Full m/lab SD2000 schematics

[serci78]

Hi N @ SKO try bug.code but : tx open if : IRF710 off: IRF710 open if : close tx: maybe

[N@SKO]

Hello there! found in the Russian forum md4u.ru idea how to replace multiple ICs with processor attiny2313. Thus can be made smaller boards. I made a model of the scheme but it turned out that the times are not accurate. Someone who has more experience in programming you will be able to write a new correct hex?

[nejdet]

Very nice. Lay format file ?

[serci78]

I took g.s project example (DIP packages)20x15cm I run to connect the micro control..... the later micro control connect

[serci78]

thank you Finderskeepers

[Finderskeepers]

Use 1n4148 diodes where not noted on the schematic. 1n5819 schottky diodes or mbr420 diodes will do. I had a few sbyv27-200 diodes on hand and they work very well.

[serci78]

hi mechanic equivalent for diode BAS16 and 1OMQ100 (DIP packages) please. regards

[Finderskeepers]

Its best that you use parts shown in the schematic. I've experimented with upgrading parts which degraded its performance or made it noisy. I can only recommend that you use a ssm2210 in lieu of the lm394 chip in the front end receive. Stick with the original, this is the ultimate diy pi machine with ground balance. Add a variable gain to each search channel and Mario's dds unit will give a substantial increase in performance.

[porkluvr]

NE5517 looks almost like a direct replacement for LM13600 and is certainly worth a try. LM13700 has only slightly different internal circuit (but same pinout) so you could give it a try also.

It looks like either of the other two should probably successfully fill in for the LM13600.

[kt315]

misleaded. LM13600 is dual while I gave single one both. you need NE5517, you are right. also some tipe I see in fisher schematic... do not see sure marking...
something FRL510286 -???

[Qiaozhi]

我有一个SD2000，但我发现效果不理想，5克黄金都很难检测，结果是小于GTI2500，不知道是什么 原因，请指点

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

[fengzhai01]

我有一个SD2000，但我发现效果不理想，5克黄金都很难检测，结果是小于GTI2500，不知道是什么 原因，请指点

[strujas]

Thank you guys

[kt315]

try learn CA3080 and LM13700.

[Finderskeepers]

Its all on Zeds schematic. Forget using other schematics, they're laced with errors. Not sure for a good replacement of lm13600.