Aleph 0s fuse value

Sony · 27th September 2005, 02:22 PM

Greetings.

I have upgraded my Pass Aleph 0s main caps from 39uFx2 per channel to 47uFx2 per channel.

Sonic difference is interesting, but It seems the protection fuse (slow 2A, since current is 220V) gets burned quite often when I power it up. If it doesn't burn when turning the power on, it holds on during the listening sesion.

Would it be safe to replace the 2A fuse by a 3A one?

Thanks!

Netlist · 27th September 2005, 08:06 PM

It all depends on the current running through the amp.
First higher value is 2.5A and that is what I would try, assuming everything else is OK inside the amplifier.

/Hugo

wuffwaff · 28th September 2005, 09:40 AM

........or you could use a second thermistor to keep the inrush current down a bit.

William

henkel · 3rd October 2005, 05:36 AM

Are you talking about internal or external fuse?

If it's the one inside, them I am not sure, but I have used 5A fuses for the external plugs(BS type plugs) and they are O.K.

I have observed that the Aleph Os drws current consistently somewhere between 3.5-4.2A during music playback. So maybe 2A or 3A fuses are too under spec?

The manual recomends 6A fuses.

27th September 2005, 02:22 PM	#1
Sony diyAudio Member Join Date: Sep 2004 Location: Europe	Aleph 0s fuse value Greetings. I have upgraded my Pass Aleph 0s main caps from 39uFx2 per channel to 47uFx2 per channel. Sonic difference is interesting, but It seems the protection fuse (slow 2A, since current is 220V) gets burned quite often when I power it up. If it doesn't burn when turning the power on, it holds on during the listening sesion. Would it be safe to replace the 2A fuse by a 3A one? Thanks!

28th September 2005, 09:40 AM	#3
wuffwaff diyAudio Member Join Date: Aug 2001 Location: Ingolstadt Germany	........or you could use a second thermistor to keep the inrush current down a bit. William __________________ een ooievaar is geen konijn want zijn oren zijn te klein!

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27th September 2005, 08:06 PM	#2
Netlist diyAudio Moderator Join Date: Jan 2003	It all depends on the current running through the amp. First higher value is 2.5A and that is what I would try, assuming everything else is OK inside the amplifier. /Hugo

3rd October 2005, 05:36 AM	#4
henkel diyAudio Member Join Date: Aug 2005	Are you talking about internal or external fuse? If it's the one inside, them I am not sure, but I have used 5A fuses for the external plugs(BS type plugs) and they are O.K. I have observed that the Aleph Os drws current consistently somewhere between 3.5-4.2A during music playback. So maybe 2A or 3A fuses are too under spec? The manual recomends 6A fuses.

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