Be careful if you have to clean the board with those pots... we had horrendous problems until we figured out the issue...
Be careful if you have to clean the board with those pots... we had horrendous problems until we figured out the issue...
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We haven't had problems with these Bourns pots, with aqueous or solvent cleaning. Some companies absolutely forbid trimpots. Sometimes they are just what you need.
We did have horrible cleaning problems with some relays.
-- John Larkin Highland Technology, Inc Science teaches us to doubt. Claude Bernard
We had a high failure rate wit BEC (Beckman) pots. I removed them from o ur AVL, and told purchasing to only buy Bourns. BEC threw a oyal hissy fit, and claimed zero defects. About six months later they blamed it on their O
-ring supplier for shipping out of spec seals.
Paulo has a laser at home and he just did this:
I think we'll get one for work too.
I *think* it's a GHz o/e. I need to cobble up a really fast light source to test it. I'm pulsing a fiber-coupled laser diode from one of our DDGs and poking that into the o/e and I'm seeing a 500 ps electrical output, but I don't know how fast the optical input is.
-- John Larkin Highland Technology, Inc Science teaches us to doubt. Claude Bernard
If it's out past 800 nm, you should be able to see it with an SD-48.
Cheers
Phil Hobbs
That first unit is 850. We do have some New Focus superfast detectors at that wavelength.
I'm thinking, for the longwave version, I can use a 10 Gbps SFP module as a source. I'll need to get some LC-to-ST fiber cables.
-- John Larkin Highland Technology, Inc Science teaches us to doubt. Claude Bernard
SFPs are awesome--we use them for TIA tweaking.
Cheers
Phil Hobbs
At the last minute, I hung an SFP section on my latest multi-prototype board.
I could slice a couple off for you if they'd be helpful.
They are telecom parts; I suspect that the laser doesn't ever go to extinction. Gotta test that. The ac coupling time constants are all over the place.
-- John Larkin Highland Technology, Inc Science teaches us to doubt. Claude Bernard
Sure, thanks. I have one of my trademark stomp boxes with pluggable short and long wave 1.25 Gb/s modules. BTW on those ones you can hack the coupling caps. A faster one would be very useful.
Cheers
Phil Hobbs
-- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net http://hobbs-eo.com
Use a forming tap, versus a cutting tap. Forming taps are very strong, rarely break, and work very well in aluminum. Use a tapping lubricant intended for the purpose.
.Joe Gwinn
Do you want a couple of these?
I hope I got that right!
-- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
Sure thing!
Cheers
Phil Hobbs
-- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net http://hobbs-eo.com
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