Hi there, someone I know suggested I ask here:
I'm basically doing a very simple Mod to an old NAP250 which is to power the left and right hand sides of the amp seperately. I have Naim coils, 8 x BHC Aerovoxes and have wired everything up back to the DC side of the bridge rectifiers *except* the transformer!
The Naim ones have several secondaries, and differing colourings so I'm getting really confused as to wht gets wired to what. I'm not using a Thermal Trip Switch as the amp case I use has two enormous heatsinks, but thats the only thing I have left out... can anyone help me?
I've worked out that Pink is system ground and connects to the IEC Earth pin... That two of the wires are joined for 240V use... but err... thats about it.
Where I am getting stuck is the transformers have several secondaries and both have differing coloured windings, which is confusing the hell out of
me...
The transformers are Naim ones and of a different vintage, but it still looks like a rats nest in there and I want to do it right...
I hope you may be able to help as you seem very knowledgable...
Right Transformer:
===============
Red/Blue striped
Brown
Orange (rectifier AC?)
Red (rectifier AC?)
Pink (System Gnd)
Green (- on Cap?)
White (+ on Cap)
Yellow
Green+Yellow striped
Blue+Red striped/Brown (break for 110V?)
Left Transformer
=============
White
Red
Orange
Yellow
Green (it appears black but is mostly heatshrink!)
Grey
Pink (System Gnd)
Red/Blue (striped)
Red+Brown (striped)/Blue (break for 110V?)
Brown
[Edited by colin betts on 11-21-2001 at 05:19 AM]
I'm basically doing a very simple Mod to an old NAP250 which is to power the left and right hand sides of the amp seperately. I have Naim coils, 8 x BHC Aerovoxes and have wired everything up back to the DC side of the bridge rectifiers *except* the transformer!
The Naim ones have several secondaries, and differing colourings so I'm getting really confused as to wht gets wired to what. I'm not using a Thermal Trip Switch as the amp case I use has two enormous heatsinks, but thats the only thing I have left out... can anyone help me?
I've worked out that Pink is system ground and connects to the IEC Earth pin... That two of the wires are joined for 240V use... but err... thats about it.
Where I am getting stuck is the transformers have several secondaries and both have differing coloured windings, which is confusing the hell out of
me...
The transformers are Naim ones and of a different vintage, but it still looks like a rats nest in there and I want to do it right...
I hope you may be able to help as you seem very knowledgable...
Right Transformer:
===============
Red/Blue striped
Brown
Orange (rectifier AC?)
Red (rectifier AC?)
Pink (System Gnd)
Green (- on Cap?)
White (+ on Cap)
Yellow
Green+Yellow striped
Blue+Red striped/Brown (break for 110V?)
Left Transformer
=============
White
Red
Orange
Yellow
Green (it appears black but is mostly heatshrink!)
Grey
Pink (System Gnd)
Red/Blue (striped)
Red+Brown (striped)/Blue (break for 110V?)
Brown
[Edited by colin betts on 11-21-2001 at 05:19 AM]