Dissasembling a Dagnall 100w OT

[mikeokc]

For the learned masses....

I need some direction on separating the laminations on a Dagnall so I can get down to the Primary winding on the bobin...I have a small short in the tranny's primary and I am NOT going to spend a fortune on a new one.


Mike

[playazincs]

You will need some locking pliers & a vice for the first few laminations (which will be sacrificed). Seperate them from each other with a thin knife, bend up the solid part of the E and pull it out with your locking pliers by tilting them against the rest of the stack. The first 3-4 will have to be done this way.

After this you can just sperate with the knife & they will slide out.

This is not exactly a job for the un-experienced, so proceed with caution.

[VelvetGeorge]

Try rapping on the core with a hammer to loosen the varnish. Then a putty knife works well for seperating. Usually....


Some need more hammering than others....

george

[novosibir]

For the learned masses....

I need some direction on separating the laminations on a Dagnall so I can get down to the Primary winding on the bobin...

But you should know, that after you've removed the laminations, you still have to unwind 120 turns of the secondary, before you'll get to the primary.

Larry

[mikeokc]

Larry wrote...

But you should know, that after you've removed the laminations, you still have to unwind 120 turns of the secondary, before you'll get to the primary.....

Well never let it be said I do anything easy...I've never done surgury on one before so this is my test. I can get the thing back together once I hi pot it for insulation and dunk it in Shellac then bake....I just need to get it apart without too much more damage...hell it's broke anyway...who knows...I might discover a new winding method that makes anyone sound 100% better no matter what their playing ability is. ...yeah and monkeys will fly out my A**.

I have alredy prepared the mrs. to expect the oven to be put to use....I know I'm going to catch hell for this. Maybe a toster oven

BTW George...think I could sand the shellac off?

Mike

[playazincs]

think I could sand the shellac off?

Mike

The shelloc the surface wont be a problem. Its the stuff between the laminations that you need to worry about... Even that only causes a problem in the first few laminations. From then on its pretty much smooth sailing.

Dont sand it either way, you could remove the covering on the laminations.

I usually use an x-acto knife to seperate.

[VelvetGeorge]

Right- no sanding. Just careful seperating. Let us know how this ordeal goes.


george