"The Companion" By Bulova Model-206 Portable AM Tube Radio : 無料・フリー素材/写真
"The Companion" By Bulova Model-206 Portable AM Tube Radio / Andrew Pilling
| ライセンス | クリエイティブ・コモンズ 表示-改変禁止 2.1 |
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| 説明 | This Teal Blue "Companion" by Bulova portable AM radio, model 206 was a nice (curbside) find. The body was in pretty good condition, so I opened the back of the radio and noticed that the two (ancient) D batteries were corroded and caused mild staining with no apparent damage to the interior. I also noticed that one of the four vacuum tubes, a (1U5) tube was MIA. After a look-see in the tube bible; which informed me that there were similar tubes with different pin allocations but, there weren't any identical substitution tubes. I was able to find and replace the (1u5) vacuum tube. Next without performing any kind of tests, I rolled the dice and turned it on. "EUREKA" once again another roadside find started up and worked, then the inevitably dreaded (par for the course) obligatorily telltale HUM of all HUMS became quite apparent. So I turned on and warmed up my favorite and trustworthy VTVM-voltmeter (the Hewlett Packard 410B). With voltmeter probes in hands, I went right to the usual suspect, The infamous electrolytic filter capacitor. It was shot; so I left it in place, being that they are a Royal pain on my patience to desolder, remove, disassemble and gut out the filter caps fragile cylindrical cardboard housing to be stuffed with three new electrolytic capacitors, then reassemble and solder the component back into place, So I performed a bypass using three new e-caps, carefully tucking them inside of the tightly cramped under carriage of the chassis. I turned it on and the HUM was no longer noticeable, "VOILA" it works. This Bulova "Companion" portable radio will be a nice addition to my collection. |
| 撮影日 | 2011-09-24 17:13:20 |
| 撮影者 | Andrew Pilling |
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