Cleaning severely corroded tube pins - isopropyl and steel wool

[egellings]

Its where they suck the air out. Most small tubes have it on top, this one happens to have it on the bottom. Octals usually have it on the bottom, but its hidden by the plastic key.

The socket for that must be a special one with a hole in its center that accommodates the rather large exhaust nipple.

 

[gadget73]

I looked up the tube type, its a 12 pin duodecar "compactron" type. Those usually have a pretty large center opening.

 

[rustycat]

Is it possible to reapply nickel plating to the pins via electrolysis or would immersing the tube in water ruin it?

 

[arts]

Anyone know what tube pins are actually made of? Its a silvery looking metal but I've seen green fuzz. Always kind of assumed it was tinned hard brass but I've never really studied it.

Kovar

Kovar - Wikipedia

en.wikipedia.org

 

[gadget73]

Kovar

Kovar - Wikipedia

en.wikipedia.org

Interesting, that looks like the sensible material given the matching expansion coefficients. That would also make sense why i've never noticed a base layer of material on a well used 9 pin. I've seen that on octals, those are just plated brass. Hit one with a file and it goes from silver to yellow.

 

[arts]

The wire coming through the glass to the pins of an Octal base are Kovar. I have found plated steel pins on Octals too. Talk about trying to save a buck..

 

[Mr Boochie]

Well that`s sad news about the locally availability of Tarn-X, Art.
I luckily have several 15 yr. older containers of Tarn-X, probably enough to last me for the rest of my animated time on this third stone from Sol.

It's now called ex-Tarn-X.

 

[gadget73]

Ex terminate?

 

[Bill Ferris]

It's now called ex-Tarn-X.

Wouldn`t surprise me that the EPA pressured the Tarn-X Co. to water it down, if not the case then the Tarn-X Co. might have done so on its own for economic reasons.
Kind of like what happened to Ospho rust treatment, that over the counter availability is not as strong/effective as is available to commercial interests, as told to me by my decades long friend who found out from his direct business connections with the marine industry several decades back.