The Right Tube & TRannie

IRON AND GLASS · 19th January 2012, 04:12 PM

DIY Friends, If You Please, A Question: What's the the most cost affective brand & model of transformer that will deliver an adequate heater supply to (8) 6AS7's rated @ 6.3V - 2.5A. I do not want to to use or waste any other robust trannies that I already have and need for other projects. So if You would Please bestow some of Your Prowess upon Me, I will be most grateful. Your help would most certainly be appreciated. Thanks

highfieldrebel · 19th January 2012, 04:18 PM

Hi ING, transport for transformers is costly, so it'll depend on your location I expect

ErikdeBest · 19th January 2012, 04:27 PM

Indeed, shipping is expensive, so you can better look what you can get locally. Still, 6,3V transformers are generally harder to find than for example 12V or 24V transformers, so you can consider wiring the 6AS7 in a series/parallel combination to be fed from 12V or 24V.

the_manta · 19th January 2012, 06:23 PM

New 12V 12.5A DC Universal Regulated Switching Power Supply | eBay

You can adjust the output in the 10% range. So 12.6V should be possible. Otherwise you can still reengineer the secondary side and adjust the voltage divider for the error amp for 12.6V output.

$8.99 is really hard to beat. You asked for it...

ryuji · 19th January 2012, 07:19 PM

Quote:

Originally Posted by the_manta

New 12V 12.5A DC Universal Regulated Switching Power Supply | eBay

You can adjust the output in the 10% range. So 12.6V should be possible. Otherwise you can still reengineer the secondary side and adjust the voltage divider for the error amp for 12.6V output.

$8.99 is really hard to beat. You asked for it...

I own the 15A version, it scales to 13v plus change. Reliable too. Haven't used it in new amp design but it worked great in old one

19th January 2012, 04:12 PM	#1
IRON AND GLASS diyAudio Member Join Date: Dec 2011	The Right Tube & TRannie DIY Friends, If You Please, A Question: What's the the most cost affective brand & model of transformer that will deliver an adequate heater supply to (8) 6AS7's rated @ 6.3V - 2.5A. I do not want to to use or waste any other robust trannies that I already have and need for other projects. So if You would Please bestow some of Your Prowess upon Me, I will be most grateful. Your help would most certainly be appreciated. Thanks

19th January 2012, 04:27 PM	#3
ErikdeBest diyAudio Member Join Date: Mar 2003 Location: Itoculo	Indeed, shipping is expensive, so you can better look what you can get locally. Still, 6,3V transformers are generally harder to find than for example 12V or 24V transformers, so you can consider wiring the 6AS7 in a series/parallel combination to be fed from 12V or 24V. __________________ my surname is indeed 'de Best': neither misspelling nor snobbism! Ask SY!

19th January 2012, 06:23 PM	#4
the_manta diyAudio Member Join Date: Nov 2006 Location: Munich, Bavaria	New 12V 12.5A DC Universal Regulated Switching Power Supply \| eBay You can adjust the output in the 10% range. So 12.6V should be possible. Otherwise you can still reengineer the secondary side and adjust the voltage divider for the error amp for 12.6V output. $8.99 is really hard to beat. You asked for it... __________________ Терпенье и труд все перетрут

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19th January 2012, 04:18 PM	#2
highfieldrebel diyAudio Member Join Date: May 2009	Hi ING, transport for transformers is costly, so it'll depend on your location I expect

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