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In the Forum: Melquiades Amplifier
In the Thread: Single-stage Melquiades vs. DHT amps
Post Subject: Gain is not power.Posted by Romy the Cat on: 2/14/2009
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 drdna wrote:
So it would require a new OPT to be made with around 3.5-4K primary impedance. The power the amplifier puts out is already far too much. I always have the volume dial around 1-2, so this will be okay. I don't have such an OPT on hand so I will need to buy one...
Adrian, what you report that your amp “puts out already far too much” is gain not power. You have two driver stages each of them 20 times gain, so you have too much gain, not power. BTW, if I were you I would get rid one stage as it is absolutely not necessary in this design. I do not like high-gain 2A3 –who heed high gain if it is not supported by sufficient power? I did have 2 stages, one stage, one parallel 2A3 and one 6E5P (which is 30 times gain with one stage). I do not like too much gain for given power as it driver the power tube deeper to A2 – way would we want it? BTW, when you go from the “standard” 2.5K load to 4.2K you will lose some gain.

The Cat

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