Full m/lab SD2000 schematics

[Banshee777]

Thanks Serci78 - how about one in a TO-92 package?

I was leaning towards this one - ZTX618

http://au.element14.com/diodes-inc/ztx618/transistor-npn-e-line/dp/9526528

[Orbit]

haaa haaa

[serci78]

FZT688B use ok

[Banshee777]

Indeed.

On a related topic can anyone assist with an equivalent replacement for the ZTX688B?

[detectormods]

I am surprised that we have not seen a release of modernised SD2000 detectors considering the GB patents have expired.

[Carl-NC]

What he shows isn't FBS, it probably is sd2100.

[Davor]

This is FBS Tx, and 2100 is a PI with some silly timing scheme not shown in this picture. Good news is that both patents for FBS and silly timing scheme of SD series are expired, so have fun copying.

[N@SKO]

I'm looking for sd2100 tx and sample pulse timing .Thanks in advance!

[ashkelon]

please can you explane me how ground balance circuit work

[Ronk]

hello friends
i want to learn first GB pulse is N10 and second pulse N9 ?

i dont understand your question

[Ronk]

Can you replace transistors vn2410l with bsn274,zvp4105 with bs250?

i have used bs250 for the p channel fet and it works ok note that the published circuit has the fet in backwards

[ashkelon]

hello friends
i want to learn first GB pulse is N10 and second pulse N9 ?

[Ronk]

Can you replace transistors vn2410l with bsn274,zvp4105 with bs250?

i would think you can use just about any n channel fet but it does need to have a fairly high voltage rating

[serci78]

Hi N@SKO Qed preamp try

[N@SKO]

Can you replace transistors vn2410l with bsn274,zvp4105 with bs250?