Collins 651S-1's audio output capacitor.

My extremely cool radio receiver for military Collins 651S-1 had changed audio coupling capacitor. My Collins 651S-1 was very low volume. Recently, That audio volume was getting low to day by day, I thought. But today, I found out the cause that the set was low volume. I recognized to increase audio output level by the parallel new capacitor. The cause was degraded audio output coupling capacitor.
Below is a photo the bottom side of 651S-1. The part of red arrow is audio output coupling capacitor.
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I changed new capacitor from old one. However, I didn't have same shape one. It is very slim. The collins 651S-1 original is "axial-lead type". but my capacitor is "radial-lead" type.
therefore, I decided to make I have two 470uF 35V. Top side of the capacitor put together by vinyl-tape.
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My very modern design Collins 651S-1 was fixed audio volume.
This set came from junk store of the "Middle East" two years ago. It was very dirty junk when it came to my shack. Recently, It has been getting better and better.





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この記事へのコメント

  • ja-radio

    Hello! N8EYH
    Thank you for your comment, I late reply. The 651S-1 is a really great receiver I think. I like update my blog again about 651S-1.
    Thanks,
    2013年08月12日 12:03