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I'm trying to figure out why this device is acting flaky, and the root cause of the problem is thoroughly evading me. Frustrating.

It peaked at an apogee of just over 500 feet, its lowest flight yet.

 

It is descending on a new 60" Spherachutes LT, which replaces my old worn 48" Spherachute in this role. This time it kept all its fins on landing...

Ellenbrook Fields Parkrun, Feb 2018

Local fusion band, 12Eleven, performs in the background on the Oktoberfest stage on October 5, 2019. They played music for everyone to enjoy, including country and R&B hits. (Photo by Will Oliver)

The screen grid resistor of this output tube had drifted way out of spec. I think it was reading about 520 ohms. The 1.5k resistor was completely burned up and shorted out.

 

This amp will see heavy use, so I went with wire wound resistors for both output tube screen grids.

Ellenbrook Fields Parkrun, Feb 2018

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