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Re: Unity Gain Preamp [message #9887 is a reply to message #9870]

Sat, 06 January 2007 19:03

PakProtector
Messages: 935
Registered: May 2009

Illuminati (2nd Degree)

Hey-Hey!!!,
While it doesn't look like anything's wrong, you should be able to do a whole lot better for a bit less. Go +120 and -25 for your supply. Rig a pentode as the cathode follower. 6EJ7 perhaps? 6AC7? 12HL7? Resistive drop for the g2 and cap bypass to the cathode. 2-4 uF should do it. Rig a CCS for the load, and cap couple the output. The tubes are cheap, and voltages will allow easy Schottky diode rectifiers.

you could buy it...but I suspect you'd rather listen to your own creation.
cheers,
Douglas

or look in the projects folder in GroupBuild, I put a schematic there for a buffer pre...:) TX coupled and no caps in the output. The Ni-cored output TX's are -1 dB at 2 MHz!

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[Message index]

		Unity Gain Preamp By: FredT on Sat, 16 December 2006 04:06
		Re: Unity Gain Preamp By: Wayne Parham on Sat, 16 December 2006 08:52
		Re: Unity Gain Preamp By: bretldwig on Tue, 26 December 2006 18:20
		Re: Unity Gain Preamp By: Wayne Parham on Wed, 27 December 2006 10:59
		Re: Unity Gain Preamp By: Forty2wo on Sun, 17 December 2006 20:34
		Re: Unity Gain Preamp By: PakProtector on Sat, 06 January 2007 19:03

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