Dark at Snake Valley, Victoria
Posts: 14,412
Yep, it should have come as the supplied battery pack! Ring em up and tell em you didn't get it.

It holds 8 x AA batteries. I have had the same batteries in mine (Eveready Gold) for 18 months or more and use it regularly, and they still ain't flat!

This is the supplied GS fan battery pack below:
Attached Thumbnails
Click for full-size image (GS battery pack.jpg)
44.2 KB12 views
Reply With Quote
  #10  
Old 26-09-2006, 02:42 AM
Gargoyle_Steve's Avatar
Gargoyle_Steve (Steve)
Space Explorer

Gargoyle_Steve is offline
 
Join Date: Mar 2006
Location: Caloundra, Sunshine Coast, Australia
Posts: 1,571
Yes you should definitey have received a battery holder / power lead with the scope. The lead will plug directly into that socket. I also have an Andrew's Deluxe version GSO dob, it came with the lead too. Give them a call asap if you didn't get it.

Make sure you check that all other components have arrived too, I found a separate small cardboard box inside the main scope box that had the Deluxe "bits and pieces" in it. If you seem to be short on eyepieces, etc, check around to make sure you haven't missed it somehow.
Reply With Quote
  #11  
Old 26-09-2006, 08:07 AM
rogercrespo
Registered User

rogercrespo is offline
 
Join Date: May 2006
Location: Portugal
Posts: 6
Hello everyone,

Well i done something cool for my 12" GSO telescope! It realy cools down the temperature...

See by your eyes... Don't laugh...

Here are my fans:

http://pwp.netcabo.pt/skyatnight/fotos/26.jpg


Here is the power supply for it:

http://pwp.netcabo.pt/skyatnight/fotos/27.jpg


Hope i help someone.

Roger
Reply With Quote
  #12  
Old 26-09-2006, 10:06 AM
janoskiss's Avatar
janoskiss (Steve H)
Registered User

janoskiss is offline
 
Join Date: Jan 2005
Location: Sale, VIC
Posts: 6,033
Problem with having multiple smaller fans is low frequency vibrations from the slight mismatch in speeds between the fans. These vibrations are resonated by the air column inside the tube and adversely affect the view even at lower powers. At least that's my experience. Of course if you don't want to run the fans while observing that is not an issue. I like to keep it (just one big one) running because it helps keep dew away.
Reply With Quote
  #13  
Old 26-09-2006, 10:25 AM
rogercrespo
Registered User

rogercrespo is offline
 
Join Date: May 2006
Location: Portugal
Posts: 6
Hello,

you're right about it... But i always put the fans working one hour before i use it and if the temperature goes down in the middle of the night i make a pause and do something like eat some cookies...

I only put the fans to reduce(a lot) the mirror temperature.

cheers,

Roger
Reply With Quote
  #14  
Old 26-09-2006, 12:26 PM
Alderney (Dave)
Registered User

Alderney is offline
 
Join Date: Sep 2006
Location: Thornlie WA
Posts: 58
Thanks for posting the pic Ken, now I know what I am looking for. The scope is the one that Matt (circumpolar) sold me, so I will PM Matt to see if he still has it or not.
Thanks also to all the other guy's that posted messages.
Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 09:03 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement