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Repairing a miserable Motorola 555. Help!

vswr

Disinterested observer
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Aug 20, 2023
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When I got this radio, it was receiving fine but had an intermittent transmit problem. When I decided to reflow the board, I lost everything. Now I hear a faint and untunable USB channel on all 40 which tells me ive screwed up my vco or pll. I have another 555 that has no receive, transmits perfectly on frequency on all 40 but in receive mode all I get is static and the needle pins. Any help would be appreciated.
 
  • Wow
Reactions: doffo

Oh. I forgot to mention that I used a proper soldering iron and I've done many radios before so its probably something simple yet hard to locate
 

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