I found in a lot of radios I repaired over the years that the engineer that designed the radio would put in the smallest (voltage wise) caps that they could and still get them to work for X amount of time. There might only be a couple of pennies difference in the price of the different caps. but when you take those couple of pennies and multiply that by 10,000 - 20,000 radios, then you are looking at some serious money. If they do that with just about every part in the radio, then you have cut the price of the radio in half. Probably cut the life in half also.



Many times I have seen a 10 volt cap in a 12 volt circuit.