Fix radio paper easily

Aug 6th, 2022
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How to fix radio paper

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hi everyone and welcome to another episode of mr carlsons lab today were going to fix a radio receiver together the story goes like this the person that had this radio receiver tried to do a restoration on it and it never worked again so usually this goes one of two ways usually its really really bad when you open it up and parts and pieces are hanging everywhere or its a really good restoration and something minor went wrong at any rate were going to find this out together so lets discover what went wrong in this radio and bring it back to life again lets get started heres the radio that we are going to get working today very simple little radio rca victor and everything feels good the needle moves and it turns on and off makes the switch clicks anyways i havent plugged it in at this time on the back side its got a screw here and a screw here theyre both different hopefully theyre not threaded into a cracked bakelite case inside so usually they put a schematic or diagram

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Radio restorers are always on the lookout for 01A tubes ($10-$15) used in most 1920s radios. These tubes also used the numbers 201A and 301A depending on the manufacturer. Other early tube numbers to watch out for are 45 ($50-$70), 50 ($200+), 245 ($100+), 250 ($250-$350), WD-11 ($50-$135), and WD-12 ($30-$50).
This means the film capacitors traditionally used by electronics engineers arent always the best option. Instead, multi-layer ceramic capacitors (MLCCs) are emerging as an excellent alternative to film capacitors.
Plastic / polyester film capacitors are now used in place of paper capacitors due to their smaller size, lower cost and superior performance. There are many variations of plastic / polyester capacitors.
In general, you can go as much as 100% higher than the original capacitance value. For example, when replacing a 10-mfd electrolytic capacitor in the radios power supply, it is OK to use a 20-mfd or 22-mfd replacement. Likewise, you could replace a 20 with a 33.
Paper capacitor is also known as a fixed capacitor in which paper is used as the dielectric material. The amount of electric charge stored by the paper capacitor is fixed. It consists of two metallic plates, and paper, which is used as a dielectric material, is placed between these plates.
Tube-powered radios are simple in comparison to modern electronics. Most were built to conventional designs and they use replacement parts that are still readily available. Fixing old radios can be an enjoyable hobby and you can also learn about a key technology of the modern era.
With all the available literature on Film and Aluminum electrolytic capacitor comparison, it is clear that direct replacement (one to one) is not possible.
Follow these general steps to restore your radio: Do not power on your radio. Find a service manual. Replace all electrolytic and paper capacitors with new ones of similar value and same or better voltage rating. Examine closely and replace anything that looks damaged, such as burned up resistors.
By 1967 the last of the remaining manufacturers would end production of tube radios.
The main cause of age-related problems in an old radio are the capacitors. Vintage caps were made of cardboard, foil, paper, and wax, and just dont hold up well over time especially not 50+ years. After so long, the materials have just degraded to the point where they no longer work as capacitors.

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