12-25-2013, 04:40 PM
Ok, another day, another question.
One of the bakelite blocks (item 8 ) in this radio contains two caps with values of .09 uF and 700 uuF. There is another block, item 26, that contains two 110 uuF caps. With other radios I've worked on, capacitors in this range would be mica caps. From what I've read and from my modest experience these caps tend to be pretty stable and don't require replacement. I haven't changed any of them in my other radios and all of the radios have worked after restoration.
Additionally, regarding item 8, the 700 uuF cap is in the oscillator and I presume it is probably a precision cap and couldn't just be replaced by any 20%-accurate cap. So what I did was disconnect the wires to the terminal that has the .09uF cap and wired in a .1 uF cap external to the bakelite block. I left the 700 uuF cap circuitry untouched.
So the question de jour is: Are these low-value caps mica caps that can just be left alone? Does my strategy for dealing with the item 8 block make sense?
Thanks and merry Christmas.
Jon
One of the bakelite blocks (item 8 ) in this radio contains two caps with values of .09 uF and 700 uuF. There is another block, item 26, that contains two 110 uuF caps. With other radios I've worked on, capacitors in this range would be mica caps. From what I've read and from my modest experience these caps tend to be pretty stable and don't require replacement. I haven't changed any of them in my other radios and all of the radios have worked after restoration.
Additionally, regarding item 8, the 700 uuF cap is in the oscillator and I presume it is probably a precision cap and couldn't just be replaced by any 20%-accurate cap. So what I did was disconnect the wires to the terminal that has the .09uF cap and wired in a .1 uF cap external to the bakelite block. I left the 700 uuF cap circuitry untouched.
So the question de jour is: Are these low-value caps mica caps that can just be left alone? Does my strategy for dealing with the item 8 block make sense?
Thanks and merry Christmas.
Jon