back cover repair - UK Vintage Radio Repair and Restoration Discussion Forum

G8DLG · 7th Oct 2007, 6:31 pm

I have A Bush DAC90 with top corner of the back missing,(just burned away over the years with the heat of the dropper) I have repaired this by glueing in another piece from an old back cover,however most of the board is like powder and just flakes away.
What I wanted to know is whether there is a suitable material I can use to stabilise the cardbord,ie a resin that could be applied.I was thinking about what is used to impregnate timber rescued from the seabed to preserve it.
Any ideas?

Radio Fixer · 7th Oct 2007, 7:00 pm

I dont know if you could do a whole back cover but it works for corners. Here's what I do for them. I soak them in diluted PVA glue and then wrap a piece of plastic bag around them before clamping between pieces of wood. Leave to dry well and they come out fine with the glue drying transparent. Would I chance soaking a whole back? Probably if its falling apart, seems not much to lose.

Gary

jgj6331 · 30th Oct 2007, 4:19 am

There is a "wood hardener" made by Minwax here in the US that is used to stiffen up rotted wood in window casings and such. http://www.minwax.com/products/woodmaint/hardener.cfm I have used it with good success in such applications. It is available in small quantities and is a thin, clear liquid that brushes on readily and dries quickly. I believe such a product would be suitable for your problem. also see: http://makezine.com/pub/tool/Minwax_..._Wood_Hardener

Bill

mikelect · 30th Oct 2007, 2:17 pm

Quote:

Originally Posted by jgj6331

http://makezine.com/pub/tool/Minwax_..._Wood_Hardener

Bill

Hi I think the problem here is the US authorities won't allow this stuff in the post I couldn't get an aerosol of paint sent over, so I guess you'll have to find something similar this side of the pond, just had a thought

dilute PVA should do it if it is then pressed flat and left for a while HTH

Mike

Nickthedentist · 30th Oct 2007, 7:30 pm

Ronseal also do a wood hardener, avaialable from Homebase, B&Q etc.

But frankly, PVA is probably a better bet.

7th Oct 2007, 6:31 pm	#1
G8DLG Retired Dormant Member Join Date: Aug 2006 Location: London, UK. Posts: 48	back cover repair I have A Bush DAC90 with top corner of the back missing,(just burned away over the years with the heat of the dropper) I have repaired this by glueing in another piece from an old back cover,however most of the board is like powder and just flakes away. What I wanted to know is whether there is a suitable material I can use to stabilise the cardbord,ie a resin that could be applied.I was thinking about what is used to impregnate timber rescued from the seabed to preserve it. Any ideas?

7th Oct 2007, 7:00 pm	#2
Radio Fixer Retired Dormant Member Join Date: Jun 2006 Location: thorpe bay Posts: 25	Re: back cover repair I dont know if you could do a whole back cover but it works for corners. Here's what I do for them. I soak them in diluted PVA glue and then wrap a piece of plastic bag around them before clamping between pieces of wood. Leave to dry well and they come out fine with the glue drying transparent. Would I chance soaking a whole back? Probably if its falling apart, seems not much to lose. Gary

30th Oct 2007, 4:19 am	#3
jgj6331 Retired Dormant Member Join Date: Oct 2007 Location: Macon, Georgia, USA. Posts: 30	Re: back cover repair There is a "wood hardener" made by Minwax here in the US that is used to stiffen up rotted wood in window casings and such. http://www.minwax.com/products/woodmaint/hardener.cfm I have used it with good success in such applications. It is available in small quantities and is a thin, clear liquid that brushes on readily and dries quickly. I believe such a product would be suitable for your problem. also see: http://makezine.com/pub/tool/Minwax_..._Wood_Hardener Bill

30th Oct 2007, 7:30 pm	#5
Nickthedentist Dekatron Join Date: Jan 2005 Location: Oxford, UK. Posts: 17,865	Re: back cover repair Ronseal also do a wood hardener, avaialable from Homebase, B&Q etc. But frankly, PVA is probably a better bet.