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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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I Searched and found the linked thread. I THINK it indicates that in the subaudio (infrasonic) frequencies, an 'N7's input impedance is an open circuit, which means to me many tens of megOhms. That means it can be ignored when calculating the filter point of its input-coupling cap, yes? So the grid-load resistor of 1M-Ohm in the case of my ASL Hurricanes is the resistance I should use in the filter formula?
- http://db.audioasylum.com/cgi/m.mpl?forum=tubediy&n=97504&highlight=6sn7+input+impedance&r=&session= (Open in New Window)
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Topic - Input impedance of a 6SN7 for calculating low-frequency filtering? - jeffreybehr 09:25:52 07/12/06 (7)
- The way to think of it is.... - JimL 14:14:32 07/12/06 (2)
- OK. TYVM, Jim. Certainly never thought about that. (NT) - jeffreybehr 14:38:47 07/12/06 (1)
- You're welcome. Sometimes we get so tied up in electronics we forget these are physical objects. :-) nt - JimL 18:01:32 07/13/06 (0)
- Re: Input impedance of a 6SN7 for calculating low-frequency filtering? - JoKath 11:32:26 07/12/06 (3)
- TYVM. THAT makes it easy. Now, how about for a KT88? - jeffreybehr 12:15:42 07/12/06 (2)
- Re: TYVM. THAT makes it easy. Now, how about for a KT88? - JoKath 12:54:34 07/12/06 (1)
- Again, TYVM. (NT) - jeffreybehr 14:39:47 07/12/06 (0)
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