Triad N-68X Tranny for ^SN7 Aikido?

john65b · 11th August 2009, 01:58 AM

Hello all,

I have used the 220VAC -> 110VAC Triad N-68X transformer (wired in reverse) for a preamp power supply before on a 12B4 pre, and wonder if it can be used for the 6SN7/6SN7 Aikido.

The tranny should be able to do a target of 125ma easily enough. Spec sheet is attached...

I have to run it in PSU designer, but should be around a B+ of 270V with a SS Rectifier and CRCRC filter...

I have a separate tranny for the filaments.

DigitalJunkie · 11th August 2009, 02:12 AM

It should work fine.

john65b · 11th August 2009, 02:25 AM

Good deal...thought to ask first...

john29302 · 9th March 2012, 02:44 AM

This is driving me nuts. i have a aikido preamp powered by a nx66 transformer. hooked up backwards to get 230 volts. it has a loud mechanical hum. even with no load. should i order another or what. this transformer also has a shield in the primary side that is often mistook for a center tap, it is not. so remember that what i am calling the primary is what i use as the secondary. so does anyone else have a mechanical hum? its loud enuff to hear and gets very annoying.

john29302 · 9th March 2012, 02:51 AM

oops its actually a n68x same as above and i wired it correctly. its that white wire that is the shield and it is on the secondary side and i use it as my primary side. thats what i meant anyway loud mechanical hum. do not know if its just a bad one or to order another one.

john65b · 9th March 2012, 03:16 AM

You tied red/black to yel/black and measured from Black to Green/black with 110v mains on the reds?

White does not get connected at all. Is the tranny hot?

audiohead · 9th March 2012, 04:06 AM

I use a signal transformer A-41-43-230 with the same annoying buzz issue.

Mine is a Aikido LSA/HPA board.

I have the triad toroid VPT230-220 on order from Mouser.

Art

11th August 2009, 02:25 AM	#3
john65b diyAudio Member Join Date: Jan 2005 Location: Chicago	Good deal...thought to ask first... __________________ "I speak Spanish to God, Italian to Women, French to Men, and German to my Horse" - Charles V

9th March 2012, 02:44 AM	#4
john29302 diyAudio Member Join Date: Oct 2009 Location: sc	triad nx66 This is driving me nuts. i have a aikido preamp powered by a nx66 transformer. hooked up backwards to get 230 volts. it has a loud mechanical hum. even with no load. should i order another or what. this transformer also has a shield in the primary side that is often mistook for a center tap, it is not. so remember that what i am calling the primary is what i use as the secondary. so does anyone else have a mechanical hum? its loud enuff to hear and gets very annoying.

9th March 2012, 03:16 AM	#6
john65b diyAudio Member Join Date: Jan 2005 Location: Chicago	You tied red/black to yel/black and measured from Black to Green/black with 110v mains on the reds? White does not get connected at all. Is the tranny hot? __________________ "I speak Spanish to God, Italian to Women, French to Men, and German to my Horse" - Charles V

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11th August 2009, 02:12 AM	#2
DigitalJunkie diyAudio Member Join Date: Apr 2003 Location: Portland,Oregon Blog Entries: 4	It should work fine.

9th March 2012, 02:51 AM	#5
john29302 diyAudio Member Join Date: Oct 2009 Location: sc	oops its actually a n68x same as above and i wired it correctly. its that white wire that is the shield and it is on the secondary side and i use it as my primary side. thats what i meant anyway loud mechanical hum. do not know if its just a bad one or to order another one.

9th March 2012, 04:06 AM	#7
audiohead diyAudio Member Join Date: Mar 2005 Location: Los Angeles, california	I use a signal transformer A-41-43-230 with the same annoying buzz issue. Mine is a Aikido LSA/HPA board. I have the triad toroid VPT230-220 on order from Mouser. Art

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