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The New Modified C12-VR Thread, At Last [message #348624]

Wed, 11 June 2008 16:40

compasspnt is currently offline

compasspnt
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Well, I've been hinting and threatening for a while, but I am ready now to start the mod thread going.

Jeff Roberts will be the co-moddee for this one. He sent two VR's in, and I sent my one.

The microphones went to Mr. Oliver Archut, and were given the full Oli treatment.

New electronics, new TAB-Funkenwerk transformers, PSU mods as necessary.

I sent in a 414-EB with brass capsule, and Oliver swapped the capsules, putting my brass one into the (now) C-12, and the teflon one back into the EB (at least it's usable in a pinch...I have several other brass-CK-12 EBs already).

Oliver sent mine out for cosmetic refinishing, but Jeff can tell you what magick he did to his two.

Oh yeah, also I have no more GOLD basket!

No, I haven't heard it yet, as Oliver is still finishing, but he says it sounds very, very good. Can't wait!

However, to get things going, here is a photo of the new baby:

index.php/fa/9116/0/

index.php/fa/9116/0/

Oliver will be getting us all a schemo, should anyone want to try this on their own!

Josh, feel free to join in too!

T

Attachment: C12VR_Mod.jpeg
(Size: 278.19KB, Downloaded 1909 time(s))

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Re: The New Modified C12-VR Thread, At Last [message #348629 is a reply to message #348624 ]

Wed, 11 June 2008 17:18

Podgorny is currently offline

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Looks very nice, Terry.

How's it sound?

Kyle Mann
www.kylemann.com

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Re: The New Modified C12-VR Thread, At Last [message #348647 is a reply to message #348624 ]

Wed, 11 June 2008 17:48

jetbase is currently offline

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Shame you couldn't re-stamp that VR as OA.

So is this essentially a complete rebuild as something new (old) rather than a mod?

sleep is not an option

jwhynot: "There's a difference between thinking or acting dogmatically and drawing from experience."

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Re: The New Modified C12-VR Thread, At Last [message #348654 is a reply to message #348624 ]

Wed, 11 June 2008 18:06

compasspnt is currently offline

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Yes, in a way it's a shame that it says "VR," but it might be disingenuous to someone in future to not have that there.

And yes, it is essentially a complete new electronics, simple and direct like a real C-12, rather than a modified old VR one.

The way to properly modify the old guts is to throw them in the trash.

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Re: The New Modified C12-VR Thread, At Last [message #348671 is a reply to message #348624 ]

Wed, 11 June 2008 19:16

Greg Dixon is currently offline

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So will the power supply be completely rebuilt too? Basically it's only the body that's original now isn't it.... and even that's been refinished?

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Re: The New Modified C12-VR Thread, At Last [message #348769 is a reply to message #348671 ]

Thu, 12 June 2008 05:28

J.J. Blair is currently offline

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Terry, that's not the original grill. Where'd you get that one?

studio info

They say the heart of Rock & Roll is still beating, which is amazing if you consider all the blow it's done over the years.

"The Internet enables pompous blowhards to interact with other pompous blowhards in a big circle jerk of pomposity." - Bill Maher

"The negative aspects of this business, not only will continue to prevail, but will continue to accelerate in madness. Conditions aren't going to get better, because the economics of rock and roll are getting closer and closer to the economics of Big Business America." - Bill Graham

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Re: The New Modified C12-VR Thread, At Last [message #348786 is a reply to message #348769 ]

Thu, 12 June 2008 06:54

compasspnt is currently offline

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J.J. Blair wrote on Thu, 12 June 2008 06:28

Terry, that's not the original grill. Where'd you get that one?

Indeed. Oliver had an old one from a C-12, so we put the GOLD one to work as a strainer for tea bags.

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Re: The New Modified C12-VR Thread, At Last [message #348791 is a reply to message #348786 ]

Thu, 12 June 2008 07:12

MagnetoSound is currently offline

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compasspnt wrote on Thu, 12 June 2008 12:54

J.J. Blair wrote on Thu, 12 June 2008 06:28

Terry, that's not the original grill. Where'd you get that one?

Indeed. Oliver had an old one from a C-12, so we put the GOLD one to work as a strainer for tea bags.

Does it let the flava flood out?

Music can make me get right up out of my chair and start dancing or it can get me so pumped up I have to walk around the block.
It can also knock me back and make me sit there and cry like a little baby. This shit is as powerful as any drug!!! - Larry DeVivo

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Re: The New Modified C12-VR Thread, At Last [message #348853 is a reply to message #348624 ]

Thu, 12 June 2008 11:41

CHANCE is currently offline

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The head basket gold buffs off very easilly with a little red rouge (tripoli?) and a buffing wheel.

