On Sun, Aug 5, 2018 at 08:22 AM, tom jobe wrote:
As odd as it might sound, the 2215 is very unlike the 2215A (in many ways) and
what is known about adding a simple cooling fan does not apply to the 2213 and
2215 as well as many of the other small 22xx scopes that were made around the
world.
Even common scopes like the 2213A do not have this undocumented fan circuitry
on the mainboard.
Hmmm.... yes indeed !
Just looked at my 2215... no luck, as you said... :-/
At first glance I thought I stood a chance when I spotted C965 and CR965 (but no R965 and no fan connector) on the board layout in the manual... but as it happens they have nothing to do with the fan circuitry... they are used to rectify and filter the +30V rail, bummer...
Well, the grill / vent for the fan is there none the less, so from a mechanical point of view, one could still mount a fan in there.
From an electrical point of view, we have said plenty enough in this discussion to be able to implement the required circuitry and how to wire it to the secondaries. Only a few components to mount an a tiny bit of vero board, secure it somehow in the SMPS somewhere, with adequate insulation... and you are good to go. :-)
I won't bother doing it on my scope as it's not needed... it's only a backup scope and if I ever use it, it would not be powered for any length of time... I don't let any of my gear powered up all day long, never mind over night. Plus, I have spent enough money on this budget scope already... not going to add a fan to the list.
Would be different if it were my main scope, of course... but my main scope is a 2232, and it has a fan already.
Vincent Trouilliez
Vince