f5-listening-impressions-discussion
http://www.diyaudio.com/forums/pass-labs/155599-f5-listening-impressions-discussion.html
Thanks ichiban, that's the one - full of good info.
The capacitor thread is called "best electrolytic capacitors" and last post was may 20th and there was another one talking specifically about 10,000uF caps but can't find it myself, sorry - perhaps someone can assist?
The capacitor thread is called "best electrolytic capacitors" and last post was may 20th and there was another one talking specifically about 10,000uF caps but can't find it myself, sorry - perhaps someone can assist?
How does this look for part placement?
I plan on mounting a third sink for a back plate, but you get the general idea. I was thinking the thick plate in the front would be a nice mount for the heavy toroid.
Thanks,
Everett
I plan on mounting a third sink for a back plate, but you get the general idea. I was thinking the thick plate in the front would be a nice mount for the heavy toroid.
Thanks,
Everett
I wonder if the smoothing caps will run cooler if the PSU is turned upside down to place the caps in contact with the perforated bottom plate?
assuming that the top plate is not solid and there is a vent somewhere the convection upwards from the bottom though the holes will not be insignificant... I doubt that mounting the caps upside down would have any benefit compared to the work involved in doing it.
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With the correct cap voltage rating, ambient temp in unventilated box with hot heatsinks is our concern...
I'll take the dust over the heat... dust comes out with a vacuum & brush.
Cat hair? Well, that comes out too... Worst case I put the whole thing
into the tub hit it with cleaner and hose it off... once every 5-8 years if ur in a very very dusty dirty environment. I'm not. And I run electrostatic air cleaners as well...Ymmv.
if you want to get really into it, you could make a provision for a HEPA single layer material on the "intake" side (bottom) that would effectively screen out 99.9% of that stuff...
Heat and things like caps do not go together... imo.
_-_-bear
_-_-bear
In the F5 manual the power supply is shown with a 0.0033uF cap used for mains filtering.
Would it be ok to use a 0.22 uF X2 275VAC cap instead?
Does it matter much which size you use?
Would it be ok to use a 0.22 uF X2 275VAC cap instead?
Does it matter much which size you use?
Furthermore, I am most likely going to be using a 500-800VA transformer, with 230VAC primary/2 x 18VAC secondaries.
What size NTC is necessary? I am going to use the NTC in conjunction with a softstart circuit, where the NTC will act as the ballast resistor as well. The point is to make it more "safe" and fool proof. The relay would bypass the NTC putting alot less stress on it and in the event that the relay or circuit controlling the relay fails, the NTC will still be inline securing operation of the amplifier. With a fixed value ballast resistor, if the relay fails, the ballast resistor goes up in smoke, I want to avoid that situation.
Is one CL60 still enough or should I go for 2 x CL60 in series?
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Hmm, thinking more about it, a CL60 has a max steady state current of 5 A, 800 VA transformer would draw min. 3 A, wouldnt it be better with a little more margin than that?