Airline 04BR-513 encased in mud and grime
This Airline must have been buried in an old tool shed or basement somewhere for years. It was covered in dirt and dust when I got it. No damages or missing pieces however. Nice deco looking model.
Here what a clean one looks like. Nice!
(Courtesy of radioatticarchives: http://www.radioatticarchives.com/radio.htm?radio=4492)
Here what my Airline cabinet looked like. Yuk.
Here's the inside:
Came with no tubes.
So I plugged in a good set of tubes: 35Z5, 35L6, 12SA7, 12SK7, and 12SQ7.
I turned it on and all I heard was hum. So, I went ahead and bridged the metal canister filter capacitor with good filter capacitors.
I turned it on again and initially, I still heard hum. Turns out, my 12SA7 was bad. After replacing it with a good one, it turned on but station selectivity was poor. The radio sounds distorted or garbled. I replaced a few of the beeswax capacitors and the tuning started to improve. This radio was missing the antenna so I found a spare one. It improved audio still further but still not good.
I cleaned out the tuning capacitor with some cleaner and wire brush. I was careful not to bend the tuning plates. The chassis needed a good cleaning with solvent and a wire brush too!
Next, I will do a thorough circuit check for possible bridging or loose connections. Also, I will perform an Ohmmeter test of resistors and capacitors.
Sounded much better.
Next, a good cleaning of the cabinet. Extensive polish and buff. Easier said than done. No cracks under all the grime. Wow!
I had to find a replacement antenna. Luckily, I had spare one that fit perfectly and sounded great. I also needed to reproduce a backing board. I used 1/4" heavy fiberboard. The original attachment clips were still in the cabinet so I reused those. Here's what the reproduction backing board looks like:
Not too shabby.
Here is the end result. Isn't it a beauty?
Wanna buy it?