TC Electronic Preamp problem

[KipDeluxe]

Project: TC Electronic Integrated Preamp

Source: http://www.aronnelson.com/gallery/main.php/v/slackers-stuff/tcpreboardfinal.jpg.html

Admissions: I have followed this exact layout, except for having spare columns for the first and last column to make some room for connections (so the board is a little bit wider)

Parts:
I have used the 47K pots and the values as shown in brackets.
P1 and P2 don't have the shown slope: linear instead of neglog.
Q2 is a BC550C
I have used an IC socket for IC1.
Power source is a 24VDC adapter.

Problem:
I have a guitar plugged into the input jack, and output connected to amplifier.
When I engage power, with a slight powerup delay, there is about 0.2 to 0.5 seconds of sound before all sound is gone.
When disengaging power, after 8 seconds I can hear a soft thump.
In the short period that it produces sound, there is no distortion and it sounds good.
But I would like to use the preamp longer than 0.3 seconds at a time 

Measurements:
Plug inserted into input. Adapter 24VDC on. Black meter lead to output sleeve:
Reading of meter when red lead touches:

Adapter Red: 24.2 V
Adapter Black: 0.0 V

IC1
1 = 0.0 V
2 = 23.6 V
3 = 21.2 V
4 = 0.0 V
5 = 0.0 V
6 = 0.0 V
7 = 24.2 V
8 = 0.0 V

Q1
C = 2.5 V
B = -0.3 V
E = 0.0 V

Q2
C = 23.7 V
B = 14.9 V
E = 21.0 V

D1
A = 0.0 V
K = 24.2 V

D2
A = -0.6 V
K = -0.3 V

D3
A = -0.3 V
K = 0.0 V

I know there definately is a problem.
But I can't figure out where 
Is someone able to help me?

[digi2t]

Which IC are you using? When I built mine, I had to be careful which IC I used for the 24v supply voltage. Is the IC getting hot while it's powered?

Here's my layout; http://www.aronnelson.com/gallery/main.php/v/digi2t/veros/TC_preamp/TC+Preamp+vero.jpg.html?g2_imageViewsIndex=1

Slightly different, only because I wanted to incorporate the mounting holes. I've built two though, and they both work perfectly. The original units used the LM741CN, which had a supply voltage rating up to 36v. I used a CA741T, which can go up to 44v. I think the max voltage TC spec'd for use with the preamp is 32v, which makes sense for the LM741.

EDIT: I just noticed on slackers vero, there's no indication as to which is the IC's pin 1. Could your IC be in backwards? Just spitballin' 

[KipDeluxe]

I use the recommended IC, the LM741.
It's getting a bit warm, but nothing it shouldn't be able to handle.
It's positioned so that when looking at the layout I used, the half circle and dot cutouts on the IC are at the top.
pin 1 is top left, pin 4 bottom left, pin 5 bottom right, pin 8 top right.
It's true there is no indication, so I looked up the LM741 pin usage to mount it correctly

[duck_arse]

I'd guess you're missing a bias voltage for the opamp inputs. can you show us a circuit, please?

[KipDeluxe]

It's in the OP
But here it is anyway:
http://s230.photobucket.com/user/aroundthefur444/media/TCPreampSchematic.jpg.html

[slacker]

From your voltages it looks like the feedback loop from pin 6 of the opamp, through the 220k resistor (R10) to the emitter of Q2 is broken or dodgy, check all the solder joints in that part of the circuit.

[KipDeluxe]

Thank you very very much!!
I've found the problem!!
When I was tugging the jumper (from pin 6 to R10) a bit harder, I pulled the jumper and with it the whole copper bar from the board!!

To fix it easily and quickly, I made direct connections between the parts on that line, and now it works perfectly!! 

Thanks again!! 

[digi2t]

Great news!

Enjoy it. I have two of them on my board. They're fantastic.

[slacker]

Cool, good to hear you got it working. Think I might have a go at building one.

[duck_arse]

but now you have to post your working voltages. and good work.