8x Mur 860 strong enough for 2 paralleled 4780?

Bassterror · 6th February 2007, 03:45 PM

Hi

see topic. 2 Lm4780, each with paralleled outputs running on 25V secondarys, about 35V with a 4 Ohm load.

OK??

If not: what about RHRP 1560 (15A/600V/35ns, TO-220 compared to 8A/600V/30ns, TO-220)

What are ur experiences?

Bassterror · 7th February 2007, 08:26 PM

No Idea?

I've got 860 here, but not for both...

halo0925 · 7th February 2007, 10:46 PM

MUR860 working peak reverse voltage 600V
Average rectified forward current 8A
Repetative peak surge current 20khz square wave 16A
I think it will be plenty

worse case heat sink them

Bassterror · 7th February 2007, 11:15 PM

Hi

thanks for ur estimation.
They can handle more current then the transformer so i think the rectifier is not the first thing to start burning...

But i see man people using 8 Murs even for a single 3875

I'll try

halo0925 · 8th February 2007, 01:02 AM

They are useing dual tied rectifiers from a dual output transformer, to help stiffen and reduce 60hz humm...... most of the single chip amp power supplys like Brians or Peters work on the principle of power transformer and rectifier overkill and reduction in power supply capacitance.

6th February 2007, 03:45 PM	#1
Bassterror diyAudio Member Join Date: Mar 2006 Location: Niedersachsen	8x Mur 860 strong enough for 2 paralleled 4780? Hi see topic. 2 Lm4780, each with paralleled outputs running on 25V secondarys, about 35V with a 4 Ohm load. OK?? If not: what about RHRP 1560 (15A/600V/35ns, TO-220 compared to 8A/600V/30ns, TO-220) What are ur experiences?

7th February 2007, 10:46 PM	#3
halo0925 diyAudio Member Join Date: Aug 2006	strong enough MUR860 working peak reverse voltage 600V Average rectified forward current 8A Repetative peak surge current 20khz square wave 16A I think it will be plenty worse case heat sink them

8th February 2007, 01:02 AM	#5
halo0925 diyAudio Member Join Date: Aug 2006	mur860's They are useing dual tied rectifiers from a dual output transformer, to help stiffen and reduce 60hz humm...... most of the single chip amp power supplys like Brians or Peters work on the principle of power transformer and rectifier overkill and reduction in power supply capacitance.

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7th February 2007, 08:26 PM	#2
Bassterror diyAudio Member Join Date: Mar 2006 Location: Niedersachsen	No Idea? I've got 860 here, but not for both...

7th February 2007, 11:15 PM	#4
Bassterror diyAudio Member Join Date: Mar 2006 Location: Niedersachsen	Hi thanks for ur estimation. They can handle more current then the transformer so i think the rectifier is not the first thing to start burning... But i see man people using 8 Murs even for a single 3875 I'll try

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