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Tunnel Diode Replacement and Modification: Difference between revisions
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Tunnel Diode Replacement and Modification (view source)
Revision as of 20:02, 11 April 2021
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Step by Step Modification Instructions: | Step by Step Modification Instructions: | ||
1. Replace the bad 10mA Tunnel Diode (D245) with a new 4.7mA Tunnel Diode (e.g. [[1N3717]] or | 1. Replace the bad 10mA Tunnel Diode (D245) with a new 4.7mA Tunnel Diode (e.g. [[1N3717]] or [[Russian tunnel diodes]]). | ||
2. Replace transistors Q234 and Q244 with silicon transistors having Ft around 200MHz and Beta around 100, such as 2N4248. | 2. Replace transistors Q234 and Q244 with silicon transistors having Ft around 200MHz and Beta around 100, such as 2N4248. | ||