Military hi-speed comparators

[AUH-R]

Hi all,

I cannot find any source of information for comparators on the forum. Has anyone ever processed these types of component before? How would the experienced refiners tackle an unknown? The silver metal coloured tops are magnetic.




Thanks for any pointers anyone may have.

Best wishes,

 

[macfixer01]

Hi all,

I cannot find any source of information for comparators on the forum. Has anyone ever processed these types of component before? How would the experienced refiners tackle an unknown? The silver metal coloured tops are magnetic.




Thanks for any pointers anyone may have.

Best wishes,

Without part numbers there is no way to find specific information. Generally though they probably wouldn't yield much more gold than any typical gold-plated TO-5 package transistor, the main difference being these are an integrated circuit so have twice as many leads. The cap is probably steel and most likely is not gold plated inside but could be. The surface of the metal platform inside that the chip is mounted on should definitely be gold plated though. If they truly are made to some military specification they may have thicker gold plating than commercially sold parts but who knows? Most often the Google results on this stuff is mainly surplus chip dealers selling them as new-old parts for crazy prices. These appear to be unused so you may do better to sell them as new-old parts than trying to recover the gold. Probably not worth the hassle on Ebay since someone would have to be looking for them there, but if you could sell them to one of those surplus chip dealers possibly?

macfixer

 

[goldsilverpro]

Like TO5's, the lid is most probably kovar, which is magnetic - 54Fe, 29Ni, 17Co

 

[AUH-R]

Thanks guys, I will add them to the next fibre cpu run I do.

Best wishes,

 

[solar_plasma]

What will happen to the germanium, indium and arsene in HCl/Chlorox in practice? I would like to know that, because I have some hands full of those comparators and TO-5's. Will arsene make problems? Can In and Ge get dropped from the solution?

 

[Geo]

those give some crazy yields. diagonal cutting pliers will pop the top right off but you have to practice at it a little.it may not remove the whole lid but any reduction in non-PM weight is a good thing.

 

[AUH-R]

those give some crazy yields. diagonal cutting pliers will pop the top right off but you have to practice at it a little.it may not remove the whole lid but any reduction in non-PM weight is a good thing.

Thanks for the heads up Geo I will give that ago, also I will do them separately from the fibres so we can get a possible yield on the forum.

Best wishes,

 

[solar_plasma]

Geo:

those give some crazy yields

Sounds good....what is a crazy yield in your eyes?

 

[ovidiuanghel]

I refine some transistors similar to this and i get around 3-4g of gold/kg

 

[solar_plasma]

When you have processed TO-3's, did you ever see it filled with a white powder in it? If yes, do you know what it is? I'm afraid of opening one more of those, but they are full goldplated inside, also the cab. There is a nice piece of germanium in it and a, I think, 1-2 mm indium bullet.

 

[macfixer01]

When you have processed TO-3's, did you ever see it filled with a white powder in it? If yes, do you know what it is? I'm afraid of opening one more of those, but they are full goldplated inside, also the cab. There is a nice piece of germanium in it and a, I think, 1-2 mm indium bullet.

I've seen that before, I believe it's for fireproofing. My guess would be most likely just baking soda? If you put a drop of vinegar or other acid on some and it fizzes up that would prove it's probably some sort of carbonate. In any case with fine powder that could float around, a dust mask is always a good idea.

Talk about weird, I've got some transistors sitting around filled with grease inside. Some have a white silicone grease like heatsink compound and some have a clear grease.

macfixer01