Can I use a PC fan in my M15?

Re: Can I use a PC fan in my M15?

It is normal, that the EL84's become hot. Is your ampcase open or closed? If the back or frontside is open, don't worry about that.

I never would touch the EL's longer than 0,25 seconds... ;D

Stefan

Re: Can I use a PC fan in my M15?

Don't worry, that is OK.

Stefan

Re: Can I use a PC fan in my M15?

Hi Paul,
though you have some air ventilation at the back of your cabinet, the chassis get's pretty hot, because the tubes are heating it up, the way you've mounted the chassis. I don't think it's too much heat but if you you want to add a fan, please be aware, that the PT supplies 20V/120mA max!
Regarts,
Martin

Re: Can I use a PC fan in my M15?

Hi,

another Problem with fans is, that they generate an electric field, which can cause high frequency hum.
So it is important in which direction the fan will be mounted. So you have to try a good position befor you drill the holes for the mounting screws.

Greetings,
Oli

Re: Can I use a PC fan in my M15?

You don't necessarily need 12V to power a 12V fan. Using a lower voltage will just make the fan run a bit slower. This can actually be good, because you'll get less noise from it. So, try powering it from the heaters and you'll have plenty of current available. A simple half-wave rectifier (single diode) and a fairly big low-voltage filter cap should do the trick.