Another IC-EPROM Question

Originally Posted by spinroch

Save ceramic IC's: they are worth more

Whats the price difference on ceramic vs normal?

Also with the windows, I have a bunch with windows, but none show gold, at least I dont see gold. Should I have 3 buckets? normal, ceramic, and windows?

Tha

Originally Posted by Jax

Whats the price difference on ceramic vs normal?

Also with the windows, I have a bunch with windows, but none show gold, at least I dont see gold. Should I have 3 buckets? normal, ceramic, and windows?

Ceramic chips are normally older, back when Gold was worth less than it is now, so they used more Gold then.

Double check the windowed chips, theres 4 sorts, Gold or Silver wires, and Gold or Silver backgrounds
Have a close look at the actual chip, see what its sitting on, it looks like a silver paint or a goldy brown paint under/around the actual chip.
Its actually a metallic paint thats used as a heatsink for the chip.

I save the chips that I can can get and sort them into styles.
You can take the chips and roast them in a small drum untill the plastics turned to charcoal.
Then seive out the legs and chips from the powder, then use a gold pan to get the gold connection wires.
Theres still Gold bits stuck to the legs and sometimes Gold plated legs, that you don't get the Gold from. A proper Gold refinery will get this Gold.
Im expecting I will have to use a belt sander to sand off the visible legs. And a microwave door as a seive...

I have sorted the chips based on style, flat packs, plug ins, solder thru's, J leg eproms, so I can get a proper return rate for when I do it.
Im going to use a gas bottle as a container (all care taken!) And partly full scrapped gas bottles to fuel the gas burner. Maybe return the excess roasting gas back into the burner too (since I just thought of it..)

Windowed eproms will get sold though.

In the OP's photos, the bottom row, the chip with a sheet of metal sticking out the top. Thats probably a power chip or something.
The heatsink is normally Copper or Ali, mostly Tinned Copper, they have a value because of the Copper.
Snip the edge of one to see whats inside it.
The chunky 3 legged transisters are the same, Copper bearing transisters. Remove any solder or board, roast to remove plastic, seive to get Copper.

These are what I get my "Copper value quote" from. "If you have a peice of Copper the size of a one cent coin. Its worth..
one cent"