Chance Pataki
The Musicians Workshop
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http://www.the-musicians-workshop.com

A person is a biological signal processor--EQ mag

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Re: The New Modified C12-VR Thread, At Last [message #348937 is a reply to message #348624 ]

Thu, 12 June 2008 16:29

Billy Yates is currently offline

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Terry...
Finally the wait is nearly over. Nice, simple circuit, looks like a 5 star 6072...very good. When available, post more pics please.
I can't wait to read your review when you get it back. I have lined one up for myself rather cheaply and will proceed with the mods.
Question: Will Oliver make the transformers available to us who need them for the project?
Thanks for starting the thread, this will be a good one.
Billy Yates

Billy Yates
Venice Amplifier Co
310 425 2566
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"Mix? What mix? Oh, that mix...it's easy!
Because it's all Digital, the only thing you have to do is pour a bunch of zero's and one's into a blender and push "mix". Then, you pray."

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Re: The New Modified C12-VR Thread, At Last [message #348954 is a reply to message #348937 ]

Thu, 12 June 2008 17:36

MagnetoSound is currently offline

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Billy Yates wrote on Thu, 12 June 2008 22:29

Question: Will Oliver make the transformers available to us who need them for the project?

These (T14/1) are freely available from TAB-Funkenwerk/AMI.

Music can make me get right up out of my chair and start dancing or it can get me so pumped up I have to walk around the block.
It can also knock me back and make me sit there and cry like a little baby. This shit is as powerful as any drug!!! - Larry DeVivo

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Re: The New Modified C12-VR Thread, At Last [message #348960 is a reply to message #348954 ]

Thu, 12 June 2008 17:51

D. Uwins is currently offline

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Cool Terry. So you've basically got a near authentic C-12 at no real(excessive)additional cost!!

Good stuff. Cheers to Oliver too!

D.

http://www.myspace.com/desol777

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Re: The New Modified C12-VR Thread, At Last [message #349230 is a reply to message #348624 ]

Fri, 13 June 2008 13:39

Billy Yates is currently offline

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Looking forward to the schematic.
According to the picture it looks like pin 3 (cathode) is using a bypass capacitor.
If I am correct about this, then it's a departure from the orignal C12 schematic that I have, circa 1959. Curious.
Oliver's thoughts and details on what he did to the circuit will be interesting to be sure.
Billy Yates

Billy Yates
Venice Amplifier Co
310 425 2566
AES Member 72975

"Mix? What mix? Oh, that mix...it's easy!
Because it's all Digital, the only thing you have to do is pour a bunch of zero's and one's into a blender and push "mix". Then, you pray."

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Re: The New Modified C12-VR Thread, At Last [message #349337 is a reply to message #349230 ]

Fri, 13 June 2008 23:20

J.J. Blair is currently offline

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Billy, that's because I believe it's based on the Ela M, not the C12.

studio info

They say the heart of Rock & Roll is still beating, which is amazing if you consider all the blow it's done over the years.

"The Internet enables pompous blowhards to interact with other pompous blowhards in a big circle jerk of pomposity." - Bill Maher

"The negative aspects of this business, not only will continue to prevail, but will continue to accelerate in madness. Conditions aren't going to get better, because the economics of rock and roll are getting closer and closer to the economics of Big Business America." - Bill Graham

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Re: The New Modified C12-VR Thread, At Last [message #349396 is a reply to message #348624 ]

Sat, 14 June 2008 09:55

Billy Yates is currently offline

Billy Yates
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Registered: August 2007
Location: Venice California

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Just for clarity and comparison, here is the schematic of the C12. index.php/fa/9152/0/

index.php/fa/9152/0/

Attachment: AKG C12 sch1 copy.jpg
(Size: 481.43KB, Downloaded 1419 time(s))

Billy Yates
Venice Amplifier Co
310 425 2566
AES Member 72975

"Mix? What mix? Oh, that mix...it's easy!
Because it's all Digital, the only thing you have to do is pour a bunch of zero's and one's into a blender and push "mix". Then, you pray."

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Re: The New Modified C12-VR Thread, At Last [message #349405 is a reply to message #348624 ]

Sat, 14 June 2008 10:06

Billy Yates is currently offline

Billy Yates
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And here is the Ela M251 schematic. You can see that the cathode of the C12 is tied directly to ground, and the 251 used a cathode bias resistor and bypass cap. The circuits are similar but very different. Regardless of which circuit Oliver used in Terry's mic, I am positive it sounds terrific and way beyond the performance of the dismal VR.
It is my understanding that the Ela M251 was designed for Broadcast use and it's design was based on the C12 but quieter.
Am I correct on this? Which one is the better mic? What capsule does the 251 use?
Cherry pie or Rhubarb pie...
Billy Yates index.php/fa/9153/0/

index.php/fa/9153/0/

Attachment: Elam251-251E Schematic2 copy.jpg
(Size: 469.40KB, Downloaded 1380 time(s))

Billy Yates
Venice Amplifier Co
310 425 2566
AES Member 72975

"Mix? What mix? Oh, that mix...it's easy!
Because it's all Digital, the only thing you have to do is pour a bunch of zero's and one's into a blender and push "mix". Then, you pray."

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