View Full Version : Sonora 302 restoration


bandersen
10-18-2013, 11:51 AM
I wanted to squeeze in one last major refinishing job before the cold weather arrives. eenie meenie miney mo - this Sonora 302 is it.

Here's the thread from when I got it last year: http://www.videokarma.org/showthread.php?t=254990

http://farm9.staticflickr.com/8003/7580134844_ae120f82c3_c.jpg (http://www.flickr.com/photos/70039806@N00/7580134844/) http://farm9.staticflickr.com/8293/7580132718_ac18e14b65_c.jpg (http://www.flickr.com/photos/70039806@N00/7580132718/)

It's an interesting design that uses a variable capacitor for continuous tuning. Looks very easy to work on :yes:
http://farm8.staticflickr.com/7138/7587524350_afd918945a_c.jpg (http://www.flickr.com/photos/70039806@N00/7587524350/) http://farm9.staticflickr.com/8292/7587523564_d38032ac51_c.jpg (http://www.flickr.com/photos/70039806@N00/7587523564/)

Over the last year, thanks to some reference photos from Eric H and a lot of luck, I was able to track down a complete set of knobs including the continuous tuning channel plate!

http://farm8.staticflickr.com/7409/8716465528_df979d894c_c.jpg (http://www.flickr.com/photos/70039806@N00/8716465528/)


This is easily the crappiest cabinet I've encountered. It's a basic plywood box with little bracing and mismatched veneer. As you can see, it's warped over the years especially on the side with the missing brace and the top.

http://farm4.staticflickr.com/3767/9905237684_a477bcd8a0_c.jpg (http://www.flickr.com/photos/70039806@N00/9905237684/) http://farm8.staticflickr.com/7324/9905169635_1055d0a79e_c.jpg (http://www.flickr.com/photos/70039806@N00/9905169635/)

The top is also stained and nasty looking.
http://farm8.staticflickr.com/7456/9905216746_305ef228cc_c.jpg (http://www.flickr.com/photos/70039806@N00/9905216746/)

I started by removing the brass trim, safety glass and metal bezel. Then moved on to reinforcing the cabinet.
http://farm4.staticflickr.com/3687/9909709674_61c794d716_c.jpg (http://www.flickr.com/photos/70039806@N00/9909709674/)

I used a sturdy piece of oak across the top. That's better! I later had to cut out an arch otherwise the CRT wouldn't fit inside.
http://farm3.staticflickr.com/2878/9959829885_ed0d685561_c.jpg (http://www.flickr.com/photos/70039806@N00/9959829885/)


Here's the cabinet after stripping. I also used a little bleach on top to remove the worst of the staining.
As you can see, it's mahogany.
http://farm8.staticflickr.com/7406/9974451185_d395616550_c.jpg (http://www.flickr.com/photos/70039806@N00/9974451185/)

As for this side, I'm not sure what it is exactly. Low grade mahogany ? Cherry ? It sure doesn't match the top or other side.
http://farm3.staticflickr.com/2871/9974585803_1d31976bc6_c.jpg (http://www.flickr.com/photos/70039806@N00/9974585803/)

All patched up, grain filled and ready for some color :)
http://farm6.staticflickr.com/5334/10094167306_2feaf3134e_c.jpg (http://www.flickr.com/photos/70039806@N00/10094167306/)

bandersen
10-18-2013, 12:04 PM
I sprayed it up in the attic using a coat of Mohawk "Red Cherry/Mahogany" follow by "Brown Mahogany".
I discovered the metal bell of a 16GP4 makes a great spraying stand :)

http://farm9.staticflickr.com/8262/10176730745_7ec03d84f0_c.jpg (http://www.flickr.com/photos/70039806@N00/10176730745/)

I though I'd be repainting the bezel but it cleaned up very well.
http://farm8.staticflickr.com/7362/10214222603_6e225b3614_c.jpg (http://www.flickr.com/photos/70039806@N00/10214222603/)

I spent a few hours polishing up the brass control panel then coated with lacquer.
http://farm4.staticflickr.com/3799/10217654416_f619868df4_c.jpg (http://www.flickr.com/photos/70039806@N00/10217654416/)

http://farm6.staticflickr.com/5486/10214905994_a1e1b3d120_c.jpg (http://www.flickr.com/photos/70039806@N00/10214905994/)

And that's that! It turned out much better than I expected in the end.

I'll probably get around to the electronics over the winter. Right now, I have a Dumont RA113 calling.
http://farm8.staticflickr.com/7309/10217491124_8372ffb1fd_b.jpg (http://www.flickr.com/photos/70039806@N00/10217491124/)

http://farm9.staticflickr.com/8418/10217575375_15a3edc429_b.jpg (http://www.flickr.com/photos/70039806@N00/10217575375/)

decojoe67
10-18-2013, 04:34 PM
I enjoyed your vid Bob and these pics too. That set really came out beautiful! You turned a set that you'd might not take notice of become a real jewel. You have to love the maroon and gold colors they used back then. Very rich combination.
Joe

Bill Cahill
10-18-2013, 06:31 PM
Very fine job. That panel is very low grade mahoganny.
You did a great job on it....
Bill Cahill

baursam
10-18-2013, 11:49 PM
Beautiful job Bob, as always.