UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Leon Crampin · 29th Jun 2012, 1:10 pm

I would suggest slow-set Araldite, but applied very sparingly and warmed to make it less viscous. The phenolic parts should also be well warmed, so any sensitive components such as the movement and the bridge rectifier should be removed first.

Have a pre-arranged means of pre-loading the joint, and allow the adhesive to set in a warm location. The idea is that warming lowers the viscosity of the resin allowing it to penetrate the porous surface of the phenolic. A very strong bond will result if you achieve this.

Put your "spare" adhesive in the same warm place as the workpiece, and test periodically with a knife to see when it can be pared away cleanly. Take a sharp knife and clean up the exuding adhesive on the front and edges of the panel. If you get your timing right, you can make the joint almost invisible and the surplus adhesive will just peel away like a rubbery string.

I wish your AVO a speedy recovery - I've had a few in intensive care, but never to this extent...

Leon.

29th Jun 2012, 1:10 pm	#2
Leon Crampin Octode Join Date: Nov 2005 Location: Surrey, UK. Posts: 1,874	Re: Advice Req. reparing AVO Front I would suggest slow-set Araldite, but applied very sparingly and warmed to make it less viscous. The phenolic parts should also be well warmed, so any sensitive components such as the movement and the bridge rectifier should be removed first. Have a pre-arranged means of pre-loading the joint, and allow the adhesive to set in a warm location. The idea is that warming lowers the viscosity of the resin allowing it to penetrate the porous surface of the phenolic. A very strong bond will result if you achieve this. Put your "spare" adhesive in the same warm place as the workpiece, and test periodically with a knife to see when it can be pared away cleanly. Take a sharp knife and clean up the exuding adhesive on the front and edges of the panel. If you get your timing right, you can make the joint almost invisible and the surplus adhesive will just peel away like a rubbery string. I wish your AVO a speedy recovery - I've had a few in intensive care, but never to this extent... Leon.