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It is a TO3 package, and is marked Motorola 1052-5. That doesn't seem to track any of their usual numbers, though. When I get a chance, I will put one on a curve tracer, and see if I can recognize it.... assuming it is good, of course. -Chuck

Where to start? I work in this industry as an engineer. There are very exacting specifications, as you say, but this manufacturer didn't follow them. The broken solder joints I found were on the IC, where the holes were easily 50% too large, and the lead ends were not crimped over to make a...

Here is a picture of the potted unit, and what I used for the potting compound.. Plain old Permatex Flowable Windshield & Glass Sealer. Make sure that you read the label, though... The old version of this sealer was the type that made acetic acid while it cured, and the new is safe for...

I did some further checking around... MSDS's, etc... and the Permatex flowable silicone windshield sealant should be perfect for potting the board back up. Basically, you don't want to use any of the silicones that make acetic acid (vinegar) on curing. Those that shouldn't be used will list...

It is a lot harder to get the board out the rest of the way. Since I was 99% sure that I would find broken solder joints (differential expansion of the epoxy potting compound, and the copper wire on the component leads), I only exposed the bottoms of the boards. I have another bad blinker...

The sealant is there mostly to keep moisture out. Remember that the deuce can be submerged. -Chuck

A heat gun is fine, but remember the case that holds the potting is plastic too, and will melt if you let it get too hot.... 250F is about as hot as you should let it get. Apply a blast of heat, and then pick at the potting... more heat, and then more picking... -Chuck

I plan to use clear GE Silicone II caulking compound. I have found that it is non corrosive, and does a pretty good job if you are neat about it. If the new Loctite silicone windshield repair compound is non acid curing, it would work very well... it pours like liquid...I haven't tried it...

Hi, I just finished repairing a couple of M35A2 Flasher modules, and thought some might be interested. The problem is the circuit board is single sided, and the manufacturer drilled the holes too big. That means that if the component leads are not bent over onto the board, the potting...