IXYS Bridges

raincheck · 29th July 2004, 07:44 PM

Well my 2 Soundcrafstman PCR-800 amps seem to be down to one channel.

I'm now putting my Aleph 1.2 and Aleph 5 monoblock amps on the front burner of prioritys.

Im probably using a 500 VA transformer for the Aleph 5. Ive already got the LONO 2KVA transformers for my Aleph 1.2's

I would like to use the IXYS bridges for each amp, Mike Percy offers:
20A/600V
27A/600V
68A/600V
32A/1200V
20A/2000V

Which ones would be the best choice for the Aleph 5(20A/600V??)
Aleph 1.2 (68A/600V or do i need something like the 20A/2000V because of the size of the tranny)

Thanks,
Tom

Netlist · 29th July 2004, 09:25 PM

Tom
The service manuals tell us that a 25A/400V bridge is used in both Aleph5 and Aleph1.2.
The choice is therefore obvious.
Anything equal or above that value will do the trick.
The KVA value of the trafo has nothing to do with how much voltage the bridges can handle.
Strictly spoken a double or triple value of voltage and current of the secondaries would be enough.
To be extra sure and because of the low price of bridges, most designers take a high enough value.
There is of course the subjective point of view who tells us that every rectifier will sound different…

Some people don't have as much choice as you have

/Hugo

raincheck · 30th July 2004, 01:32 AM

Hugo,
Thanks!!
I should read the schematic a lot closer b4 I ask such questions. thanks for the help.
Tom

29th July 2004, 07:44 PM	#1
raincheck diyAudio Member Join Date: Dec 2001 Location: Avalon	IXYS Bridges Well my 2 Soundcrafstman PCR-800 amps seem to be down to one channel. I'm now putting my Aleph 1.2 and Aleph 5 monoblock amps on the front burner of prioritys. Im probably using a 500 VA transformer for the Aleph 5. Ive already got the LONO 2KVA transformers for my Aleph 1.2's I would like to use the IXYS bridges for each amp, Mike Percy offers: 20A/600V 27A/600V 68A/600V 32A/1200V 20A/2000V Which ones would be the best choice for the Aleph 5(20A/600V??) Aleph 1.2 (68A/600V or do i need something like the 20A/2000V because of the size of the tranny) Thanks, Tom __________________ In The Days Before Rock 'n ' Roll

30th July 2004, 01:32 AM	#3
raincheck diyAudio Member Join Date: Dec 2001 Location: Avalon	Hugo, Thanks!! I should read the schematic a lot closer b4 I ask such questions. thanks for the help. Tom __________________ In The Days Before Rock 'n ' Roll

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29th July 2004, 09:25 PM	#2
Netlist diyAudio Moderator Emeritus Join Date: Jan 2003	Tom The service manuals tell us that a 25A/400V bridge is used in both Aleph5 and Aleph1.2. The choice is therefore obvious. Anything equal or above that value will do the trick. The KVA value of the trafo has nothing to do with how much voltage the bridges can handle. Strictly spoken a double or triple value of voltage and current of the secondaries would be enough. To be extra sure and because of the low price of bridges, most designers take a high enough value. There is of course the subjective point of view who tells us that every rectifier will sound different… Some people don't have as much choice as you have /Hugo