[mojofml]

Just very curious to know and not that I’d dare to, or have the tools/experience, but according to this board, would resoldering the piece currently on the 120v rail to the 240v actually change the voltage requirement for this device?

[Guy]

You’d have to remove both the bridges (i.e below each 120V label) and replace across the 240V.

If you consider that the transformer winding terminals are numbered 1 to 8 from the left, then for a 240V supply you need 1 to be connected to 5 (hence the bridge), with the input supply connected to 4 and 8.

(That’s from the service manual – avail to Silver and Gold Members!)

[mojofml]

Guy wrote:

You’d have to remove both the bridges (i.e below each 120V label) and replace across the 240V. If you consider that the transformer winding terminals are numbered 1 to 8 from the left, then for a 240V supply you need 1 to be connected to 5 (hence the bridge), with the input supply connected to 4 and 8. (That’s from the service manual – avail to Silver and Gold Members!)

 

Thanks for your advice and the silver/gold material!

Is it really just as simple as that to change the voltage input?

Thanks!

[Keith Saunders]

mojofml wrote:

Is it really just as simple as that to change the voltage input?

Yes it is..

Most older B&O products use transformers with at least two primary windings. When these windings are placed in parellel then it uses 110 volts and when in series its 220 volts..

In this case they have gone beyond or extended the two primary windings to allow voltages of 100 & 120 volts with 230 & 240 volts.

[Author]

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