![]() 002 mf, 600v_.0022mf, 1000v Dry Electrolytic_Replaced withĢ0 mf, 150v_22 mf, 160 Note 1: You can save some money by purchasing radial leads over axial. The following is a list of capacitors used in the AL130. Is is polarized? If not, replace it with one that is and see if your radio requires an Isolation Transformer. It's important to note though that while a simple cap job willl ensure clean and uninterrupted operation, to reduce the potential for electric shock or component failure (read: house on fire), be sure to take note of the radio's power cord. V3 6Q7 Detector-AVC-Audio Frequency AmplifierĪpart from those that were heavily abused, most tube radios can be put into working condition by replacing older paper/wax capacitors with new ones of equal or similar value (+/- 20%). Sometimes the tube part number is labeled on the socket, but if yours is blank, a quick Google should fill you in. If you need to replace any tubes, now is the time to make a list. Loose or cracked joints can be cleaned up and re-soldered as necessary, provided the component is still in good condition. 03 cent part is generally not worth the risk of burning your house down. If a lead is broken or not within the spec, replace with new. Check for cracked or loose solder points. Check resistors for tolerance (+/- 10% is acceptable), wiring, acoustic, and tuning components. Unplug the radio from the wall and let rest for several hours (overnight is best). Also, common sense dictates that at no point should you lick your soldering iron. I'm not going to beat up on it to much, but I strongly recommended that you visit his site and read up on before proceeding any further. These projects can get you seriously injured or killed if you throw caution to the wind. Doug Criner's site ( ) has an excellent article on the hazards and checks warranted for any kind of radio/electrical restoration. This radio is still in good condition for being 73 years old but, needed TLC on the cabinet (wood case), as well as new vacuum tubes and a top-to-bottom capacitor replacement. (1) Single Pole, Single Throw (SPST) slide switch w/ 2 screws (1) 1/8" audio jack (male) or headphone cord (1) Small pre-drilled PCB appx 4cm x 4cm Small project enclosure (not shown here) MP3 player (the iPod Shuffle later used is ideally suited for random play, like a radio) -Bonus points for downloading period correct MP3s from Soldering iron & station (beginner soldering skills) Wire strippers, diagonal cutters, needle nose pliers The following links proved indispensable during the course of this project. This is commonly known as an "All American 5" (AA5) design and makes parts easy to track down through various online suppliers. In our example, the AL130 is quite common in that it only needs 5 tubes a balast, and a few capacitors. DO NOT PLUG IT IN YET! Doing so without giving it a look through for short circuits, bad wiring, or living things (not a joke) may be the last thing you do in this world or at the least, justify nasty looks and name-calling from your local firefighter. Once you get a general idea of what size/shape/era you like, research a few makes/models to determine the rarity of parts in the event your radio is missing components. Actually playing The Police through your radio is optional, but highly recommended. The most common bands are AM, FM, ShortWave, and Police. The first step is to dig around the innerwebs and look at some of the styles manufactured during different periods, taking note of the frequencies they operate in. Sometimes with handle but for mains only). Power type and voltage: AC/DC-set / 105-125 Volt Speaker: Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 5.5 inch = 14 cm Material: Wood case (Ingraham Cabinet, Bristol, CT) Shape: Tablemodel, Mantel/Midget/Compact but not a Portable (See power data. Type: Radio / Tuner Valves / Tubes: 5 total (6A7, 6D6, 6Q7, 25L6, 25Z5) + Balast Audio: Principle Super-Heterodyne (Super in general) IF-Freq 456 kHz 2 AF stage(s) Band: Tuned circuits 6 AM circuit(s), Wave bands Broadcast (MW), Police, sometimes also early TV (75-200m). Manufacturer/Brand: Emerson Radio & Phonograph Corp., New York, NY Model: AL130 Country: United States of America (USA) Year: 1937 The model used in this rebuild is a 1936/1937 Emerson AL130 purchased on eBay for less than $60 with restoration/upgrade components rounding out to around $150 (includes Priority shipping).įrom. This project does not rely on making permanent changes or modifications beyond cosmetic repair and is a great way to introduce novice electrical, radio, or woodworking enthusiasts to what was once the entertainment equivalent of a 60-inch LCD TV. ![]() This i'ble will take you though the restoration of a vintage tube radio to near-original condition and in the process, upgrade it to play to MP3s with a low cost, easy to build AM transmitter. ![]()
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