chetlanin
Head-Fier
- Joined
- Oct 4, 2011
- Posts
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- 14
Difficult to go further about the transformer, miky. Personally I do not believe that it is the way to go to improve the amp, as I said.
Listen, why copy the Lehmann? Funny idea, but you can make this amp much, much better than the Lehmann by concentrating on a few important things, the weak spots so to speak, rather than changing resistor types and capacitors which are highly unlikely to make any significant difference. First: You can simply put in a better op-amp, and it is highly likely that you already have surpassed the Lehmann, sonically speaking. Second: You must concentrate on the the non-linear components, and that means the transistors. The Chinese stuff (and the recently made Western stuff in general) is not considered the best. Find the best of the older types you can (for example old stock Philips or Siemens made in Europe in the second half of the last century). If necessary pull it from old equipment. Match the transistors in pairs before soldering it into the amp. That is all, in my opinion. No wait, I would add a couple of minor mods which to me has some meaning: Find the right setting of the sensitivity switch and solder the resistor(s) in place. In addition -and here I am w Lehmann - solder the chosen opamp into the board. Really secure connections are of great importance, esp in the long run. Olaf
Listen, why copy the Lehmann? Funny idea, but you can make this amp much, much better than the Lehmann by concentrating on a few important things, the weak spots so to speak, rather than changing resistor types and capacitors which are highly unlikely to make any significant difference. First: You can simply put in a better op-amp, and it is highly likely that you already have surpassed the Lehmann, sonically speaking. Second: You must concentrate on the the non-linear components, and that means the transistors. The Chinese stuff (and the recently made Western stuff in general) is not considered the best. Find the best of the older types you can (for example old stock Philips or Siemens made in Europe in the second half of the last century). If necessary pull it from old equipment. Match the transistors in pairs before soldering it into the amp. That is all, in my opinion. No wait, I would add a couple of minor mods which to me has some meaning: Find the right setting of the sensitivity switch and solder the resistor(s) in place. In addition -and here I am w Lehmann - solder the chosen opamp into the board. Really secure connections are of great importance, esp in the long run. Olaf