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FDP Forum / Amp Mods, Repairs, and Projects / The Official Tube Socket Clean and Retension Thread

Previous 20 Messages  
rockable
Contributing Member
****

USA/ NC/ Greensboro

A passion for making noise....
Dec 15th, 2008 03:54 PM   Edit   Profile   Print Topic   Search Topic

time for another bump.

willie
Contributing Member

Lawrenceville, GA

"Sound Service Since Sixty-Two"
Dec 16th, 2008 07:11 AM   Edit   Profile   Print Topic   Search Topic

Excellent info here though we have long ago learned to refrain from using any chemical that contains any sort of lubricant when cleaning tube sockets. That said, some are better or worse than others. The last thing you want to do is use a contact cleaner that has a mineral oil lubricant in it. Radio Shack has long used this in their products. Caig pro gold is a great lube but not what I would use on tube sockets, this also goes for Deoxit5 which we use tons of for most everything except tube sockets. Yes, there are times when we will use a little Deoxit5 followed by a cleaning and degreasing with a good commercial grade anhydrous isopropyl alcohol. We use a small spray bottle filled with it.

Sometime back, I noticed some problems with some amps where we had used Deoxit5 on the tube sockets. Often an arcing problem, or some odd noise or static problems would arise shortly after we had serviced the tube sockets. Upon close examination we would often find small carbon deposits had developed due to mico arcing where the pins had been insulated from the socket tangs due to traces of lubricant in the solvent. Since changing to pure alcohol we have had no such occurences.

willie
musicmenders.com

Blues_N_Rock

USA

Dec 16th, 2008 07:39 AM   Edit   Profile   Print Topic   Search Topic

Willie - "good commercial grade anhydrous isopropyl alcohol." Would this include the typical rubbing alcohol you see in the local drug store? If not, where would one buy such product for personal use (non-commercial quantities)?

Thanks

RivEraEra
Contributing Member

usa/east bay sf

Ain't no time to hate
Dec 16th, 2008 10:05 AM   Edit   Profile   Print Topic   Search Topic

Drug store IPA (no, not India Pale Ale) usually comes in 70% or 90%, so a fair amount of water. A lab supply place would have anhydrous. FYI (from my day job in the pharma industry), 70% IPA is the most bacteriostatic grade.

Billm
Contributing Member
*****

New Jersey, USA

Hey! What exit?
Dec 16th, 2008 11:20 AM   Edit   Profile   Print Topic   Search Topic

Drugstore rubbing alcohol also often contains a small amount of mineral oil to reduce skin drying and excess friction.

The anhydrous stuff doesn't stay anhydrous for very long. It drinks up water vapor from the air like crazy. So if you can verify that the isopropyl alcohol in the drugstore doesn't have any mineral oil, it should be fine.

Fritz_D_Cat
Contributing Member
*****

was the coolest cat

in any toon genre
Dec 16th, 2008 12:27 PM   Edit   Profile   Print Topic   Search Topic

Ethanol of commerce is 190 proof (95%) with usually a little ketone mixed in to keep the wino's from having a field day. It's cheap, as well. I think you can get a can at your local ACE Hardware.

Stay away from lacquer thinner, though. It's tempting, and will surely carry water and lube away, but can do some serious damage to some of the non-ceramic tube sockets or even nearby components (including plastic wire insulation on newer amps).

willie
Contributing Member

Lawrenceville, GA

"Sound Service Since Sixty-Two"
Dec 16th, 2008 09:07 PM   Edit   Profile   Print Topic   Search Topic

I believe this is the product we use and we get it from MCM Electronics. Does a great job. It doesnt last us long cause we use quite a lot of it, but don't like to buy it larger containers for the reasons mentioned above.

