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Re: 300B cascode + grid choke Spice simulation [message #31560 is a reply to message #31557]

Sun, 04 December 2005 13:17

Damir
Messages: 1005
Registered: May 2009

Illuminati (2nd Degree)

Of course, this is the example of possible LF and HF driver "problems" when we can "blindly" put a grid-choke in existing circuit, without optimisation. OPT here is just a simbol, I use a similar circuit for OPT (with added leakage inductance).
I`m aware about resonances, and Q=[(L/C)^0,5]/Rw - with "real" components it`s not easy to get Q=0,5, or critical damping, and some designing compromises are in order. Little boost on 10Hz probably isn`t tragic, no NFB, and output stage is already "down" here. "Over all" frequency response simulation shows little "hump" in subsonic area, but simple anlarging of Ci can handle it, and I like it more that way :-).
Cascode driver (few versions) is a just one option, I`ll try some others, too. After "technical" optimisation, the listening test will be crucial:-).
Thanks for comments and suggestions, and thanks for link - good summary :-).

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[Message index]

		The shunt capacitance of grid and anode chokes By: Damir on Fri, 02 December 2005 06:37
		Re: The shunt capacitance of grid and anode chokes By: PakProtector on Fri, 02 December 2005 14:29
		Re: The shunt capacitance of grid and anode chokes By: Damir on Sat, 03 December 2005 06:17
		Re: The shunt capacitance of grid and anode chokes By: Manualblock on Sat, 03 December 2005 06:43
		Re: The shunt capacitance of grid and anode chokes By: PakProtector on Sat, 03 December 2005 09:38
		Re: The shunt capacitance of grid and anode chokes By: Manualblock on Sat, 03 December 2005 13:33
		Re: The shunt capacitance of grid and anode chokes By: Damir on Sat, 03 December 2005 13:50
		a much more succint explanation than mine :=)) By: MQracing on Sat, 03 December 2005 14:16
		this makes an interesting assumption... By: PakProtector on Sat, 03 December 2005 15:27
		Re: this makes an interesting assumption... By: Manualblock on Sat, 03 December 2005 19:44
		I think I can guess the origin of that quote.... By: MQracing on Sat, 03 December 2005 22:12
		Re: I think I can guess the origin of that quote.... By: Manualblock on Sun, 04 December 2005 07:15
		Re: I think I can guess the origin of that quote.... By: Damir on Mon, 05 December 2005 11:50
		oscillation By: PakProtector on Wed, 07 December 2005 16:31
		Re: this makes an interesting assumption... By: PakProtector on Sun, 04 December 2005 04:57
		Re: The shunt capacitance of grid and anode chokes By: MQracing on Sat, 03 December 2005 14:13
		Re: The shunt capacitance of grid and anode chokes By: Manualblock on Sat, 03 December 2005 19:38
		Re: The shunt capacitance of grid and anode chokes By: MQracing on Sat, 03 December 2005 22:25
		perhaps this will be more intuitve... By: MQracing on Sat, 03 December 2005 14:59
		Re: perhaps this will be more intuitve... By: Manualblock on Sat, 03 December 2005 19:36
		Re: perhaps this will be more intuitve... By: MQracing on Sat, 03 December 2005 22:19
		Re: The shunt capacitance of grid and anode chokes By: MQracing on Sat, 03 December 2005 08:55
		Re: The shunt capacitance of grid and anode chokes By: Damir on Sat, 03 December 2005 12:00
		Re: The shunt capacitance of grid and anode chokes By: MQracing on Sat, 03 December 2005 12:14
		Re: The shunt capacitance of grid and anode chokes By: Damir on Sat, 03 December 2005 13:34
		Re: The shunt capacitance of grid and anode chokes By: MQracing on Sat, 03 December 2005 13:56
		Re: The shunt capacitance of grid and anode chokes By: PakProtector on Sat, 03 December 2005 15:43
		which is to say.. By: PakProtector on Sat, 03 December 2005 16:03
		Re: which is to say.. By: Damir on Sun, 04 December 2005 09:57
		Re: which is to say.. By: MQracing on Sun, 04 December 2005 10:12
		Re: which is to say.. By: PakProtector on Sun, 04 December 2005 11:09
		Re: The shunt capacitance of grid and anode chokes By: MQracing on Sun, 04 December 2005 07:53
		300B cascode + grid choke Spice simulation By: Damir on Sun, 04 December 2005 09:36
		Re: 300B cascode + grid choke Spice simulation By: MQracing on Sun, 04 December 2005 10:52
		Re: 300B cascode + grid choke Spice simulation By: Damir on Sun, 04 December 2005 13:17
		good dialogue By: MQracing on Sun, 04 December 2005 19:13
		Re: good dialogue By: Damir on Mon, 05 December 2005 04:26
		One more thing... By: PakProtector on Tue, 06 December 2005 18:04
		Re: One more thing... By: Damir on Tue, 06 December 2005 23:23
		gapping zeroe DC inductors By: PakProtector on Wed, 07 December 2005 04:05
		Re: The shunt capacitance of grid and anode chokes By: MQracing on Sun, 04 December 2005 07:53
		Re: The shunt capacitance of grid and anode chokes By: MQracing on Sun, 04 December 2005 07:53
		Re: The shunt capacitance of grid and anode chokes By: MQracing on Sun, 04 December 2005 07:53
		Re: The shunt capacitance of grid and anode chokes By: MQracing on Sun, 04 December 2005 07:53
		Re: The shunt capacitance of grid and anode chokes By: MQracing on Sun, 04 December 2005 07:53
		Re: The shunt capacitance of grid and anode chokes By: MQracing on Sun, 04 December 2005 07:53
		Re: The shunt capacitance of grid and anode chokes By: MQracing on Sun, 04 December 2005 07:53
		Re: The shunt capacitance of grid and anode chokes By: MQracing on Sun, 04 December 2005 07:53

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