DC Blocking / Mains Filtering and all that "stuff" . . .

If you fancy a bit of DIY it's quite straightforward to make a DC blocker. I made one with 2 straight DC blocking outputs and 2 filtered DC blocking using a Sjostrom DC03 and a couple of ATL common mode (EMI/RFI) filters.

https://i.postimg.cc/jjX3bzHn/dc-block-filter.jpg

https://i.postimg.cc/bJwCNsgC/dc-block-filter-rear.jpg

Awesome,

Great work and a super neat solution.

Could well be worth a crack, cheers for that.

How much total build cost may I ask?

Nothing ventured etc.....

Think it was about £200 for the lot including the case.
Sjostrom blank board was from him on a group buy on DIY audio (about £15 I think) and the blank ATL boards were from ATL on ebay (£8 each). Parts all ordered from Mouser and case from Modushop.

I haven’t noticed any negative effects of the filters and might well be my imagination that they improve the sound. I use the filtered outputs for my power supplies (salas l-adapters) and the unfiltered output to my pre and turntable, definitely improves the pre (and stops the buzzing toroidals).
Like most things Hifi, YMMV.

Agree, I had the dc02 and the dc03 is better, zero buzzing now

Hi Chris, I have sent you a PM

@killie99, Hi stuart, well done on your unit. Looks interesting and may have to try assembling one when I get a gap.

I use an Airlink Balanced For Audio Balanced Transformer, I’m sure they will advise. I use one no buzzing, although I used solid state electronics.
Airlink Transformers website https://airlinktransformers.com/

Mike

Quote:

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Originally Posted by mbic

I use an Airlink Balanced For Audio Balanced Transformer, I’m sure they will advise. I use one no buzzing, although I used solid state electronics.
Airlink Transformers website https://airlinktransformers.com/

Mike

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Had a couple of Airlink Balanced units in my system over the years.
Its not in the listening room so noise not an issue, but did notice my previous one buzzed a bit when powering my SET 300B power amp.

No such issues now my gears all solid state.

Tried a DC blocker before, made no improvement in the buzzing.

May have been mechanical, rather than electrical...didn't check tontighten down the transformer.

Quote:

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Originally Posted by Gazjam

Had a couple of Airlink Balanced units in my system over the years.
Its not in the listening room so noise not an issue, but did notice my previous one buzzed a bit when powering my SET 300B power amp.

No such issues now my gears all solid state.

Tried a DC blocker before, made no improvement in the buzzing.

May have been mechanical, rather than electrical...didn't check tontighten down the transformer.

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I haven't noticed any buzzing around at Colin's when he's been using your old amp, and he's running an Airlink BMU with a DC blocker in the input side.