Testing of EHT transformers for B&W DM70 speakers

[Toppsy]

A colleague of mine who resides in London has a pair of the above hybrid electrostatic speakers.

He bought them second hand but they need some attention and repair. I have offered to rebuild the EHT boards for him but the EHT transformers really need checking out. As the postage costs are likely to be very high to send the transformers to me I was wondering if any forum member who lives in the London area could help out with testing them?

The transformers that will need testing are the eht supply transformers. These are a step up tranny that gives around 350 volts ac output for 250 volts ac input. The 350 volts ac is rectified by the diodes in the eht multiplier and stepped up to around 3500 volts dc.

If anyone can help imi out I will send you contact details and take it from there.

Thanks

Colin

[John Caswell]

Hi Colin,
Yes I can have a look at them for you/him pm me for details

John aka Dr John

[Toppsy]

Thanks John,

I did think of you, but wasn't sure how busy you were.

PM on its way.