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Fairchild 670...Reborn!! Dynamics Processors (HW)
Old 30th March 2013
  #1
Gear Maniac
 
Kore's Avatar
 

Thread Starter
Fairchild 670...Reborn!!

Hey Guys,

Very excited to take delivery of a brand new Fairchild 670 remake. The unit was designed and built for us by Pierre Oliver Margerand of Pom Audio design. We are calling it the Mark II.

The idea was to take the classic 670 sound and add some modern designs to make it more versatile. All tubes are jj electronic 6386 remakes, with a utc input transformer, plus a specially commissioned direct copy of the original output transformer. The new mods we have added to the design include:

- True Bypass.

- Low frequency sidechain filtering at 90 and 180 hz, plus a smiley face curve, which only allows the midrange frequencies to trigger compression.

-Parallel mix control to blend the wet / dry signals. These appear as seperate outputs on the rear of the unit, so that you can choose to use the original output circuitry if you want to be really purist!

The result is a monster compressor, with all the spirit of an original, plus an amazing range of tweakable options. We've only had it a day but its already clear that this thing is very special. A combination of sidechain filtering, plus dialing back in some uncompressed signal, gave a sound on a pair of drum room mics unlike anything I've heard before. Its already straight into action for a vocal session today, but once the studios get quieter I'll try and get some files up for people to check out.

Enjoy the below pics

G.
Kore Recording Studios, London, UK.
Welcome to Kore Studios, recording studio, West London
Attached Thumbnails
Fairchild 670...Reborn!!-photo-7-.jpg   Fairchild 670...Reborn!!-photo-6-.jpg   Fairchild 670...Reborn!!-photo-5-.jpg   Fairchild 670...Reborn!!-photo-4-.jpg   Fairchild 670...Reborn!!-photo-1-.jpg  

Fairchild 670...Reborn!!-photo-9-.jpg  
Old 30th March 2013
  #2
Gear Head
 

That's just... I mean... oh my.... wow. Any chance we can hear this thing at work?
Old 30th March 2013
  #3
Gear Maniac
 
Kore's Avatar
 

Thread Starter
Thanks!

Thanks alot! Definetly, i'll try and get some files up next week when the current booking ends.
Old 31st March 2013
  #4
H89
Gear nut
 

Wow, it looks stunning! Can't wait to hear it!

Price tag/availability?
Old 31st March 2013
  #5
Gear Guru
 
Drumsound's Avatar
Wowser
Old 31st March 2013
  #6
Gear Maniac
 
Kore's Avatar
 

Thread Starter
Kore Fairchild

Price tag in the UK is around £6000. Availability wise you'd have to speak direct to Pom as they are very labour intensive and he works on them around other jobs. If you send me a pm I can put you in touch.
Old 31st March 2013
  #7
Gear maniac
 

Haha, a band I've worked with loads are in your studio right now. I saw one of them post a photo of a fairchild re-issue and I was like "what is that compressor, doesn't look like any fairchild I've seen before"!

Old 31st March 2013
  #8
Gear Maniac
 
Kore's Avatar
 

Thread Starter
Ha! Forgot to mention, if you put some fruit on it that makes it sound even better!
Old 31st March 2013
  #9
Lives for gear
 
nickelironsteel's Avatar
 

explain "specially commissioned direct copy of the original output transformer" a bit please
Old 31st March 2013
  #10
Gear Maniac
 
Kore's Avatar
 

Thread Starter
Transformer

Because the original output transformer is no longer available, Pom the designer had a copy made. From the tests he ran on this and the original 670 he uses the two matched up exactly. I'm not super technical so you'd have to speak to him if you need more in-depth info!
Old 31st March 2013
  #11
Porn Audio Design...? sure gives me a boner
Old 31st March 2013
  #12
Village Idiot
 
Labs's Avatar
 

Quote:
Originally Posted by Lindell View Post
Porn Audio Design...? sure gives me a boner
I wasn't the only one then....great!

