SBG-PID

[6666]

where are you?
i was able to buy it in Melbourne ~$7AU
I will not know if it's ok until I build the detector

I think he is in Europe, where did you get the chip ?

[nickel_n]

Yes.
Here you do not get so easy electronic waste and 5 euros for a LF357 I just do not want to pay
Or I do not build this circuit and give away my board

where are you?
i was able to buy it in Melbourne ~$7AU
I will not know if it's ok until I build the detector

[Andi68]

Yes.
Here you do not get so easy electronic waste and 5 euros for a LF357 I just do not want to pay
Or I do not build this circuit and give away my board

[ivconic]

Patience, it takes a while to get all the pieces together.
I ordered the LF357 in China.

[Andi68]

Patience, it takes a while to get all the pieces together.
I ordered the LF357 in China.

[nickel_n]

anyone finish it?
any reports yet?

[eclipse]

AD711/AD712 are improved TL0x1/TL0x2 and they perform nice in all circuits tested and these are expensive too so that's a nice trash bin dig.
Who says gold can be found only on the field??
BTW found a 100$ Roman coin the other day just walking in the forest, near the road.

[ivconic]

Damn, the LF357 is very expensive, it should give a cheaper replacement type.

The other day i went to local scrapyard. Scrapyards are sometimes like flea markets for me, only cheaper, lot of fun and dirt! And costs nothing!
And sometimes i get lucky.
That day i was very lucky!
I discovered some special medical equipment, large metal box.
Inside large pcb, all shiny! (gold)
So i chop it out, put in a car and drive back home.
What i discovered on it?!!!!!
- 19 x AD712 in special package, gray strip over the chip (probably meaning something).
- 11 x AD711 ....
- 9 x OP37 ......
- 1 x Xsis2712-B Dc-Dc 24V In/200V Out
a lot more material which i can't recall right now.
REAL FORTUNE!
Top quality! No fakes!
Price = 0.00
...
So... OP37 is kinda interesting enough to replace LF357.
(what's good for Garrett - probably is good for us too)

[6666]

My boards have arrived and are very nice, ran into a problem with parts cannot get a BC516 unless I buy 400,
the closest PNP darlington I can get only has a HFE of 750 which is very low and probably not suitable

I found some MPSA64 in my junk box will try those

[Andi68]

Damn, the LF357 is very expensive, it should give a cheaper replacement type.

[Andi68]

But I'm just considering whether a BC516 is really necessary as a driver for the TIP31?
In my opinion there is a BC327-40

[Andi68]

https://www.ebay.com/sch/i.html?_from=R40&_nkw=BC516&_sacat=0&_dmd=1&rt=nc

[6666]

You can make yourself a Darlington from two transistors, no problem.

[scs]

You can make yourself a Darlington from two transistors, no problem.

[6666]

My boards have arrived and are very nice, ran into a problem with parts cannot get a BC516 unless I buy 400,
the closest PNP darlington I can get only has a HFE of 750 which is very low and probably not suitable