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looking for used dead 6.5 PMD's

dbrannon79

I'm getting there!
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Seguin, TX
Hey Guys, I'm looking around for a couple used and or dead PMD's from a 6.5 gm diesel. I've been wanting to try my hand at dissecting and repairing. if anyone has one that they are wanting to toss, I'd be happy to take it. I've been very interested in doing this and the local junk yards in my area doesn't have much at all for diesels.
 

dbrannon79

I'm getting there!
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@MrMarty51 message me! We can arrange shipping n all. Id like to setup a little project in the future trying to resurrect one and maybe remote mounting the transistors. Possibly finding some components that don’t need as much cooling to operate. A few years ago I replaced some mosfets in a power supply that were overkill for the application which worked perfectly and eliminated 80% of the heat it used to make. I know there’s other places that people have posted about trying to invent the perfect PMD but to me it’s a challenge and a hobby lol
 

jrsavoie

Recruit
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@MrMarty51 message me! We can arrange shipping n all. Id like to setup a little project in the future trying to resurrect one and maybe remote mounting the transistors. Possibly finding some components that don’t need as much cooling to operate. A few years ago I replaced some mosfets in a power supply that were overkill for the application which worked perfectly and eliminated 80% of the heat it used to make. I know there’s other places that people have posted about trying to invent the perfect PMD but to me it’s a challenge and a hobby lol
I've always said, since they are remote mounted, there is no reason to worry about size or bolt pattern. I never understood why somebody didn't come out with a bigger heavier duty unit.
 

dbrannon79

I'm getting there!
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I did finally find my old stanadyne oe PMD hidden under my back seat. It works but intermittently kills the engine. With a couple PMD’s to work with, I’ll try to source a large aluminum heat sink or plate and a spare long PMD cable to start with. Then start a thread with photos as I dissect them and research the components and their load capacity limits. We can all work together finding heavier duty parts

maybe others out there might have access to a schematic for the PMD itself!
 

Husker6.5

135' diagonal 16:9HD, 25KW sound!
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I used the aluminum heat sink, cut in half perpendicular to the cooling fins, from a fried 2HP 3Phase motor speed controller unit. A half is more than enough plate thickness, fin density and radiating surface area compared to the several styles of FSD coolers sold commercially by various vendors to handle the heat output of the two driver transistors of the PMD.

Sounds like you're trying to reinvent the wheel there, @dbrannon79 . Flight Services did pretty much what you propose to do with their upgraded PMD/FSD design (the licensed "new style" stepped unit they, Dorman and others also use and Stanadyne "borrowed" with a modified plug design) that basically used higher quality Mil-Spec driver components inside the circuitry that could literally take the heat and vibration of the stock PMD/FSD location. Remote located on a heat sink they are virtually indestructible.
 
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