Back panel restoration - UK Vintage Radio Repair and Restoration Discussion Forum

GSBX1220 · 22nd Feb 2023, 1:34 pm

Hi Folks

Looking to improve the back panel on the Tandberg Solvsuper 10 that I'm working on.

looks like the card is de-laminating and is a bit soft and fragile round the damaged areas.

Any thoughts on how to tackle this? is it a case of dampening the panel and putting it under weight for a while?

Silicon · 22nd Feb 2023, 8:24 pm

I understand that some wood products relied on the natural chemistry of the wood.

Heat and pressure during manufacture caused the cellulose fibres to bond together.

You may want to consider soaking the fibres with water based adhesives and then clamping it between some non-stick surfaces.

stevehertz · 22nd Feb 2023, 9:14 pm

In a not dissimilar application, using a fine implement (jeweler's screwdriver, pin etc) I inserted thin superglue between the delaminated sections and clamped the board having first placed thin plastic sheet on the clamped areas to stop the clamp sticking to the board. Post 26 in this thread provides a tad more detail and photos: https://vintage-radio.net/forum/show...=195703&page=2

GSBX1220 · 23rd Feb 2023, 11:44 pm

Thanks.

Never thought of trying superglue. Might give that a try as it would be quick to see what result I would get.
One of my thoughts was to maybe inject some wood glue in between the laminations and press under a heavy weight for a few days.

stevehertz · 24th Feb 2023, 8:50 am

Quote:

Originally Posted by GSBX1220

Thanks.

Never thought of trying superglue. Might give that a try as it would be quick to see what result I would get.
One of my thoughts was to maybe inject some wood glue in between the laminations and press under a heavy weight for a few days.

By all means try it but thin superglue is much easier to get all the way in, compared to gloopy wood glue.

Silicon · 24th Feb 2023, 11:45 pm

Water based glue can be diluted so that it has a milky consistency.

This improves its wetting ability.

Another liquid I would consider using is the volatile solvent based 'wood hardener'.
It is used to stabilise decayed wood when repairing window frames, etc.
It penetrates between the wood fibres.

You would have to work very quickly because it dries in seconds.

GSBX1220 · 26th Feb 2023, 9:51 pm

A few options there.
Never thought of the wood hardener. That might work, and could give some added strength to the panel.
I recon I might try the superglue method on one of the smaller parts and see how that goes and how much strength it gives. This is mainly because I have superglue here.

Thanks guys!

GSBX1220 · 4th Mar 2023, 11:44 am

Job done!

I went with the Superglue suggestion. thanks! That worked a real treat.

I used some Kapton tape stick to some card either side of the repairs whilst it was being pressed under a large lead acid battery.

stevehertz · 4th Mar 2023, 11:52 am

Glad it worked, good neat job you did there.

22nd Feb 2023, 1:34 pm	#1
GSBX1220 Pentode Join Date: Jun 2018 Location: Glasgow, Scotland,UK. Posts: 127	Back panel restoration Hi Folks Looking to improve the back panel on the Tandberg Solvsuper 10 that I'm working on. looks like the card is de-laminating and is a bit soft and fragile round the damaged areas. Any thoughts on how to tackle this? is it a case of dampening the panel and putting it under weight for a while? Attached Thumbnails __________________ Richard

22nd Feb 2023, 8:24 pm	#2
Silicon Nonode Join Date: Jun 2007 Location: Coulsdon, London, UK. Posts: 2,162	Re: Back panel resteration I understand that some wood products relied on the natural chemistry of the wood. Heat and pressure during manufacture caused the cellulose fibres to bond together. You may want to consider soaking the fibres with water based adhesives and then clamping it between some non-stick surfaces.

22nd Feb 2023, 9:14 pm	#3
stevehertz Dekatron Join Date: Sep 2011 Location: Rugeley, Staffordshire, UK. Posts: 8,830	Re: Back panel resteration In a not dissimilar application, using a fine implement (jeweler's screwdriver, pin etc) I inserted thin superglue between the delaminated sections and clamped the board having first placed thin plastic sheet on the clamped areas to stop the clamp sticking to the board. Post 26 in this thread provides a tad more detail and photos: https://vintage-radio.net/forum/show...=195703&page=2 __________________ A digital radio is the latest thing, but a vintage wireless is forever..

23rd Feb 2023, 11:44 pm	#4
GSBX1220 Pentode Join Date: Jun 2018 Location: Glasgow, Scotland,UK. Posts: 127	Re: Back panel resteration Thanks. Never thought of trying superglue. Might give that a try as it would be quick to see what result I would get. One of my thoughts was to maybe inject some wood glue in between the laminations and press under a heavy weight for a few days. __________________ Richard

24th Feb 2023, 11:45 pm	#6
Silicon Nonode Join Date: Jun 2007 Location: Coulsdon, London, UK. Posts: 2,162	Re: Back panel restoration Water based glue can be diluted so that it has a milky consistency. This improves its wetting ability. Another liquid I would consider using is the volatile solvent based 'wood hardener'. It is used to stabilise decayed wood when repairing window frames, etc. It penetrates between the wood fibres. You would have to work very quickly because it dries in seconds.

26th Feb 2023, 9:51 pm	#7
GSBX1220 Pentode Join Date: Jun 2018 Location: Glasgow, Scotland,UK. Posts: 127	Re: Back panel restoration A few options there. Never thought of the wood hardener. That might work, and could give some added strength to the panel. I recon I might try the superglue method on one of the smaller parts and see how that goes and how much strength it gives. This is mainly because I have superglue here. Thanks guys! __________________ Richard

4th Mar 2023, 11:44 am	#8
GSBX1220 Pentode Join Date: Jun 2018 Location: Glasgow, Scotland,UK. Posts: 127	Re: Back panel restoration Job done! I went with the Superglue suggestion. thanks! That worked a real treat. I used some Kapton tape stick to some card either side of the repairs whilst it was being pressed under a large lead acid battery. Attached Thumbnails __________________ Richard

4th Mar 2023, 11:52 am	#9
stevehertz Dekatron Join Date: Sep 2011 Location: Rugeley, Staffordshire, UK. Posts: 8,830	Re: Back panel restoration Glad it worked, good neat job you did there. __________________ A digital radio is the latest thing, but a vintage wireless is forever..