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1. Re: [Amps] [BULK]Re: [BULK]Re: cathode to ground in tetrode amp (score: 1): Author: John Popelish <jpopelish@rica.net>; Date: Mon, 30 Jan 2006 21:01:18 -0500; Thanks for the link. Here are some of the numbers: The cathode LC resonance (just the 15 uH and .01 uF) produce an impedance peak at .41 MHz. That would notch out frequencies near that (a little lowe; /archives//html/Amps/2006-01/msg00748.html (10,456 bytes)
2. Re: [Amps] [BULK]Re: [BULK]Re: cathode to ground in tetrode amp (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Mon, 30 Jan 2006 21:17:02 -0500; Joe, The original design (black drawing) came from a Russian website or some place like that as I remember seeing it elsewhere. It was a working amp and can see easily what they done. Only thing thou; /archives//html/Amps/2006-01/msg00749.html (13,360 bytes)
3. Re: [Amps] [BULK]Re: [BULK]Re: cathode to ground in tetrode amp (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Mon, 30 Jan 2006 21:27:33 -0500; The 22 uH and 1000 pF in the grid peaks at 1 MHz and rolls off at 12 dB per octave after that. Can anyone tell me why they put a 12K resistor from screen to ground? Its on the load side of the screen; /archives//html/Amps/2006-01/msg00750.html (10,030 bytes)

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