Average life of deflection transistors (V2000)

Scucci

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I replaced all of the deflection transistors on this heap about 2 years ago'sh, one of the 2N3716's fried (shorted to all pins) this morning. No power surges or anything on the mains (any time there's a power hiccup Dragon's Lair lets me know).

They should be lasting longer, right? Did I just get a bum replacement when I rebuilt the monitor?
 
Did you replace the bridge rectifier on the deflection board when you rebuilt the monitor? Good silicone based heat sink compound under those deflection transistors is a must, on both sides of the insulator.

You're right though, that part should last a lot longer than it did.
 
Did you replace the bridge rectifier on the deflection board when you rebuilt the monitor? Good silicone based heat sink compound under those deflection transistors is a must, on both sides of the insulator.

You're right though, that part should last a lot longer than it did.

I did Bob Robert's rebuild kit on them... atleast I'm pretty sure it was from Bob. I'm not sure if that included the bridge or not. I'll pull the chassis and check to see if I replaced the bridge (I can always recognize my soldering). The transistors didn't come with any mica, I do remember that. But I was able to reuse the old mica and I put arctic silver on both sides of the insulator.

If I didn't replace the bridge, is it going to be good enough to rebuild it with some diodes? I have some 1N5408's here that I use on standard monitors, and I think they're overkill enough to work in this case too... ?
 
just an FYI......I remember a thread somewhere (I think it was vectorlist) about artic silver being (minimally) conductive.

Edward
 
just an FYI......I remember a thread somewhere (I think it was vectorlist) about artic silver being (minimally) conductive.

Edward

Yup, I always use silicone based heat compound. IIRC Arctic Silver has aluminum mixed in it to dissipate heat for PC processors.
 
From what I've seen, deflection transistors last, on average, up to just before the person you're selling the game to shows up.

"But it worked ten minutes ago!"

-Ian
 
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