Tesoro Eldorado on the bench

[MaverickITA]

Hi Maurizio!

I suggest you to remove al opamp and check the voltage present in any socket.
In every pin 4 you must have a negative voltage of about 6,4V and in every pin 8 a positive voltage of 8V.
This is true for all opamp with the exception relative to LM308. In this case you must check pin 7 instead of pin 8.

Can be the transistor warm up for a short circuit.
Please, check capacitor and diode polarity.

Best regards,
MaverickITA

[paku]

hi can i replace the Transistor BC337 with BC547

[6666]

could you tell me which is the orientation of the 3 transistors - BC327
and BC337?

try this, pictorial view
http://hamradio.lakki.iki.fi/new/Dat...istor_pinouts/



and you can get all the data sheets from here
http://www.datasheets360.com/

[paku]

in this picture what is the value for the transistor

[MaverickITA]

hi can i replace the Transistor BC337 with BC547

Yes

[paku]

Yes

ok thanks

[paku]

what is replacement for BF245 ?

[paku]

where can i find plastic box like ivconic
http://www.geotech1.com/forums/attac...5&d=1234437440

[paku]

Tested Video Working Tesoro Eldorado By Ivconic
Thanks To Ivconic

[ivconic]

Well... i see whole gang of "Black Panthers" standing in a completely dark tunnel, doing nothing... except that the smallest guy is producing occasional high pitched farts !
I suppose the rest of guys are not quite happy! Though it's hard to tell due absolute dark...
...
Now seriously; i can't see a thing!? Am i gone blind or you forgot to remove shutter cover?!

[ivconic]

Wait!! I can see! I can see now! Miracle happened!
...
After numerous clicks on "Reload" button in my browser all of the sudden picture appeared!?
I don't know what was the problem; but i am sure it's about this new forum script! ( ooooooooahahahahahahahahahah!)
It's Carl again! I knew it!
...
Ok, now back to business...

I see now, WELL DONE! It is working just as expected!

Now all you have to do is to carefully apply some epoxy filler.

Be patient and try not to spoil the coil balance!


P.S.

Excuse me for joking!

[paku]

my world still on dark site im sorry ivconic becos u cant see that hahaha

[paku]

yea this one the true is working ivconic
im using coil by TGSL i have make many TGSL coil and i have tested all coil its work very very nice and reject all iron metal ferite almunium eldorado just detect gud quality metal
i just make change 3 transistor

[ivconic]

my world still on dark site im sorry ivconic becos u cant see that hahaha

No, seriously, first few attempts to watch the video failed and i got completely dark screen.
Don't know why is that!?
Than after several "Reload"'s all of the sudden video appeared and i can see it now.
Those things are happening, somehow browser chocks.
Your Eldorado is just alright.
Use some epoxy and fill the coil and let it dry. Observe not to spoil present coil balance, because it seems you made it right.
Box is alright. I don't like those bulky wires you put inside. You can try to shorten them as much as it will allow you.
Otherwise... what else to say? It is good. You made it!
Congratulations!
Next should be: you take it and go outdoor searching for nice finds!
Cheers!

[paku]

yea bro i made it thanks for the pcb
i will take it out and test after i make the better coil
you web browser must clean use the ccleaner for cleanup you PC bro