Full m/lab SD2000 schematics

[Andrei]

Hi! may be e-bay, https://eu.mouser.com/c/?q=tlc7m7, https://www.chipdip.ru/search?searchtext=tlc27m7 ?

[Dayzil]

pcb arrived

pcb geldi iyi iş?ilik par?alar i?in bana şans dileyin andrei

[Qiaozhi]

pcb geldi iyi iş?ilik par?alar i?in bana şans dileyin andrei

Please read the forum rules -> Basic Rules of the Forums
and make your posts in English.

[detectormods]

Do not use old parts, use TLE 2022 in place of TLE27m7 as is has faster settling time , greater bandwidth, less noise and lower power. And is much better, i have used this as a single supply buffer amplifier on the SD2000 .

[Andrei]

May be TLC27M7?

[Andrei]

if you install tle2022, will you probably need to change the amplifier harness?

[detectormods]

TLE2022 may not be compatible, it is what is used in the GPX4500/5000 detectors, my bad. I had a re-chipped SD2000 but I sold it and now cannot locate my files.. I made some small sub boards with different chips, but like 8 years ago.

[aft_72005]

pcb geldi iyi iş?ilik par?alar i?in bana şans dileyin andrei

where is PCB file ?
plase upload PCB file.

[Orbit]

What would happen if you did not connect that is to 8 pin cd40106 with 100R ?I know it locks Tx, does it affect anything else? Is it possible to take the sample later or earlier after closing the tx signal?

[detectormods]

What would happen if you did not connect that is to 8 pin cd40106 with 100R ?I know it locks Tx, does it affect anything else? Is it possible to take the sample later or earlier after closing the tx signal?

It allows the detector to use 1Mhz or lower frequency timebase, beware stretching out the TX below 900Khz as the mosfets will nearly start glowing in the dark.

[Orbit]

It allows the detector to use 1Mhz or lower frequency timebase, beware stretching out the TX below 900Khz as the mosfets will nearly start glowing in the dark.

Thanks Peter, that means no smaller crystal than 1mhz ..

[detectormods]

Thanks Peter, that means no smaller crystal than 1mhz ..

You can go lower in frequency but the output Mosfets will need to be upgrades to lower on resistance types.

[Jose]

I read in the forum that the GP3000 series uses an LC oscillator controlled by a varicap diode to vary the frequency, I wonder if it would be possible to adapt it to the SD2000.
Here in my country it is difficult to get crystals of different frequencies to experiment.

[detectormods]

I read in the forum that the GP3000 series uses an LC oscillator controlled by a varicap diode to vary the frequency, I wonder if it would be possible to adapt it to the SD2000.
Here in my country it is difficult to get crystals of different frequencies to experiment.

Stick one of these into it,
https://www.ebay.com.au/itm/29498808...Cclp%3A2047675

[Jose]

Thanks Detectormods.