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.
Senior Member
Location: Kilmarnock, Ayrshire, Scotland
Posts: 533
I'm stuart.
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.
Garrard 401, Jelco 750 with Shuggie, Ortofon 2M Black / ZYX Yatra 100, Project Phono RS with Sigma22 Linear PS, RPi3 + DigiOne + Linear PS, RPi3/1Tb SSD with PiCorePlayer + Linear PS, Perreaux Eloquence 250i 40th Anniversary with ES9038Pro DAC, DCG3 Pre-Amp, Neurochrome 8x2 Pre-Amp, Neurochrome 686 Power amp, Benchmark DAC2 HGC, Primare V25 CD player, Monitor Audio PL300, Sjostrom DCT03 DC Blocker.
Senior Member
Location: Woking
Posts: 803
I'm Chris.
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.....
System 1: - Amp - Musical Paradise MP-701 mk2 - Neurochrome 686
- Source: Audio Technica LP-5 - Custom 6V6 stage - Novafidelity X30 - Soekris 1421 (LPSU) - Custom TDA1541 C3G DAC -
- Speakers: Martin Logan Prodigy's - Subs: - REL T3's -
System 2 - Amp: Musical Paradise MP 303/Custom 300B SET - Custom 6SL7 Pre -
- Source: Pioneer N-30K - SONCOZ SGD1 -
- Speakers: Loth X BS1's - Sub: REL T3 -
Senior Member
Location: Kilmarnock, Ayrshire, Scotland
Posts: 533
I'm stuart.
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.
Garrard 401, Jelco 750 with Shuggie, Ortofon 2M Black / ZYX Yatra 100, Project Phono RS with Sigma22 Linear PS, RPi3 + DigiOne + Linear PS, RPi3/1Tb SSD with PiCorePlayer + Linear PS, Perreaux Eloquence 250i 40th Anniversary with ES9038Pro DAC, DCG3 Pre-Amp, Neurochrome 8x2 Pre-Amp, Neurochrome 686 Power amp, Benchmark DAC2 HGC, Primare V25 CD player, Monitor Audio PL300, Sjostrom DCT03 DC Blocker.
Senior Member
Location: Kilmarnock, Ayrshire, Scotland
Posts: 533
I'm stuart.
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.
Garrard 401, Jelco 750 with Shuggie, Ortofon 2M Black / ZYX Yatra 100, Project Phono RS with Sigma22 Linear PS, RPi3 + DigiOne + Linear PS, RPi3/1Tb SSD with PiCorePlayer + Linear PS, Perreaux Eloquence 250i 40th Anniversary with ES9038Pro DAC, DCG3 Pre-Amp, Neurochrome 8x2 Pre-Amp, Neurochrome 686 Power amp, Benchmark DAC2 HGC, Primare V25 CD player, Monitor Audio PL300, Sjostrom DCT03 DC Blocker.
Senior Member
Location: Kilmarnock, Ayrshire, Scotland
Posts: 533
I'm stuart.
Agree, I had the dc02 and the dc03 is better, zero buzzing now
Garrard 401, Jelco 750 with Shuggie, Ortofon 2M Black / ZYX Yatra 100, Project Phono RS with Sigma22 Linear PS, RPi3 + DigiOne + Linear PS, RPi3/1Tb SSD with PiCorePlayer + Linear PS, Perreaux Eloquence 250i 40th Anniversary with ES9038Pro DAC, DCG3 Pre-Amp, Neurochrome 8x2 Pre-Amp, Neurochrome 686 Power amp, Benchmark DAC2 HGC, Primare V25 CD player, Monitor Audio PL300, Sjostrom DCT03 DC Blocker.
Senior Member
Location: limerick
Posts: 223
I'm charles.
Hi Chris, I have sent you a PM
Senior Member
Location: limerick
Posts: 223
I'm charles.
@killie99, Hi stuart, well done on your unit. Looks interesting and may have to try assembling one when I get a gap.
Senior Member
Location: Birmingham
Posts: 144
I'm Michael.
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
Senior Member
Location: Glasgowshire
Posts: 9,666
I'm Gary.
Had a couple of Airlink Balanced units in my system over the years.Originally Posted by mbic
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.
AC POWER
Hardwired 10kVA balanced mains powering entire system
AMPS
Meridian 557 power Amp (Modded) / PS Audio BHK Preamp (Modded)
SPEAKERS
Wharfedale Evo 4.4
DAC
PS Audio Directstream (Modded)
TURNTABLE
Pro-Ject X8 balanced output via XLR / Ortofon Quintet Blue cartridge
PHONOSTAGE
Pro-Ject DS3 B balanced Input (TT and Phonostage powered by Pro-Ject Power box RS2 linear psu)
DIGITAL
OPPO 203 (Modded: Linear PSU, i2s output to Dac) - Roon Endpoint, HDMI input used for all things Streaming/ PS5 /AppleTV ... also good for movies apparently?
MUSIC PLAYBACK
Tweaked AP-Linux based Roon Server into Oppo 203 as Roon endpoint
Ipad Roon Remote.
Apple Music/ YouTube via AppleTV, fed to Dac via Oppo HDMI input/i2s output to Dac.
SPEAKER CABLES
Biwired: Duelund DCA10GA (Bass) Duelund DCA16GA (mid & treble) Duelund 12DCA used as jumpers (On "Blackcat Cable" Chris Sommivigo's advice - yup, even with biwire it sounds better - and it does)
INTERCONNECTS
All Balanced: Ghost+ recording studio XLR cables
Senior Member
Location: Valley of the Hazels
Posts: 9,139
I'm AMusicFanNotAnAudiophile.
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.
Chris
Common sense isn't anymore!
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