[NLRS] 8478b thermister head

Dr.Gerald Johnson geraldj at ispwest.com
Mon Aug 16 10:49:00 EDT 2004


Inside the head its incredibly tiny and delicate. Likely the blocking 
capacitor is mounted on the connecter then the rest of the tender 
thermistor parts are built on behind. Remember its good to as high as the 
connector, better than 10 GHz. The odds of changing the coupling 
capacitor and making to work are essentially zero without the factory 
repair parts, jigs, and tools. Build a good blocking capacitor adapter and 
use that while shopping for another 8748.

I'm wondering if there's a solder blob shorting that input capacitor. I can't 
conceive of any way to blow it shorted and still have thermistors.

73, Jerry, K0CQ

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Entire content copyright Dr. Gerald N. Johnson, electrical engineer.
Reproduction by permission only.






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