Arcam Delta 250 Mains Transformer problem

stevecole · 1st July 2008, 10:28 PM

I've just purchased a Delta 250 that had a major problem with its Power Supply section. The previous owner appears to have found the cause of the problem, as many of the devices have been replaced (rectifier diodes, voltage reg IC's etc), and the unit now works, but it would seem that larger of the two Mains Transformers has been fatally wounded! It gets very hot even at no-load, totally disconnected from the player.

This tranny is a custom-made job which has 3 centre-tapped secondaries, and one of these also has 2 intermediate taps. All of this is clearly going to make it rather difficult to replace. I've checked with Arcam, and they no longer have any replacements for this part. The question is, does anyone out there have a junked Delta 250 or 270 which might be able to be a transformer donor? Failing that, has someone already found a simple way of substituting several 'standard' transformers (i.e. stock units from RS Comps etc) to get the thing working again?

Roar Malmin · 2nd July 2008, 02:15 PM

I have several of these sitting on my shelf. There are two transformers in this unit. Which of them are broken? The big or the small one.

You may contact me directly if you want to.

Regards
Roar

stevecole · 3rd July 2008, 09:57 AM

Hi There

Thanks for your interest. The transformer I need is the big one.

Cheers

Steve

Roar Malmin · 3rd July 2008, 05:26 PM

I guess you will have to provide me with an address then, eh Steve?

Regards
Roar

stevecole · 3rd July 2008, 09:05 PM

Hi Roar

Have sent you an Email.

Regards

Steve

1st July 2008, 10:28 PM	#1
stevecole diyAudio Member Join Date: Apr 2008	Arcam Delta 250 Mains Transformer problem I've just purchased a Delta 250 that had a major problem with its Power Supply section. The previous owner appears to have found the cause of the problem, as many of the devices have been replaced (rectifier diodes, voltage reg IC's etc), and the unit now works, but it would seem that larger of the two Mains Transformers has been fatally wounded! It gets very hot even at no-load, totally disconnected from the player. This tranny is a custom-made job which has 3 centre-tapped secondaries, and one of these also has 2 intermediate taps. All of this is clearly going to make it rather difficult to replace. I've checked with Arcam, and they no longer have any replacements for this part. The question is, does anyone out there have a junked Delta 250 or 270 which might be able to be a transformer donor? Failing that, has someone already found a simple way of substituting several 'standard' transformers (i.e. stock units from RS Comps etc) to get the thing working again?

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2nd July 2008, 02:15 PM	#2
Roar Malmin diyAudio Member Join Date: Jul 2006	I have several of these sitting on my shelf. There are two transformers in this unit. Which of them are broken? The big or the small one. You may contact me directly if you want to. Regards Roar

3rd July 2008, 09:57 AM	#3
stevecole diyAudio Member Join Date: Apr 2008	Hi There Thanks for your interest. The transformer I need is the big one. Cheers Steve

3rd July 2008, 05:26 PM	#4
Roar Malmin diyAudio Member Join Date: Jul 2006	I guess you will have to provide me with an address then, eh Steve? Regards Roar

3rd July 2008, 09:05 PM	#5
stevecole diyAudio Member Join Date: Apr 2008	Hi Roar Have sent you an Email. Regards Steve

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