No smoke.
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Dead, just the same.....
RL
- posted
15 years ago
no magic smoke from this one
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- Vote on answer
- posted
15 years ago
Looks like Jurassic Park. Where are the tiny dinosaurs?
John
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- posted
15 years ago
It's the blob from outer space that's gobbling up all the electronics on earth!
Other observations:
Why all the holes in the pcb?
Looks like there's a heavy conformal coating.
CD10? Is that a cap? If so, neato that the body is soldered down. I haven't seen that before.
Huh...Some visible flux.
D from BC British Columbia Canada
- Vote on answer
- posted
15 years ago
RF power amp; lots of ground vias.
High current RF stuff.
John
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- posted
15 years ago
Yup. With Zin a fraction of an ohm and Zo a couple of ohms, milliohms in the ground return is wasted power, not to mention the goofy stuff that goes on trying to LC match an illusion.
Yup, but I'd have expected to see American Technical Ceramics (ATC) capacitors here. I didn't know Cornell-Dublier (sp?) was even around any more. You can see a 12 puff on one side and a 10 puff on the other side. From the width of the trace exiting the photo on the left, I'd say you were looking at the collector lead.
Strange device. I can't see any numbers past MRF9060, so if that is what this device is, it was meant for service up around a Gig, but the data sheet seems to indicate it was intended for SSB use as the two-tone intermod and PEP power are the parameters on the sheet. I'm not aware of any commercial SSB service up in that neck of the woods.
Jim
- Vote on answer
- posted
15 years ago
Was the ancestor of the modern pig Jurassic pork?
-- Dirk http://www.transcendence.me.uk/ - Transcendence UK Remote Viewing classes in London
- Vote on answer
- posted
15 years ago
Nice photo.
Who's FET power amplifier chip is that? It kinda looks like they used some kind of silicon(?) goo inside the chip to help protect the die and wire bonds. When the FET blew, the silicon goo expanded, blew the seal, and ooozed out. If you break the lid off the FET, you'll see more of the same inside.
-- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558
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- posted
15 years ago
Is pork Kosher when its a verb?
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- posted
15 years ago
The GaN power fets are wonderful, with input and output capacitances in the pF range and nearly zero Miller capacitance. Really easy to match, or better yet to run flat wideband, not matched at all.
John
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- posted
15 years ago
They show up a lot in military electronics, still (with prices to match!); I doubt they're in many consumer gadgets any more.
You can see a 12 puff on one side and a 10 puff on the other side.