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#1
04-07-2018, 10:24 PM
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Got scope? Checking the waveforms against the schematic (if sams that early have waveforms) should reveal issues.
Another method is to connect the heater to the output tube grid...That will inject a 60Hz signal and give the output some drive. If the output works with injected drive then you can also do the same at the osc. grid to check whether the isue is in the coupling between osc and output or a lack of oscillation.
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 
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#2
04-07-2018, 11:41 PM
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Better to couple it through a cap. Value not critical, .047 - .1 mf or so.
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#3
04-08-2018, 01:13 AM
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Guys,
I coupled the grid of the output tube to the heater and then did the same for the OSC. tube. I used a .047 cap as suggested. The first picture shows without any heater coupling to the grid. The second picture shows the Output tube. The third picture shows the OSC. tube.    Looks like when the heater is coupled to the grid of the OSC. tube I get the most Vertical. I'm puzzled. I thought it would be greater vertical with the Output tube coupled.
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