SE Electronics Z3300a

[Emmathom]

Update... so everything seems ok to you ?

maybe a little "tweak" : the 4,7uF tantal. could maybe be replaced by a "better" one ? it is on the signal path...

 

[micolas]

Update... so everything seems ok to you ?

maybe a little "tweak" : the 4,7uF could be replaced by a "better" one ? it is on the signal path...

your schema is wrong

 

[Emmathom]

your schema is wrong

damn...

 

[micolas]

C3=470uF/50v

 

[Emmathom]

.

ok let me study yours...

 

[micolas]

ok let me study yours...

Ok,
also take inspiration from the mxl 2001 basic scheme, but which does not have a DC/DC converter, not have hi-pass, and have de-emphasis

 

[Emmathom]

I noted the diagram (3 times and carefully !) and shared 3 images with you:
- the front and back card > BUT the back card (right) is flipped verticaly so that left corresponds to left, right to right (board-1)
- the same visual with the tracks and components values (board-2)
- the same visual as board-2 but with just "the diagram" as it is on the card (board-3)
- the diagram transcribed from my statement
I hope it will be clear and easy to read...

* I add board-4 to be more clear... same side = side by side

 

[micolas]

I noted the diagram (3 times and carefully !) and shared 3 images with you:
- the front and back card > BUT the back card (right) is flipped verticaly so that left corresponds to left, right to right (board-1)
- the same visual with the tracks and components values (board-2)
- the same visual as board-2 but with just "the diagram" as it is on the card (board-3)
- the diagram transcribed from my statement
I hope it will be clear and easy to read...

* I add board-4 to be more clear... same side = side by side

Hi!
The scheme drawn by you is not entirely correct.
I have drawn the audio circuit diagram for you.
I'm sorry, I can't deal with this problem today anymore, I need to rest and calm down.
I have a doctor's appointment tomorrow. I have serious medical problems.
I recommend you to rest, relax, spend time with your family.
With a rested mind you will see things more clearly.
We are not robots.

 

[Emmathom]

Thank you micolas.
Sorry for your medical problems... Yes, life is tuff sometimes and we got to take care of ourselves !
Have a nice evening

 

[micolas]

Thank you micolas.
Sorry for your medical problems... Yes, life is tuff sometimes and we got to take care of ourselves !
Have a nice evening

In life we also go through difficult times.
Thank you very much, have a peaceful and pleasant evening!

 

[Voyager10]

I have drawn the audio circuit diagram for you.

That's a genuinely beautiful hand-drawn schematic. You could sell these as art

Take care, and get well soon.

 

[MidnightArrakis]

I must "trace" wich wire is wich...

"wich".....is actually -- which --.....just so you know.

/

 

[Emmathom]

Hi
I've rebuild the audio circuit on a new board > a "bread-board" (I love bb) with the same values.
I cut the high-pass board (easier way to do) and conneted it to the audio board with wires.
The mic is now functionnal again, but I lost 4dB regarding to the "original" one (...)
I measured the 2 transformer (not connected) and I found :
- Original : 129Ω / 49Ω
- Monacor (E wiring) : 323Ω / 63Ω
A special thanks to @micolas for helping me +++ !

 

[micolas]

Hi
I've rebuild the audio circuit on a new board > a "bread-board" (I love bb) with the same values.
I cut the high-pass board (easier way to do) and conneted it to the audio board with wires.
The mic is now functionnal again, but I lost 4dB regarding to the "original" one (...)
I measured the 2 transformer (not connected) and I found :
- Original : 129Ω / 49Ω
- Monacor (E wiring) : 323Ω / 63Ω
A special thanks to @micolas for helping me +++ !

You put R3=R4=6.8k or
R3=R4=2.2kk ?

 

[Emmathom]

You put R3=R4=6.8k or
R3=R4=6.8k ?

2,2KΩ as original diagram...
and I replace 6,8nF by 10nF Wima FKP2 and 47nF CBB by 47nF (same value) Wima MKP

 

[micolas]

2,2KΩ as original diagram...
and I replace 6,8nF by 10nF Wima FKP2 and 47nF CBB by 47nF (same value) Wima MKP

How do the voltages compare to the stock one?
in dc/dc and audio circuits

 

[Emmathom]

Is it the way we wired the transformer that makes the mic loose 4dB ??? differences in K170 or SA1015 ?

 

[Emmathom]

How do the voltages compare to the stock one?

a bit higher : 1v more on both XLR / 3v more after 4,7KΩ / same for drain & source > I will make some measurement tomorrow and let you know the exact voltages...

 

[micolas]

Is it the way we wired the transformer that makes the mic loose 4dB ??? differences in K170 or SA1015 ?

possibly the stock microphone has a ratio of 1.8:1
in version E we have 2:1 and a higher ohmic resistance of the primary Rdc1, so yes, we can lose 4 dB

 

[micolas]

Is the polarization voltage of the capsule good?