45V transformer okay for ZapPulse 2.3SE?

Tenson · 21st July 2006, 12:07 PM

Hi,

I just received a pair of 2.3SE's and an extended Predator PSU but rather than pay for import of the transformer I was hoping to buy one from RS. The LC Audio ones are 42V but the only ones I can find on RS are 45V, will this be alright or will it trip voltage overload since the PSU is already the 'extended' 80V one??

Thanks

richie00boy · 21st July 2006, 12:16 PM

I bought a 2x45V 500VA (mono amp) one from Farnell, works lovely for me. Didn't bother with the Predator though so can't comment on suitability for that. Just check it has 80V caps.

45V transformer will yield under 64 volts ignoring diode losses, so will be a touch lower in practice.

KeithC · 21st July 2006, 12:20 PM

I bought a 40V 625VA from RS last month

Tenson · 21st July 2006, 12:36 PM

Thanks I thought it would be alright but wanted to check. Is there a neat rule of thumb for what a AC voltage will be when rectified to DC?

richie00boy · 21st July 2006, 12:47 PM

Yes and I'm surprised you haven't found these kinds of basic facts out before building a very high power amplifier

DC = 1.414 x AC

Tenson · 21st July 2006, 01:03 PM

Its just one of those things that has always bugged me and I couldn't find much on google surprisingly. Besides the LC Audio modules are not complex. If I wear my full latex body suit I'm sure I'll be fine!

Duck-Twacy · 21st July 2006, 04:28 PM

With the extended predator you should be able to use toroids up to 55 V AC secondairy. 45V or 50V AC is not a problem.

21st July 2006, 12:07 PM	#1
Tenson diyAudio Member Join Date: Feb 2006 Location: Kent	45V transformer okay for ZapPulse 2.3SE? Hi, I just received a pair of 2.3SE's and an extended Predator PSU but rather than pay for import of the transformer I was hoping to buy one from RS. The LC Audio ones are 42V but the only ones I can find on RS are 45V, will this be alright or will it trip voltage overload since the PSU is already the 'extended' 80V one?? Thanks

21st July 2006, 12:16 PM	#2
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	I bought a 2x45V 500VA (mono amp) one from Farnell, works lovely for me. Didn't bother with the Predator though so can't comment on suitability for that. Just check it has 80V caps. 45V transformer will yield under 64 volts ignoring diode losses, so will be a touch lower in practice. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

21st July 2006, 12:47 PM	#5
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	Yes and I'm surprised you haven't found these kinds of basic facts out before building a very high power amplifier DC = 1.414 x AC __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

21st July 2006, 04:28 PM	#7
Duck-Twacy diyAudio Member Join Date: Oct 2002 Location: Holland, The Hague	With the extended predator you should be able to use toroids up to 55 V AC secondairy. 45V or 50V AC is not a problem. __________________ Is that all there is?

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21st July 2006, 12:20 PM	#3
KeithC diyAudio Member Join Date: Sep 2005	I bought a 40V 625VA from RS last month

21st July 2006, 12:36 PM	#4
Tenson diyAudio Member Join Date: Feb 2006 Location: Kent	Thanks I thought it would be alright but wanted to check. Is there a neat rule of thumb for what a AC voltage will be when rectified to DC?

21st July 2006, 01:03 PM	#6
Tenson diyAudio Member Join Date: Feb 2006 Location: Kent	Its just one of those things that has always bugged me and I couldn't find much on google surprisingly. Besides the LC Audio modules are not complex. If I wear my full latex body suit I'm sure I'll be fine!

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