CNI OEM driver board settings

[mccarrot]

The shunt is a 0,33 ohm TO220 style resistor,

The green component is a coil / choke

[JimBo]

A very intuitive read

Has anybody else "tweaked" their 473 and got results anything like GooeyGus?

Jim

[GooeyGus]

You guys are telling me that this component is not a resistor???

[mccarrot]

My 100mw did 150mW when I received it.

After my Tec opamps died I had to re-adjust the laser and its a VERY VERY VERY VERY VERY x 100 time consuming job.

I'm now back at 140mW, but after 1 hour it dropped back to 120 so still some work to do.

To find the optimal setting from scratch reserve about 8 hours of tuning.

[mccarrot]

You guys are telling me that this component is not a resistor???

Yes this is not a resistor but a RF coil.

[GooeyGus]

Yes this is not a resistor but a RF coil.

I guess ya learn something new every day!! I thought it was just some sort of crazy green chinese resistor

Hey, what is the resistance accross your shunt?

edit: you already answered. Just saw that :P

hmm... mine is a 1ohm. so I would calculate current differently then, yes? Would it be mV x 100?

[JimBo]

You guys are telling me that this component is not a resistor???

If you check the screen print on the board you will see it has the prefix "L" which is for an inductor, resistors are prefixed "R".

Jim

[GooeyGus]

If you check the screen print on the board you will see it has the prefix "L" which is for an inductor, resistors are prefixed "R".

Jim

Yes sir! I knew about the labelling, I've really just never seen a coil in that package (but I dont work with much (any) RF stuff at all). It was labeled "LO" so I was hoping they gave it a weird label because it may have to do with current limiting. I just noticed mine was a bit different than the one in the photo. My driver will only go to a few hundred mA's, but I've decided that the limiting factor is probably the shunt itself as mine is 1ohm and the higher amperage drivers have a .33ohm

[dave]

hmm... mine is a 1ohm. so I would calculate current differently then, yes? Would it be mV x 100?

In your case, 1mv = 1ma - easy

[MechEng3]

My 100mw did 150mW when I received it.

After my Tec opamps died I had to re-adjust the laser and its a VERY VERY VERY VERY VERY x 100 time consuming job.

I'm now back at 140mW, but after 1 hour it dropped back to 120 so still some work to do.

To find the optimal setting from scratch reserve about 8 hours of tuning.

I am happy to see that someone else understands what I go through trying to get these things in good order. Most think a diode change in a DPSS is simple. I wish it was. I like a challenge so that is why I do it....it is not cost-wise to repair one....after calculating the time invested + the parts costs......yes a new laser is a LOT cheaper...plus you have a warranty