Any suggestions for these trannies?

taj · 30th November 2005, 04:30 AM

Hi,

I've got four 105VCT 400VA power transformers (EI) in my junk box. Any ideas for an amp project that sould suit these?

..Todd J

mpmarino · 30th November 2005, 04:48 AM

this
or
this
maybe?

amplifierguru · 30th November 2005, 05:03 AM

Hi Todd,

If you're after 8ohm power my 300W cascode killer amp will just run on your +/-77V but would be happier if you dropped it under 75V . Maybe a soft start could consume 3 to 4V. Supplies would need to come down a fair bit (15V) for 4ohm since it's a supply efficient R2R design.

Cheers,
greg

taj · 30th November 2005, 05:55 AM

Cool. Thanks MPMarino.

Hi Greg, I need it to handle a 4-ohm load. And I haven't got a clue how I'd knock the transformer secondaries down by 15v. I'm pretty much a an electronics newbie. Maybe a ton of blue LEDs...

Worst case, I'll sell the transformers on eBay and get ones that are bit smaller (i.e. more versatile).

..Todd

30th November 2005, 04:30 AM	#1
taj diyAudio Member Join Date: Feb 2005	Any suggestions for these trannies? Hi, I've got four 105VCT 400VA power transformers (EI) in my junk box. Any ideas for an amp project that sould suit these? ..Todd J

30th November 2005, 04:48 AM	#2
mpmarino diyAudio Member Join Date: Jun 2004 Location: Crunchville, where I don't fit in.	this or this maybe? __________________ Crazy Yankee.

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30th November 2005, 05:03 AM	#3
amplifierguru Account Disabled Join Date: Aug 2004 Location: Earth	Hi Todd, If you're after 8ohm power my 300W cascode killer amp will just run on your +/-77V but would be happier if you dropped it under 75V . Maybe a soft start could consume 3 to 4V. Supplies would need to come down a fair bit (15V) for 4ohm since it's a supply efficient R2R design. Cheers, greg

30th November 2005, 05:55 AM	#4
taj diyAudio Member Join Date: Feb 2005	Cool. Thanks MPMarino. Hi Greg, I need it to handle a 4-ohm load. And I haven't got a clue how I'd knock the transformer secondaries down by 15v. I'm pretty much a an electronics newbie. Maybe a ton of blue LEDs... Worst case, I'll sell the transformers on eBay and get ones that are bit smaller (i.e. more versatile). ..Todd

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