Triad N-68X Tranny for ^SN7 Aikido? - diyAudio
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Old 11th August 2009, 01:58 AM   #1
john65b is offline john65b  United States
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Default Triad N-68X Tranny for ^SN7 Aikido?

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.
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File Type: jpg n-68x.jpg (88.8 KB, 164 views)
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Old 11th August 2009, 02:12 AM   #2
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It should work fine.
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Old 11th August 2009, 02:25 AM   #3
john65b is offline john65b  United States
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Good deal...thought to ask first...
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Old 9th March 2012, 02:44 AM   #4
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Default 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.
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Old 9th March 2012, 02:51 AM   #5
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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.
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Old 9th March 2012, 03:16 AM   #6
john65b is offline john65b  United States
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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?
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Old 9th March 2012, 04:06 AM   #7
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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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