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

Previous 20 Messages   Next 20 Messages  
rockable
Contributing Member
***

USA/ NC/ Greensboro

A passion for making noise....
Sep 14th, 2007 07:55 PM   Edit   Profile   Print Topic   Search Topic

Can't overemphasize the shutdown method. If you get used to working on PRs and Champs, you don't have to do it. Then, one day you're working on a DR, VR, etc and you forget to switch the power off and let it discharge itself and POW! All of a sudden, you're reminded again. It pisses me off every time I forget it, because I know better but I still do it every now and then.

Whiskey Rock-A-Roller

Thats what I am...

Women, whiskey, and miles of travelin'
Oct 21st, 2007 10:06 AM   Edit   Profile   Print Topic   Search Topic

So what's the verdict then?

Don't use de-oxit or contact cleaner?

I'm gonna try some alcohol and a tooth pick on my amp today. The hissing and crackling is drivin me up the wall...

We'll see what happens...

rockable
Contributing Member
***

USA/ NC/ Greensboro

A passion for making noise....
Oct 21st, 2007 10:10 AM   Edit   Profile   Print Topic   Search Topic

IMO, the deoxit and contact cleaner does a better job of getting oxidation off but it does leave a residue that will attract dust. I use Deoxit, others use alcohol. Try the alcohol and retension your octal sockets. Then you dedice. YMMV.

Whiskey Rock-A-Roller

Thats what I am...

Women, whiskey, and miles of travelin'
Oct 21st, 2007 10:15 AM   Edit   Profile   Print Topic   Search Topic

Yeah, I figured I'd try alcohol first. The amp's not THAT old, so I don't expect any serious oxidation.

If that don't work, I'll go get some De-oxit.

Dust shouldn't be a big issue should it? Once the tubes are back in, how would dust float up in there?!?

imjb1911
Contributing Member

Chicago

BFPR fan club member
Oct 21st, 2007 10:23 AM   Edit   Profile   Print Topic   Search Topic

I usually clip a jumper from ground to pin 1 of V1. This works well to dissipate any residual charge.

Quote from rockable:

"Can't overemphasize the shutdown method. If you get used to working on PRs and Champs, you don't have to do it. Then, one day you're working on a DR, VR, etc and you forget to switch the power off and let it discharge itself and POW! All of a sudden, you're reminded again. It pisses me off every time I forget it, because I know better but I still do it every now and then."

I had a few Champs Vibro Champs and PRs when one day I got my first DR. It was an all original '67. I couldn't wait to tune it up. I had the chassis upside down on a couple of 2x4s and laid my forearm on the bottom of the chassis as I stuck my dental probe into one of the sockets. After I got back up, I checked and found 280v on that pin. Good thing it wasn't 450v is all I could think of. Be safe.


Whiskey Rock-A-Roller

Thats what I am...

Women, whiskey, and miles of travelin'
Oct 21st, 2007 12:07 PM   Edit   Profile   Print Topic   Search Topic

"After I got back up, I checked and found 280v on that pin. Good thing it wasn't 450v is all I could think of. Be safe."


Checked mine before starting...

Did the ol' unplugged, standby on...

Made a cup of joe, and checked to find 0v at all pins...

Nice... It it only RI amps that discharge themselves?


Got her all done though,


And hey..... WAIT!!!

What's that sound coming from my amp!?!?!?!?!?



Why I think its:



NOTHING!!!!

Wow, I've never been so happy to hear nothing coming out of my amp.

Been puttin this off for the longest time, but now she's nearly dead quiet. Didn't have any alcohol around (thought I did) But just a tooth pick alone got a lot of crud out. May do it once more with alcohol or de oxit in a few months to get the remainder out. power tube sockets were QUITE oxidized.

Not a lot of retensioning to do. Only a couple sloppy ones.

Much better now!

With doing this, replacing pre amp tubes with Tung sol's and a Mullard PI, bright cap clip, and a Weber beam blocker, this is a whole different beast...

I think the only other thing in the works is some better Power tubes, and maybe a Weber 12F150 one day...

But for now, she sounds GREAT!

rockable
Contributing Member
****

USA/ NC/ Greensboro

A passion for making noise....
May 6th, 2008 07:37 PM   Edit   Profile   Print Topic   Search Topic

Bump


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!

Previous 20 Messages   Next 20 Messages  

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




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