Gustav
_______
Build your own gear
Old 31st March 2013
  #13
Lives for gear
 
Wiggy Neve Slut's Avatar
 

Quote:
Originally Posted by Kore View Post
Because the original output transformer is no longer available, Pom the designer had a copy made. From the tests he ran on this and the original 670 he uses the two matched up exactly. I'm not super technical so you'd have to speak to him if you need more in-depth info!
Note sure if this is Internet here say but I've been told and read a few times that the biggest issue in the Xformers was the actual materials used in the windings. This has historically prevented a like for like copy as there were some metals and processes used in the cores production that are now prohibited to be undertaken as part of a more 'greener' manufacturing regime world wide.

Not sure how true but I can see like Neve repo's that this is a crucial ingredient in the mix and scheme of things when trying to nail 'that sound'!

Any truth here or just WWW BS?

Wiggy
Old 31st March 2013
  #14
Lives for gear
 
Ward Pike's Avatar
That's on the list now!!!
Old 31st March 2013
  #15
member no 666
 
Fletcher's Avatar
How appropriate to read this post on Easter... the only question is how does it stack up to the other half dozen or so clones that are out there? Its certainly a good bit less expensive than most of the others... which makes me wonder if the manufacturer is cutting corners or is just clueless about price formulas [which isn't really a bad thing unless you'd like them to keep manufacturing stuff for more than a couple of years].

Peace
Old 31st March 2013
  #16
Lives for gear
 

Quote:
Originally Posted by Fletcher View Post
How appropriate to read this post on Easter... the only question is how does it stack up to the other half dozen or so clones that are out there? Its certainly a good bit less expensive than most of the others... which makes me wonder if the manufacturer is cutting corners or is just clueless about price formulas [which isn't really a bad thing unless you'd like them to keep manufacturing stuff for more than a couple of years].

Peace
The Undertone audio Fairchild is nearly half this price..

UnderToneAudio
Old 31st March 2013
  #17
Gear Addict
 
elamberth's Avatar
The original had 20 tubes. Not sure, but to me it didn't look like there were 20 tubes in there.
Doesn't mean it's bad, just maybe not a perfect recreation.
It may be even better; there have been some improvements in electronics since then.
I am a big fan of new, modern versions of classic gear.
DW Fearn, AEA, pendulum audio, etc.
But, if there are some differences, then it may explain the price; perhaps this incarnation is not as expensive
to build.

Pendulum audio's ES-8 is a modern take on the 670. I have it & love it.
It's even less than the Fairchild re-issue and as been around a while.
Old 31st March 2013
  #18
Lives for gear
 
DaveUK's Avatar
Yummy
Old 31st March 2013
  #19
Lives for gear
 

Looks neat! How does he get away with putting "fairchild" on the front?
Old 31st March 2013
  #20
Gear Maniac
 
bukarin's Avatar
 

Pom is a very well respected tech in London who looks after some serious vintage equipment, his website is well worth a look!!
Old 31st March 2013
  #21
Old 31st March 2013
  #22
Lives for gear
 
Ward Pike's Avatar
Old 31st March 2013
  #23
Lives for gear
Quote:
Originally Posted by elamberth View Post
The original had 20 tubes. Not sure, but to me it didn't look like there were 20 tubes in there.
Doesn't mean it's bad, just maybe not a perfect recreation.
It may be even better; there have been some improvements in electronics since then.
I am a big fan of new, modern versions of classic gear.
DW Fearn, AEA, pendulum audio, etc.
But, if there are some differences, then it may explain the price; perhaps this incarnation is not as expensive
to build.

Pendulum audio's ES-8 is a modern take on the 670. I have it & love it.
It's even less than the Fairchild re-issue and as been around a while.
6386 tube is a double triode. But you are right, still something's missing...

Sent from my SGP321
Old 31st March 2013
  #24
Gear Maniac
 
Kore's Avatar
 

Thread Starter
Hey guys, thanks for all the interest.

First up, if you check my original post I don't ever claim this to be an identical clone of the original. The brief was to make a fairchild as if it were 2013 and not the 1960s. As a previous poster states there are ways of circumventing elements of the original design that wouldn't have been possible then, eg using solid state to regulate the power supply and not tubes. Where this recreation differs from other remakes is that Pom has stayed as true to the original audio path as possible, in terms of the tubes and transformers. The output transformer in particular is unique at this point in time, but I'm pretty sure he's not going to be keen to give away too much info on that!

