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D3a vs 417A
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Posted on March 17, 2017 at 07:07:23 | ||
Posts: 8
Joined: March 9, 2017 |
Hello! What if this circuit replacing with D3a (wired in triode), I know the output impedance should be high without any buffer stage and line output transformer. What is the output impedance can you think of? Should we adopt the 110 ohm cathode resistor value from Andrea Ciuffoli headphone amplifier design? http://www.audiodesignguide.com/NewHeadphoneAmp/sch1.gif What is the plate load resistor?? The B+ is 180v. |
RE: D3a vs 417A, posted on March 21, 2017 at 04:00:02 | |
Posts: 8
Joined: March 9, 2017 |
I forgot to mention the plate load resistor would be 10K. Any thoughts?? |
RE: D3a vs 417A, posted on March 18, 2017 at 05:33:13 | |
Posts: 8
Joined: March 9, 2017 |
What about this one?? |