output transformer turns per volt

ataul · 05:26 AM

Hi friends

my friend he want build a SE tube amp with 300B tube but output transformer is not available we deside to make an output transformer we have formula or idea for turns ratio for impedense but no idea that how many turns we shall wind in primery and which dia or which number of coper enamel wire we use our transformer size is 80VA chinice power transformer with good lamination black colour iron core. and if any friends have idea about it please share your experience with us.it is very kind if anyfriends reply.
sorry for bad english

Best regard

Ataul

Arnulf · 7th May 2010, 07:06 AM

1000 turns on the secondary side seems like a good starting point. You usually end up with 1000/1400 secondary and 3000+ primary.

Yvesm · 7th May 2010, 07:26 AM

Hi Ataul,

I did that :
http://www.dissident-audio.com/SE_300B/KISS/DA143.pdf
Beware ! Metric numbers !

and obtained that:

Yves.

ataul · 7th May 2010, 08:12 AM

thangs friends cannot understant about "mod"

ataul

ataul · 7th May 2010, 08:58 AM

Quote:

Originally Posted by Yvesm

Hi Ataul,

I did that :
http://www.dissident-audio.com/SE_300B/KISS/DA143.pdf
Beware ! Metric numbers !

and obtained that:

Yves.

hi Yvesm

great infformation Yvesm ,thanks

ataul

kavermei · 7th May 2010, 09:33 AM

Quote:

Originally Posted by ataul

thangs friends cannot understant about "mod"

That's just a joke. Some people cannot stop changing parts in their amplifier even when it already sounds very good.

Efren Noble · 7th May 2010, 09:36 AM

hi,
when it comes to output trannies, we have a local manufacturer here in our country, I have used this product and I can attest to the sonic as well as ruggedness. They dont use ordinary irons, otherwise your project will sound mediocre and a fire hazard as well. Here it is, performing on my tube amp, a
6F6G single ended driven by 12AV6:
[IMG]

[/IMG]
fresh from the shipment|:
[IMG]

[/IMG]

Efren Noble · 7th May 2010, 09:44 AM

by the way that was 6AR5 before I finally replaced it with 6F6G, sorry 'bout that, here it is now.
[IMG]

[/IMG]
they specialize in output as well as power trannies, I think their main office is at Switzerland, the plant is only located here in Phillipines.

ataul · 7th May 2010, 10:38 AM

Efren Noble

Nice output transformers photo, singapore is my nearest country so may i colect them from singapore.ok first i will try it to make because this is the
cheap solution, but when i will fail then i go to comertial tr

thanks

Ataul

Efren Noble · 7th May 2010, 10:49 AM

Ataul,

no problem, glad to be of help in my own little way to a fellow DIY'er,..
here's my amp driving a vintage Philips AD50600 in Onkyo D-032AX bokshelf enclosure.[IMG]

[/IMG]

Best Regards,

7th May 2010, 05:09 AM	#1
ataul diyAudio Member Join Date: Mar 2008	output transformer turns per volt Hi friends my friend he want build a SE tube amp with 300B tube but output transformer is not available we deside to make an output transformer we have formula or idea for turns ratio for impedense but no idea that how many turns we shall wind in primery and which dia or which number of coper enamel wire we use our transformer size is 80VA chinice power transformer with good lamination black colour iron core. and if any friends have idea about it please share your experience with us.it is very kind if anyfriends reply. sorry for bad english Best regard Ataul Last edited by ataul; 7th May 2010 at 05:26 AM.

7th May 2010, 07:06 AM	#2
Arnulf diyAudio Member Join Date: Feb 2009	1000 turns on the secondary side seems like a good starting point. You usually end up with 1000/1400 secondary and 3000+ primary. __________________ mod verb, transitive /mod/ to state that one is utterly clueless about the operation of device to be "modded" and into "fixing" things that are not broken; "My new amplifier sounds great so I want to mod it."

7th May 2010, 09:36 AM	#7
Efren Noble diyAudio Member Join Date: Apr 2009	hi, when it comes to output trannies, we have a local manufacturer here in our country, I have used this product and I can attest to the sonic as well as ruggedness. They dont use ordinary irons, otherwise your project will sound mediocre and a fire hazard as well. Here it is, performing on my tube amp, a 6F6G single ended driven by 12AV6: [IMG][/IMG] fresh from the shipment\|: [IMG][/IMG]

7th May 2010, 09:44 AM	#8
Efren Noble diyAudio Member Join Date: Apr 2009	by the way that was 6AR5 before I finally replaced it with 6F6G, sorry 'bout that, here it is now. [IMG][/IMG] they specialize in output as well as power trannies, I think their main office is at Switzerland, the plant is only located here in Phillipines.

7th May 2010, 10:49 AM	#10
Efren Noble diyAudio Member Join Date: Apr 2009	Ataul, no problem, glad to be of help in my own little way to a fellow DIY'er,.. here's my amp driving a vintage Philips AD50600 in Onkyo D-032AX bokshelf enclosure.[IMG][/IMG] Best Regards,

7th May 2010, 07:26 AM	#3
Yvesm diyAudio Member Join Date: Jul 2004 Location: Ardeche	Hi Ataul, I did that : http://www.dissident-audio.com/SE_300B/KISS/DA143.pdf Beware ! Metric numbers ! and obtained that: Yves.

7th May 2010, 08:12 AM	#4
ataul diyAudio Member Join Date: Mar 2008	thangs friends cannot understant about "mod" ataul

7th May 2010, 10:38 AM	#9
ataul diyAudio Member Join Date: Mar 2008	Efren Noble Nice output transformers photo, singapore is my nearest country so may i colect them from singapore.ok first i will try it to make because this is the cheap solution, but when i will fail then i go to comertial tr thanks Ataul

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