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12th May 2010, 04:10 AM
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#1 |
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diyAudio Member
Join Date: Feb 2010
Location: calgary alberta tundra canada
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twin triode question
i pulled a pcb that has two 6cg7s on it and the grids on sections 2 are connected to the plates on sections 1 with 100 ohm resistors on both tubes. what is the purpose of this?
thanks |
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12th May 2010, 04:40 AM
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#2 |
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diyAudio Member
Join Date: May 2006
Location: Rural Nevada
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It looks like the output of section 1 is direct-coupled to the input of section 2, with the 100 ohm resistor acting as a "grid stopper" to prevent possible oscillations. This may very well be a gain stage direct-coupled to a cathode-follower. You would have to trace out the rest of the circuit to see what is going on. This is not an unusual configuration.
- John Atwood |
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