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 Post subject: American Bosch Model 450 Warped Veneer Repair
PostPosted: Feb Thu 23, 2017 2:54 pm 
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Hello everyone,

I am currently in the process of restoring my American Bosch Model 450 tombstone radio. I know that it was made in Springfield MA, and was wondering if it is rare at all, since a Google search revealed very little information on it, except for schematics.

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Last edited by 5Y4GT on May Mon 08, 2017 12:54 am, edited 1 time in total.

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 Post subject: Re: American Bosch Model 450: Rare radio?
PostPosted: Feb Fri 24, 2017 9:34 am 
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It's very rare. I can't even find a picture of it in this thread! :shock: :lol:

Sorry. Google circular reference...


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 Post subject: Re: American Bosch Model 450: Rare radio?
PostPosted: Feb Fri 24, 2017 1:44 pm 
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Is this what your radio looks like?

Attachment:
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American Bosch 450.jpg
American Bosch 450.jpg [ 134.93 KiB | Viewed 2616 times ]


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 Post subject: Re: American Bosch Model 450: Rare radio?
PostPosted: Feb Fri 24, 2017 2:33 pm 
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Yes. That's it. Got it for $9 since the front was completely de-laminated. It was in pretty sad shape: missing all knobs, missing on/off-volume switch, etc. Miraculously, the speaker was in perfect condition. I'll post some pics soon.

EDIT 7/4/27

Lol, the speaker had an open field coil that I had to get rewound. Needless to say, it wasn't in perfect condition.

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Last edited by 5Y4GT on Jul Wed 05, 2017 3:22 am, edited 1 time in total.

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 Post subject: Re: American Bosch Model 450: Rare radio?
PostPosted: Feb Fri 24, 2017 2:56 pm 
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Well, I can't upload pictures because the file size is too large. Have to find some other way to do so.

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 Post subject: Re: American Bosch Model 450: Rare radio?
PostPosted: Feb Fri 24, 2017 3:57 pm 
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 Post subject: Re: American Bosch Model 450: Rare radio?
PostPosted: Feb Fri 24, 2017 9:36 pm 
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Here's the radio. Sorry about the bad image quality (I had to resize it). There's some very bad delamination on the front, and the front substrate has actually split in three places. The cabinet needs a brand new front panel. The only piece I can salvage from the front is a piece of veneer that has the American Bosch logo on it, although I have to un-warp it.


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rsz_img_3561.jpg
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 Post subject: Re: American Bosch Model 450: Rare radio?
PostPosted: Feb Fri 24, 2017 10:07 pm 
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I have an AB with diff style cabinet, but that same dial.
Mine is missing the tuning knob.

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 Post subject: Re: American Bosch Model 450: Rare radio?
PostPosted: Feb Fri 24, 2017 11:01 pm 
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I believe they made several variations of that model: 450, 451, 454.

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 Post subject: Re: American Bosch Model 450: Rare radio?
PostPosted: Feb Sun 26, 2017 7:17 pm 
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Does anyone know where I might be able to find similar knobs for this radio? The tuner knob is a combo knob with an outer one for am tuning and an inner one for fine tuning on SW.

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 Post subject: Re: American Bosch Model 450: Rare radio?
PostPosted: Feb Sun 26, 2017 7:40 pm 
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There are a good half dozen knobs vendors on the suppliers list, which is a sticky post at the top of the Tubes and Parts forum.

I would start by canvassing them.

viewtopic.php?f=19&t=201537

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 Post subject: Re: American Bosch Model 450: Rare radio?
PostPosted: Feb Sun 26, 2017 7:52 pm 
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Thanks. Will probably look for knobs soon, after I power up my radio.

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 Post subject: Re: American Bosch Model 450 Warped Veneer Repair
PostPosted: May Mon 08, 2017 12:54 am 
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Please move to cabinet restoration.

-Thanks!

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 Post subject: Re: American Bosch Model 450 Warped Veneer Repair
PostPosted: May Mon 08, 2017 12:57 am 
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Should I spray the warped substrate with water and flatten it out, then let it dry overnight? The substrate (the first layer) is as thin as veneer and isn't that badly warped.

