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I went to replace a couple of 12au7 tubes in my preamp with some RCA Clear Tops that I've had sitting on the shelf for some years and found that the pins are heavily oxidized. They may work fine as they are, but I'd rather clean them up first.
Recommended method? I don't have any Deoxit or contact cleaner here.
I use Deoxit and then push the pins into a piece of Magic Eraser and move the tube up and down. I guess you could use alcohol instead of Deoxit.
"Trying is the first step towards failure."
one of these
"Writing about music is like dancing about architecture." ― Thelonious Sphere Monk
I just discovered the magic of $14 spent at Walmart. I purchased a 150 piece dremel accessories set which includes a brass wire attachment and a felt attachment. I did not use a dremel, rather my drill. Using the brass wire attachment, I carefully cleaned the pins to "better than new". Then, I finished the job with the felt attachment to give them a polish. I like this solution very much.
I find that Deoxit and a piece of flannel work great. Might not remove all dirt, but improves contact significantly. I use it on all old stock tubes.
LCR cleaner. I get a mason jar lid, turn it upside down, filled it with LCR up to a point that I am sure will not reach the tube envelop of the 12AX when it is standing upright, place the tube(s), after 5 minutes, take the tube out, use toothbrush to clean, then dry it off with a clean dry rag.
Might work for you!
I use 2-liter soda caps or similar instead of a jar lid. The reasons being it would use less cleaner and if the tube should happen to tip over it would not be soaking directly in the cleaning agent. As far as the cleaning agent many things that clean metals will work. CLR works as does fuel system dryer (alcohol) from the local auto supply stores.
What is an LCR cleaner?
Google doesn't know.
I don't see why it wouldn't work.
LCR Cleaner not CLR. Typo!
make that two mistakes.
Just curious, what are Cajun bass traps?
Cajun bass traps are crawfish sacks filled with champagne corks (in my case, although any cork would do). A crawfish sack is very similar to the mesh style bag lemons come in except the mesh is larger and more see through. They typically hold about 40#s of crawfish. I estimate they weigh about 25#s filled with corks and a sack holds roughly 750 corks when brim full. Over the years I have been able to complete six of them and am 550 corks into the seventh. I simply stack them floor to ceiling at the front wall/side wall intersection as a substitute for tube traps, Each sack stands some 2 feet high so once I complete my eighth sack I'll be pretty much done. To ensure quality and uniformity, only corks from bottles whose contents has graced my personal flute will be employed. Cajun bass trap making is a very expensive and time consuming process, needless to say:)
hmm, I'd like to try that but I fear the WAF would be so low as to finally push my wife over the edge and neuter me in my sleep :(
There must be something wrong with me for not having something wrong.
lemon juice and Magic Eraser
It sucks to get old. It really sucks to get old and bitter.
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