Amp6 Power Supply Options

Davet · 1st May 2006, 05:47 PM

I am completing the building of my 41 HZ Amp6. I would like to use both AC and DC for the power. I will use a switch so I switch between the two types of power sources.

I am in the USA and would like recommendations for power transformers and sources.

I read that there are current inrush issues with torroids and hum isolation with iron core transformers. What are the pros and or cons of torroids over conventional power transformers?

I am considering SLA battery, but have a car battery that I can use immediately. For DC what size battery would be advisable?

TIA

BWRX · 2nd May 2006, 01:09 PM

Good cheap toroids can be found at partsexpress.com. Look for the brand Avel Lindberg.

Toroids do have an inrush current higher than EI core transformers, but your house wiring won't have a problem with a smaller VA toroid. I have a Plitron 120VA with 22,000uF after the rectifier on each secondary and the lights in the house dim ever so slightly when I turn the supply on. A slow start circuit will never hurt but isn't really necessary for lower VA transformers.

A car battery will let you play for a long time before it needs to be charged again. Look for a sealed lead acid battery in the 8-12Ah range (I think that's what most people use).

Tekko · 2nd May 2006, 01:12 PM

You can have toroids up to about 500VA before a softstart is needed.

rho · 19th May 2006, 12:31 PM

Will a 50VA transformer be enough for an AMP6?
The amp will only power some PC-speakers. (TB W3-871s)

Tekko · 19th May 2006, 02:34 PM

Thats more than enough.

rho · 20th May 2006, 12:37 PM

How small can I go with the transformer. I'm trying to get is as small as possible in size but still want good sound quality.

1st May 2006, 05:47 PM	#1
Davet diyAudio Member Join Date: Mar 2004 Location: Reston, Virginia (surburb of Wash, DC)	Amp6 Power Supply Options I am completing the building of my 41 HZ Amp6. I would like to use both AC and DC for the power. I will use a switch so I switch between the two types of power sources. I am in the USA and would like recommendations for power transformers and sources. I read that there are current inrush issues with torroids and hum isolation with iron core transformers. What are the pros and or cons of torroids over conventional power transformers? I am considering SLA battery, but have a car battery that I can use immediately. For DC what size battery would be advisable? TIA __________________ Davet

2nd May 2006, 01:09 PM	#2
BWRX diyAudio Moderator Emeritus Join Date: Jan 2005 Location: Pennsylvania	Good cheap toroids can be found at partsexpress.com. Look for the brand Avel Lindberg. Toroids do have an inrush current higher than EI core transformers, but your house wiring won't have a problem with a smaller VA toroid. I have a Plitron 120VA with 22,000uF after the rectifier on each secondary and the lights in the house dim ever so slightly when I turn the supply on. A slow start circuit will never hurt but isn't really necessary for lower VA transformers. A car battery will let you play for a long time before it needs to be charged again. Look for a sealed lead acid battery in the 8-12Ah range (I think that's what most people use). __________________ Brian

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
UcD400 aux supply options	PWatts	Class D	6	7th July 2011 05:39 PM
power supply for 41hz amp6 basic	bull041161	Class D	3	27th April 2009 10:44 PM
UCD Supply ST Transformer Options	Juke425	Class D	0	28th July 2008 11:14 PM
Power supply options.. bigger trafo with less caps or medium trafo with heavy caps?	rhythmdiy	Chip Amps	9	23rd October 2007 01:30 AM
Gainclone power supply options/questions	trespasser_guy	Chip Amps	3	28th April 2003 03:52 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

2nd May 2006, 01:12 PM	#3
Tekko diyAudio Member Join Date: Jan 2005	You can have toroids up to about 500VA before a softstart is needed.

19th May 2006, 12:31 PM	#4
rho diyAudio Member Join Date: Sep 2003 Location: Peer, Belgium	Will a 50VA transformer be enough for an AMP6? The amp will only power some PC-speakers. (TB W3-871s)

19th May 2006, 02:34 PM	#5
Tekko diyAudio Member Join Date: Jan 2005	Thats more than enough.

20th May 2006, 12:37 PM	#6
rho diyAudio Member Join Date: Sep 2003 Location: Peer, Belgium	How small can I go with the transformer. I'm trying to get is as small as possible in size but still want good sound quality.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)