Full m/lab SD2000 schematics

[Andrei]

from datasheet

[Andrei]

Hello Zed! May be fit OP249?

[ZED]

Hello Anis

Yes they will work,although the AD712 is a little more noisier at 1hz,those chips have been around for some 30 years now and so there are better amps available,a jfet input that i like to use for the integrator is the OPA2140.

[Anis]

Hi genius, hope that all of you are all well,
I m back again for another question related to the recive CCT of the SD2000, I m using replacement IC's as below:
-TLC277 as replacement for the TLC27M7.
-AD712 as replacement for the LT1057.

Does that replacement do the work?

Rgds
Anis

[localbug]

I think you should try to replace your crystal oscillator.

[Andrei]

What were you hoping would happen with the changed 4066's?

I couldn’t get the correct signal at the output), but it turned out that it wasn’t 4066 but the amplifier is defective after 4066, I have this AD712, instead of LT1057

[Mechanic]

Hi!
These are two 4066 DIPs, before that here were 4066 SOICs, the result has not changed

What were you hoping would happen with the changed 4066's?

[Andrei]

Hi Andrei, I take a look again to your last vedio of the SD2000, I would like to know what Demodulator you are using it seems to be not the 4066.
[ATTACH]50416[/ATTACH]

Rgds
Anis

Hi!
These are two 4066 DIPs, before that here were 4066 SOICs, the result has not changed

[Anis]

It almost looks like that is 2 14-pin chips there. Not 1 28-pin chip.

Yes Walter, you're right, this confused me Lol

[waltr]

Hi Andrei, I take a look again to your last vedio of the SD2000, I would like to know what Demodulator you are using it seems to be not the 4066.
[ATTACH]50416[/ATTACH]

Rgds
Anis

It almost looks like that is 2 14-pin chips there. Not 1 28-pin chip.

[Anis]

Hi Andrei, I take a look again to your last vedio of the SD2000, I would like to know what Demodulator you are using it seems to be not the 4066.


Rgds
Anis

[ZED]

Hello Andrei

Yes you can mate,i have done it and it works fine.

[Andrei]

Hi! Is it possible to replace LM13600 with lm LM13700? LM13700 is in SOIC

[Andrei]

Andrei, great work man, I was thinking that I will beat you on building the sd2000, now I it's working well for you maybe I will need your support and help in future.
My congratulations!

Rgds
Anis

Hi Anis! Good luck! I think to buy a ready-made coil, and if everything works correctly, then reel your coil

[Mechanic]

Esr is the thing you want to look at for those ones.
The originals were 5600uf, but there are better ones(used in later detectors) that are 4700uf 10v nichicon. They are hard to buy though.

All in all it probably makes sweet FA difference.

Cheers Mick