TBDD-500, TBDD-Rack, TB550A, TB2S

horvitz

Well-known member

Joined

Apr 3, 2010

Messages

432

Location

Beverly, MA

• Dec 25, 2011

• #1

TB550A v1.1:

TB2S Discrete Op Amp:

TBDD-500:

TBDD Rack PCB Set:

Please visit the web store at http://tbaudiogear.com/ to learn more or place an order!

To purchase the TBDD Rack PCB Set, please go directly to the product page at  http://tbaudiogear.com/product/tbdd-rack-pcb-set/

Now also on Facebook!  Come give a like for more ramblings, development pics, discussion, and nonsense.  Exciting new stuff coming up and you'll see it there first.
http://facebook.com/tbaudiogear/

  Brian

 

3nity

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Joined

Dec 30, 2005

Messages

3,642

Location

MTL, CANADA

• Dec 25, 2011

• #2

Man im saving money for this.
I might buy me one if the government doesnt throw me in jail.

 

Echo North

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Joined

Jan 21, 2006

Messages

4,452

Location

Seattle, WA

• Dec 25, 2011

• #3

Whoa!

That looks awesome!

Mike

 

F

fazeka

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Joined

Jun 3, 2004

Messages

1,196

Location

\/\//-\

• Dec 26, 2011

• #4

Paid for 2! Thanks Brian!

 

J

johnnyscotch

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Joined

Oct 2, 2008

Messages

179

• Dec 26, 2011

• #5

Cool project!

What does the "Fltr" switch do?

 

WNStudios

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Joined

Dec 22, 2011

Messages

78

• Dec 26, 2011

• #6

Absolutley beautiful, will buy a pair when Igor comes out with his mini-kit! I'm not a very experienced builder but i got a tech in the family that can help me out if i run into problems

 

horvitz

Well-known member

Joined

Apr 3, 2010

Messages

432

Location

Beverly, MA

• Dec 26, 2011

• #7

johnnyscotch said:

What does the "Fltr" switch do?

Click to expand...

Just like the vintage unit, this enables a bandpass filter from 50Hz-15kHz.  Looks like this (click to see big):



Since there are electrolytics making part of the filter here, I did a lot of work to ensure that those selected most closely resemble the performance of the vintage units.  I compared a stack of different caps in mine against 5 different vintage EQs and eventually settled on the Elnas that you'll see in the kit.

 

A

atticmike

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Joined

Oct 28, 2011

Messages

502

• Dec 26, 2011

• #8

is this lunchbox format or does it have xlr in and out along with a power in?

 

horvitz

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Joined

Apr 3, 2010

Messages

432

Location

Beverly, MA

• Dec 26, 2011

• #9

atticmike said:

is this lunchbox format or does it have xlr in and out along with a power in?

Click to expand...

It is indeed a 500 series module, so you'll need a rack of some flavor to plug it in to.

 

jordan s

Well-known member

Joined

Jun 9, 2009

Messages

174

Location

Oakland

• Dec 26, 2011

• #10

Oh sh**. Something needs to go on eBay now so I can order a pair 

 

P

pacemaker

Well-known member

Joined

Jun 8, 2006

Messages

585

Location

France

• Dec 26, 2011

• #11

Hi horvitz,
payment sent for 2 kits,
thanks for this amazing project ,
regards,
Francois

 

D

drgrateful

Well-known member

Joined

Mar 31, 2010

Messages

51

Location

Italy

• Dec 30, 2011

• #12

Hi,

payment sent for a kit! Will the gar2520 offered by ClassicAPI be OK for the TB550A?

Thanks for this great project!

Matteo

 

horvitz

Well-known member

Joined

Apr 3, 2010

Messages

432

Location

Beverly, MA

• Dec 30, 2011

• #13

Hi Matteo, thanks for your order!  That will go out today.

Yes, the gar2520 will work very well.  Remember that you'll need two of them.

Have fun with the build!

 

Whoops

Well-known member

GDIY Supporter

Joined

May 9, 2008

Messages

8,471

Location

Portugal

• Dec 30, 2011

• #14

$410 without output transformer and the two 2520 Opamps ?

Seems ridiculous expensive!

 

[silent:arts]

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Joined

Jun 4, 2004

Messages

5,235

Location

Berlin, Germany

• Dec 30, 2011

• #15

Whoops said:

$410 without output transformer and the two 2520 Opamps ?

Seems ridiculous expensive!

Click to expand...

thinking about the massive amount of Grayhills ...

 

horvitz

Well-known member

Joined

Apr 3, 2010

Messages

432

Location

Beverly, MA

• Dec 30, 2011

• #16

I agree, it is an expensive kit!  There's just plain a lot of stuff in there, those Grayhills being the most significant bit.  I should post some pics of the guts.

 

Whoops

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Joined

May 9, 2008

Messages

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Location

Portugal

• Dec 30, 2011

• #17

[silent:arts] said:

Whoops said:

$410 without output transformer and the two 2520 Opamps ?

Seems ridiculous expensive!

Click to expand...

thinking about the massive amount of Grayhills ...

Click to expand...

... Still too expensive

 

G

Grummy77

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Joined

Oct 9, 2011

Messages

46

• Dec 30, 2011

• #18

Yeah, let's see the guts! I will be down for at least two. Had some car and computer problems that have put a pinch on me $$ wise, but as soon as I can safely do so I'll be ordering a pair. I'm super pumped for these.

 

F

fazeka

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Joined

Jun 3, 2004

Messages

1,196

Location

\/\//-\

• Dec 30, 2011

• #19

Whoops said:

[silent:arts] said:

Whoops said:

$410 without output transformer and the two 2520 Opamps ?

Seems ridiculous expensive!

Click to expand...

thinking about the massive amount of Grayhills ...

Click to expand...

... Still too expensive

Click to expand...

Hey, guess what? You have an option here. Not to buy!  : Hurray!

BTW, did you ever price real 550As?

 

okgb

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Joined

Oct 18, 2004

Messages

5,889

Location

Winnipeg Mb Canada

• Dec 31, 2011

• #20

Price out the parts , and add some research & design
and decide if it's worth it to do it yourself

I don't know anyone else anyone brave enough to take on the mighty 550A , Bravo !
I'll buy one eventually , once i save up
but I never hoped to own [ or want to pay the price ] for a real 550A

And for me i think this follows where good quality D.I.Y. is usually 1/3-1/2 off
the authentic product , quality costs money , no way around it