View Full Version : Wanted: Balanced Mains Unit
Looking for a Balanced Mains Unit - anyone selling before I buy new?
Airlink 1500/2000 rated one would do nicely, or any other make would be considered.
UK Plug/Sockets.
Ta.
No-one selling Mikey, a sure sign nobodies unhappy with their purchase?
From personal experience...just get one mate.
At least a 2000 Airlink one, higher the rating the lower the impedance.
Its one of those fit n forget purchases, hardwired option is better as no fuses.
No-one selling Mikey, a sure sign nobodies unhappy with their purchase?
From personal experience...just get one mate.
At least a 2000 Airlink one, higher the rating the lower the impedance.
Its one of those fit n forget purchases, hardwired option is better as no fuses.Yeah, it's a hopeful wanted thread, can't think of seeing many, if any for sale over the last couple of years.
DiveDeepDog
24-09-2018, 00:35
There was one for sale on the Wam couple of months ago, but as suggested they seem to work as described (it's silenced a pair of 700 va transformers at mine).
One of the very few items I'd actually buy new and think of being good value.
Airlink do discounts for multiples, maybe an option for a group buy?
moodybuilder
24-09-2018, 05:52
Been looking at these but they don't seem to do any with more than 3 outlet plugs, which I presume would mean I need 2.
Ali Tait
24-09-2018, 08:19
Just plug in a mains block.
Just plug in a mains block.Yip, that's what I'll have to do if I go the Airlink route.
https://www.soundonsound.com/forum/viewtopic.php?f=15&t=54103
https://www.soundonsound.com/forum/viewtopic.php?f=15&t=54103Which I why I don't want to pay new prices, fully aware it might not make any difference, but then again it might [emoji23]
Further to my last comment, please remember this is a wanted thread, if you want to discuss the pros and cons of BMU's, best start a thread [emoji6]
Ali Tait
24-09-2018, 11:10
This is an old chestnut that has been gone over on this forum ad nauseum. I built my own BMU with two pole protection on both the primary and secondary, this makes it safe to use as any fault in the equipment will trip both legs of the supply.
The OP can specify the same from Airlink.
Ali Tait
24-09-2018, 11:12
Sorry Mike, posted while you were posting.
This is an old chestnut that has been gone over on this forum ad nauseum. I built my own BMU with two pole protection on both the primary and secondary, this makes it safe to use as any fault in the equipment will trip both legs of the supply.
The OP can specify the same from Airlink.
That's exactly what I did, based on Ali's advice.
Hi Mike
Probably more than u wanna spend but I’ve been making a bunch of balanced supplies lately after building a monster AC/DC 50kg beast for myself, I had been asked by others to do something for them. These are half that weight thankfully and less than half the size but have been going down incredibly well with people. U can’t beat a balanced supply for what it offers but most use inferior transformers and look crap to boot.
This particular one was requested with one unbalanced socket as well as five balanced ones
If anybody can make these pictures work properly, full size and not just links I’d appreciate it!
https://www.flickr.com/gp/154930806@N03/713y55
https://www.flickr.com/gp/154930806@N03/5HbrGD
https://imagizer.imageshack.com/v2/150x100q90/924/YSaOsU.png (http://imageshack.com/f/poYSaOsUp)
https://imagizer.imageshack.com/v2/150x100q90/923/xpeEHX.png (http://imageshack.com/f/pnxpeEHXp)
https://imagizer.imageshack.com/v2/150x100q90/922/r4JaAm.png (http://imageshack.com/f/pmr4JaAmp)
Hi,
looks good, pm me a price, as you say probably too dear for me but worth knowing anyway.
mike.
They must be really good [emoji23]
killie99
09-10-2018, 13:41
There's one available on gumtree in Clydebank, not too far for you to go and pick up. https://www.gumtree.com/p/other-stereo-audio/balanced-mains-unit-in-a-uk-configuration-bought-as-a-upgrade-for-my-hi-fi-and-av-system./1316569017
There's one available on gumtree in Clydebank, not too far for you to go and pick up. https://www.gumtree.com/p/other-stereo-audio/balanced-mains-unit-in-a-uk-configuration-bought-as-a-upgrade-for-my-hi-fi-and-av-system./1316569017Cool, thanks I'll check it out [emoji4]
There's one available on gumtree in Clydebank, not too far for you to go and pick up. https://www.gumtree.com/p/other-stereo-audio/balanced-mains-unit-in-a-uk-configuration-bought-as-a-upgrade-for-my-hi-fi-and-av-system./1316569017Nearly 4 hour round trip to collect so unfortunately I've had to leave that one. Bargain too [emoji849]
If that was 230 to 230 Mike it’s an isolation transformer not a balanced one anyway mate
If that was 230 to 230 Mike it’s an isolation transformer not a balanced one anyway mateAh ok I'm still confused lol
Hi Dan,
These look really good and I’d be interested to know if you can build one more and what it would cost. At the moment I have a monster 5kva exBBC balanced mains unit. It’s huge in, in double insulated steel cases, but produces too much noise from transformer hum and twin cooling fans. Ideal for an outside broadcast recording studio, but not so good in my living room. I’d want schuko outlets, ideally all six balanced.
Regards,
Dom
Floyddroid
17-10-2018, 08:51
Would one of these fettle the DC on my mains?
Would one of these fettle the DC on my mains?
If you a being troubled by DC on the mains, you can either use a DC blocker or a simple isolating transformer. There is no real need to use a 1:1 transformer with a centre tapped secondary
DiveDeepDog
17-10-2018, 18:10
Exactly what the benefits of a balanced supply are supposed to be, I'm not quite sure. If you have mains transformers that buzz I don't think a balanced supply is the answer.
My mono blocks have 700VA transformer in each and used to hum across the room, using an airlink balanced transformer has stopped the hum. I don't know why or how, and a poll of one is pretty worthless, but its worked for me.
I need to A/B more to make comment on SQ, but it certainly made the sound different.
I've another 7 transformers in my pre/dac/phono, isolating the effects may take a while :D
Never had any hum from any of my Musical Fidelity equipment but my CBS2000 Airlink Conditioning Balanced Power Supply certainly made a big improvement on dynamics and sound quality, they are a great piece of kit and fantastic value for the money
Hi Gazjam,
I read your post about ‘hard wiring’ in one of these but the photos were not there anymore - any chance if I drop you my email address you could send me some to complement the post.
Thanks.
Nige.
Hi Nige,
yeah, the photos were in Photobucket, which changed its terms and a lot of folks lost pictures.
Have them all backed up, if you give me your email I’ll see what I can do.
gaz.
Hi Gazjam,
I read your post about ‘hard wiring’ in one of these but the photos were not there anymore - any chance if I drop you my email address you could send me some to complement the post.
Thanks.
Nige.
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