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 Post subject: Re: American Bosch Model 450 Warped Veneer Repair
PostPosted: May Tue 09, 2017 11:21 pm 
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I was thinking of spraying the substrate with water, pushing it flat with weights, and then letting it dry overnight. Is this an okay way to going about unwarping veneer.

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 Post subject: Re: American Bosch Model 450 Warped Veneer Repair
PostPosted: May Fri 26, 2017 4:09 pm 
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Don't bother trying to flatten if the warp is too great.

When I first tried this I experimented on a couple of junky average radios, stripping off their fronts and sides and applying a new piece of mahogany. This gets a bit more compicated if the manufacturer used an exotic veneer on the front or if the grain pattern was cut at angles. You can buy self-stick veneer, (which I don't use) or a paper-backed veneer. I usually cut it with a huge sewing scissor and fine trim with a razor blade. I've grown fond of gluing large pieces using a wood glue and a steam iron. The steam iron is very useful, and boils the glue dry in a few seconds. If you have knob and dial holes, just veneer a flat single piece over them, and trim out the holes carefully when it's dry. Smaller pieces you can clamp overnight, just use blocks to avoid clamp depressions in the veneer. I forgot to mention, that I use wood glue since I have some time to position the peice just right before the glue sets up. Self-stick you have to get it right the first time for large pieces.

Practice, practice, so I recommend trying on some junky cabinets before going for broke on your unique radio.

Here's a radio where I replaced a warped piece of veneer. It's the left hand top piece. I chiseled off the old warped peice with a putty knife, and the glue was still hard, so you can use a big of water to soften the existing glue.

http://antiqueradios.com/forums//viewtopic.php?f=1&t=172330

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 Post subject: Re: American Bosch Model 450 Warped Veneer Repair
PostPosted: May Fri 26, 2017 8:00 pm 
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Well, I was able to un-warp two pieces of veneer successfully. Thanks for the advice though. I think I will glue down the substrate on a piece of un-warped wood, since it is not that badly warped.

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 Post subject: Re: American Bosch Model 450 Warped Veneer Repair
PostPosted: Jun Tue 06, 2017 6:17 pm 
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Just a quick update:

I'm going through a pretty intense front panel reconstruction on the cabinet. The original panel had pieces missing and had a few splits in it, but was otherwise sturdy, so I decided to reuse it. I glued back the peeling layers of the substrate and also reassembled most of the front panel scrollwork using the pieces I had. I have just cut the last piece for the scrollwork on the front panel and will soon be able to apply the last piece of substrate and the salvaged veneer. It's taking awhile, but coming together none the less!

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 Post subject: Re: American Bosch Model 450 Warped Veneer Repair
PostPosted: Jun Fri 09, 2017 8:57 pm 
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Okay, another update:

The final substrate layer and salvaged veneer pieces have been reapplied to the cabinet, and I am happy with the results. I still have to fill in spots of missing veneer, but the cabinet is probably about 90% done by now. Sorry about the lack of pics. I want to wait till I get the cabinet done a little more to take them.

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 Post subject: Re: American Bosch Model 450 Warped Veneer Repair
PostPosted: Jul Wed 05, 2017 3:20 am 
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Lazy/busy me finally got around to posting some pics.

1. Overview of the whole cabinet as it is right now. Gonna need to get some new veneer to patch sections of existing veneer and replace missing sections.
2. Picture of where I patched sections of cabinet with pieces of scrap veneer I have around. (Some of the patches are different colors, so I will have to figure out how to fix that later).
3. Picture of a section of the grille that was missing the main substrate layer. I still have to trim down the substrate patch that I made and add some veneer.
4. Picture of the side of the cabinet where I am in the process of fixing an area of veneer that didn't glue down on the initial reassembly of the cabinet.


Attachments:
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rsz_img_3608.jpg [ 93.26 KiB | Viewed 1456 times ]
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rsz_img_3610.jpg
rsz_img_3610.jpg [ 114.78 KiB | Viewed 1456 times ]

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