Vacuum Tube base glue

[Tiny_Daddy]

Finally a description:
http://www.antiquewireless.org/otb/vt0108.htm
It's a shellac and resin compound.
Does this mean that loose tube bases can be fixed with alcohol? I'll have to check.

[FYL]

It's a shellac and resin compound.

Mostly marble flour (powdered marble):

" This recipe for RCA's basing cement, yielding about 200 pounds of material, was "standard for all bases." [9, 10]:

    Coarse marble flour      170 lb.
    Orange flake shellac      19-1/2 lb.
    Durite phenolic resin LR275-2      7-1/2 lb.
    Medium-color (grade G) rosin      3-1/4 lb.
    Denatured alcohol      9 liters
    Malachite Green aniline dye      10 g.
"

[stingray_65]

don't forget the 150 C degree curing temp.

[LooseChange]

Does this mean that loose tube bases can be fixed with alcohol? I'll have to check.

Did you try the alcohol?

[loogie]

Dude, alcohol isn't the answer to all problems.  Just some.  Maybe most. 

[Bub]

Hi Gent's

Being new to this and not knowing the answer, would thin cyanoacrylate work?. You can get very small capillary tubes at hobby stores to inject the ca into the base.

Thanks

Rob

[FYL]

Cyano works sometimes. You may use it on a cheap tube.

Emission Labs sells two versions of a dedicated tube base glue:
http://www.emissionlabs.com/datasheets/glue.htm

Available in Europe for €8.50 per bottle.

[PRR]

General-purpose Crazie-Gloo will fail at high temperatures.

Probably fine for battery-radio octals. Dubious on 6SN7. Will probably fail on 6V6/6L6 hot tubes.

[supro66]

J B Weld epoxy
500 Degrees F
I use this a lot

http://jbweld.net/products/jbweld.php