549/Repairs: Difference between revisions

549/Repairs (view source)

28 bytes removed , 28 August 2023

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 * Root cause: Cathode choke (L862) hairline fracture of magnet wire
-===Vertical amplificatio absent===
+===No vertical amplification===
-No vertical amplification Caused by v514 side delay line short circuit. In the drawing you can see the resistive values measured without the transistors for the working model and for the non-working one. In the photo you can also see how the delay line has been replaced, being impossible to find it on the market. Surely the calibration will have to be done again but the instrument is usable
+Caused by V514 side delay line short circuit. In the drawing you can see the resistive values measured without the transistors for the working model and for the non-working one. In the photo you can also see how the delay line has been replaced, being impossible to find it on the market. Surely the calibration will have to be done again but the instrument is usable.
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