Garrett (pulse) XL 500

[reptooyep]

Best replace for LM709 is LM318.

Thanks, that was the first one i tryed.
Do you wire the compensation caps the same way athe 709 ?

[ripsdevala]

Just get 0.5 enamel wire, will solder it all tonight.
The pcb copper is very close to each other, should do manual way to seperate them, i hope this work.

[reptooyep]

Nice work !! You should test the continuity if you have doubt. You should also do the same after soldering to avoid shortcuts.

Fred, i took pictures of some points on the board. Can you have a look ? I've put a LM318 in place of the 709. the output looks nice.
On the output 9 of the 4066, i should have a 400Hz signal but i have nothing.
The outputs 1 and 4 of the 4066 are about 100mv peak but the input is few volts. Is it normal ?

Thanks

[blobber]

Well, I have opened my box, to take some measurements.
I have taken some screenshots.








The outputs of 4066 1 and 4 shows me 5Volt, also the outputs of LM324 1,7,8,14 always 5 Volt.
Unfortunately my battery was empty, as I want to recheck this. Tomorrow I will continue..

[reptooyep]

Well, I have opened my box, to take some measurements.
I have taken some screenshots.

[ATTACH]37088[/ATTACH]



[ATTACH]37089[/ATTACH]

[ATTACH]37090[/ATTACH]


The outputs of 4066 1 and 4 shows me 5Volt, also the outputs of LM324 1,7,8,14 always 5 Volt.
Unfortunately my battery was empty, as I want to recheck this. Tomorrow I will continue..

Have you seen my troubleshoot picture ?
The output of my 318 seems good, according to your screenshot

[blobber]

Yes I saw it and it's looking good.

[reptooyep]

Yes I saw it and it's looking good.

I would be interrested to see screenshots of the output of 4538 to compare.

[blobber]

Ok, I will do it tomorrow.

[reptooyep]

My light always on trouble was due to a 100K resistor missing... I put SMD resistor cause i cannot wait my order from china and i forgot one ...
Thanks a lot for the time you spend for me and others. It's the second time you help me, the first one was with the KROT2.
Tousand thanks

[blobber]

You're welcome.
The LED shines still always, nothing has changed?
How much current consumption has your board?

[reptooyep]

Now i can make the light off with 10k pot.
I have not calculated the power consuption but i tested few hours now with a single 9v battery and it's now 8.5v.
When it'll work good, i'll calculate this

[blobber]

Okay.

Calculation...? No, I mean to measure the current, DC in mA with multimeter.

[reptooyep]

i'll do it tomorow ...

[reptooyep]

My unit consuption is 56mA but i still have trouble with the functionning.

[ripsdevala]

What is best equivalent for mps A13? Can i use 2n2222? Forgot to buy it