Anyone know what exact fan the player was designed to take was and why the fan header is double +V.

By the way ADDA do some very small 20mil fans.
So having one blow and one suck is possible (Ducting required)

Thanks

The player was not designed to take a specific fan. In fact, it wasn't really designed to take a fan at all.

Yes, there's a pair of pins marked "fan". Yes, the ventilation holes in the top are positioned so that you could mount a fan there if you wanted to. Those were put into the design "just in case", but were never used.

You're looking for some kind of specification as to exactly what fan to buy. There isn't such a specification. What you're looking for is any 40mm fan that's narrow enough to clear the drives and meets your personal noise requirements.

But IIRC, pca said at the Amersfoort meet (the empeg with the remote display and video had to have a fan to keep it cool) that the fan they'd had in mind was from Farnell, and that was what was in that empeg. Very slim, picture here.

Might try asking pca for the article number...

/Michael

Any slim fan will work, but a Farnell or Jameco part number would be nice...

306-2600 - 40mm x 40mm x 6mm fan, 5V operation, 2.6 l/s flow.
306-2612 - 40mm x 40mm x 6mm fan, 5V operation, 2.07 l/s flow, low noise.
306-2624 - 40mm x 40mm x 6mm fan, 5V operation, 1.66 l/s flow, super low noise.

In the current farnell catalogue, these are all £8.61 ea. The first one is what I use for the graphics board upgrade, tapped into the 5V supply on the upgrade board. Note that these fans have absolutely NO reverse polarity protection. Connect them backwards and you're out one fan. Dammit.

The fan can be held in very easily with the same plastic rivets that were used on the power devices on the Mk1 player. These are in packs of 100, farnell number 722-4321, £2.91 per pack.

pca

I just ordered Jameco #207052. Its 1.6 X 1.6 X .25 (inches obviously). Very small fan with a rating of only 25dBA. Should do the trick, as it was the smallest fan I could find that would serve my purposes.

Thanks, Patrick, that information has been added to the FAQ.

You might be rather annoyed to know that Farnell no longer deals privately in amounts under 100 pounds sterling...

If you have an account with them they don't seem to mind - I regularly order small items from them. Opening an account is relatively hassle free (or used to be anyway).

Rob

I wonder what my Radio Shack (it took a little messing of the display board and hard drive rack to install it) fan would do when hooked to 5v instead of 12v? Quiet right down and hopefully not to zero rpm.

7V is widely regarded as a good compromise between speed and noise in a PC situation - I believe you can get it by hooking negative up to 5v and positive up to 12v - the difference gives 7v across the fan.

Don't do this without testing it on a powersupply first though, or waiting for someone more knowledgeable than me to state whether this does work, or will end up blowing something vital

Cheers,

A.

While this will work in most cases, it's not good practice (sp: practise??). What you are doing by using the difference between outputs of two supplies is sourcing current from the 12v supply and relying on the 5v supply to sink that current.

In the case that the 5v supply is sourcing a lot of current relative to the fan current to other devices, you'll probably get away with it since the other devices will sink the current rather than the power supply. There then becomes the issue of how well the 5v supply will regulate in this situation.

I have recently bought the papst 412FH fan 40x40x10 mm 12Vdc ( http://www.papst.de/pdf_dat_e/S11gb.pdf )
I've no idea what the noise is that it make's but I can't here it when it's in the car and I when the Empeg is on the table there is some noise but that doesn't bother me. (The data sheet states it make's 29dB(A) )
They now also have an online shop but I don't know if it's world wide....
For the people in the Netherland check out www.alternate.nl they sell them for EUR 14,-
Other country's may have an own alternate website/shop, germany for instance.

Greetings, Robert

any slim fan will work, but a Farnell or Jameco part number would be nice...

Here is a Mouser part number for an ADDA 40x6 12v. They also carry 40x6 5v further down the page...

http://www.mouser.com/index.cfm?handler=displayproduct&&lstdispproductid=496915

BTW, I connected to the header using a drive jumper. Pulled off the jumper's plastic case, soldered the wire on, replaced the case and now the jumper slides snugly onto one of the header pins.