willie
musicmenders.com

Anhydrous Isopropyl Alcohol

Blues_N_Rock

USA

Dec 17th, 2008 11:05 PM   Edit   Profile   Print Topic   Search Topic

Would anyone know whether methanol alcohol is the same as the anhydrous isopropyl alcohol? I have a friend that works in a labortory testing for vocs (volatile organic compounds). She uses a lot of methanol alcohol and she says it is anhydrous form. Unfortunately she did not pass on the brand name so I couldn't look it up. She mentioned long ago they used ethanol form but switched to all methanol form. Thanks

willie
Contributing Member

Lawrenceville, GA

"Sound Service Since Sixty-Two"
Dec 18th, 2008 06:18 PM   Edit   Profile   Print Topic   Search Topic

Hmmm...I don't believe Methanol (wood alcohol) has the same solvent properties as Isopropyl alcohol. Anhydrous simply indicates it contains no water. Im no chemist however.

willie
musicmenders.com

Blues_N_Rock

USA

Dec 19th, 2008 05:41 PM   Edit   Profile   Print Topic   Search Topic

Thanks Willie. I guess it is best to just buy the right stuff and we done with it.

willie
Contributing Member

Lawrenceville, GA

"Sound Service Since Sixty-Two"
Dec 19th, 2008 06:29 PM   Edit   Profile   Print Topic   Search Topic

Yep..and it's not expensive either.

willie
musicmenders.com

Billm
Contributing Member
*****

New Jersey, USA

Hey! What exit?
Jan 20th, 2009 06:22 AM   Edit   Profile   Print Topic   Search Topic

Getting back to the fundamental issue of retightening loose springs, I put up a couple of pictures of the procedure on my new site. For the neophyte who wonders how big a screwdriver, where do I stick it, etc., it may help.

Retensioning tube sockets -- pictures

tonyinbermuda
Contributing Member
***

Bermuda

It's got to get better in a little while
Dec 13th, 2010 11:54 AM   Edit   Profile   Print Topic   Search Topic

Just found this old thread and it's useful info....time for a bump!

vanceen

USA

...you will never hear surf music again
Jan 5th, 2013 05:20 PM   Edit   Profile   Print Topic   Search Topic

Just for info, methyl alcohol (also called methanol) is a different substance from isopropyl alcohol (or isopropanol, used in rubbing alcohol).

Methanol will remove dirt and grease. However, it evaporates much more quickly and is much more toxic.

You can get anhydrous isopropyl alcohol on line. If you keep the bottle closed it won't pick up water, or only very slowly.

Tesla

Norway

Dec 22nd, 2013 02:56 AM   Edit   Profile   Print Topic   Search Topic

It worked great for me! 3-rd tube on Blues Junior used to be very loose, making hum noises +++. I was on Google looking after new 9 pin socket and come collaterally at this forum, ALL MY PROBLEMS SOLVED! Thanx a lott!

jhawkr
Contributing Member
**********
**********
**

Wichita, KS USA

It's all gravy from here on...
Oct 22nd, 2014 06:12 AM   Edit   Profile   Print Topic   Search Topic

How about using a non-lubricating contact cleaner like CRC?

amp mad scientist

USA

Dec 4th, 2015 05:00 AM   Edit   Profile   Print Topic   Search Topic

Radio shack cleaner is mineral oil- avoid.

Use Deoxit D-100 or G-100. (G-100 is superior)

But, it's always way better just to put new sockets in.
Cleaning is temporary, usually.
If the socket is oxidized / burned, replace it.

Don't pretend that spray cleaner is going to fix a wasted socket.

amp mad scientist

USA

Dec 4th, 2015 05:02 AM   Edit   Profile   Print Topic   Search Topic

CRC is not as good as Deoxit...

NHILL1

United States

Nov 30th, 2016 05:04 PM   Edit   Profile   Print Topic   Search Topic

In case anyone is wondering, in the original post he said "The power tube sockets will likely be too big for that. Improvise."

You can split a cue tip in half, and use the part that doesn't have the cotton to clean the inside of the power tubes. In my 65 DRRI, it was a perfect fit.

Also, I tried doing this without removing the chasis and royally f*cked up my amp. I had to take out the chasis and carefully go through each socket one by one, and after doing this my amp went back to normal, plus the sockets were cleaned.

Previous 20 Messages  

FDP Forum / Amp Mods, Repairs, and Projects / The Official Tube Socket Clean and Retension Thread




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