For those in the Uk who know him Pom is one of the most respected vintage gear techs around, and also extremely familiar with the fairchild sound and pedigree. He takes his time to make these, and you can expect him to be jumping between this and the mountain of other restoration work he gets, but my god, when you plug this baby in its well worth the wait!!!
Old 31st March 2013
  #25
Lives for gear
wow, must be the last guy on earth servicing GML faders.
Old 31st March 2013
  #26
Gear maniac
 
radiovoiceone's Avatar
 

There's no one from the original company left to sue anyone.
The Fairchild name and log appears on many clones including faceplates and cases made for the DIY community.
Old 1st April 2013
  #27
Gear Maniac
 
Kore's Avatar
 

Thread Starter
Hey guys,

A few more details in response to some of the questions received on here.

- The Mk2 uses the same audio path as the original, but it uses a discrete solid state control amp instead of a valve one.

- It uses a regulated discrete power supply, as opposed to a regulated valve one, hence the cost saving and less valves.

- It uses the same concept as the EAR 660, but the audio path is 100% original.

- Pom can offer a handmade output transformer, which has the right 50s laminations and winding specs.

Hope that helps. Cheers!
G.
Old 1st April 2013
  #28
Lives for gear
 
nickelironsteel's Avatar
 

whats the advantage of this lets say to a DRIP 670?
Old 2nd April 2013
  #29
FAIRCHILD 670mkI and mkII

Quote:
Originally Posted by Fletcher View Post
How appropriate to read this post on Easter... the only question is how does it stack up to the other half dozen or so clones that are out there? Its certainly a good bit less expensive than most of the others... which makes me wonder if the manufacturer is cutting corners or is just clueless about price formulas [which isn't really a bad thing unless you'd like them to keep manufacturing stuff for more than a couple of years].

Peace
Hi,

I have only been making 6 FAIRCHILD copies since 2011, my idea is to provide the same sound as the original by simply using the same audio path, nothing special :
You just need the original UTC input transformer followed by the four 6386 valves in parallel and the Triad output transformer, on each channel.
You can see a few pictures on my FAIRCHILD website here if you like :
Pictures and links

All I did is the same principle as the EAR 660: I use a Discrete Power Amp instead of a Valve one to generate the Control Voltage, which saves 8 valves.
My control Amp has the same topology as the original : Input and an Output transformer and behaves the same. The good thing about using a discrete Power Amp is that you can do whatever you like, you can have extremely low output impedance, less than an Ohm should you require it, a very large output swing if you need to slam the signal big time, and you can shape up the response to whatever you require easily, hence the new improvements on the mkII on the side chain...

On the power supply side : Let's remember that the original 240V high voltage PSU is totally regulated and fixed, so again, there is no need to use 4 valves to produce a perfectly regulated 240V powers supply, it can be done easily with a few reliable discrete components that will performed well virtually forever and with less noise...

So the total saving is 12 valves, making the grand total only 8 x 6386 instead of 20 valves!

All the people who bought my FAIRCHILD re-make over the past few years all got 50s and 60s transformers that I bought on the US second hand market, so the sound is as original as possible but with new valves.

KORE studio in LONDON is the first commercial place(not private owners in their rooms)where people will be able to hear the new mkII which has a pair of late 1950 UTC on the input, and a hand made Output transformer that I decided to try after having long conversations about bobbins, laminations, nickel alloys from the 50s with a retired transformer specialist who said that he could produce the same transformer for me without a problem... I hope I can get some more of him now before he dies! ahahah!

Other than Audio tests, the electronic tests I made had quite impressive results and showed the right phase response and characteristic. I am quite amazed and happy to use this hand made transformer when there is nothing on the US second hand market, and as long as my clients are perfectly aware of it, it's just fantastic, just come and hear it at KORE!

Thanks for reading, I hope this helped clarify a few bits.

POM
POM Audio Design
http://fairchild-recording-equipment.com/

Last edited by POM AUDIO DESIGN; 2nd April 2013 at 12:47 AM.. Reason: spelling mistake
Old 2nd April 2013
  #30
Fairchild recording equipment corporation

Quote:
Originally Posted by gogar View Post
Looks neat! How does he get away with putting "fairchild" on the front?
Hi,

I incorporated Fairchild Recording Equipment Corporation last year and I am the managing director/CEO, so I thought it would be a good idea to use the same name on my machines which are not a replica of the 50s machine anyway...
Topic:
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