RE: How does 845 A2 happen, pinging NAZ or other for assistance

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Single Ended Triodes (SETs), the ultimate tube lovers dream.

In Reply to: How does 845 A2 happen, pinging NAZ or other for assistance posted by Eric Chan on June 14, 2022 at 04:32:16:

The gain is not mu unless the load impedance is infinite. Use mu*(RL/(rp+RL)) - it is the usual approximation. Or draw the load line on the plate curves.

The step-up interstage transformer increases the source impedance of the driver 300B, from 750 ohms to 3000 ohms, which is too high to get very far into grid current without distortion.

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Follow Ups Full Thread

Topic - How does 845 A2 happen, pinging NAZ or other for assistance - Eric Chan 04:32:16 06/14/22 (2)

RE: How does 845 A2 happen, pinging NAZ or other for assistance - Paul Joppa 07:35:13 06/14/22 (1)

RE: How does 845 A2 happen, pinging NAZ or other for assistance - Eric Chan 08:37:45 06/14/22 (0)

Follow Ups

RE: How does 845 A2 happen, pinging NAZ or other for assistance - Paul Joppa 07:35:13 06/14/22 (1)

RE: How does 845 A2 happen, pinging NAZ or other for assistance - Eric Chan 08:37:45 06/14/22 (0)

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