azazello wrote:
sampleaccurate wrote:
azazello wrote:
divide aprox. 120 to p.e. 0,6 - 1 v
output signal from CD that will give
p.e.? (Professional Engineer? - yes, I am registered in the state of Nevada as a P.E.)
CD? (compact disc?) - I prefer SACD
Could you write the words out? I don't understand your abbreviations.
Sorry....p.e. = par example - Fr. /I'm registered D.E. in Moscow University MIIT-1977/
CD = player /CD/ / I prefer only CD /
Thanks. Now I understand. But now I need to know what Fr. and D.E. stand for (France? D? Engineer?)
I'm not concerned with the gain of the SIPP. I'm willing to use a pre-tube stage circuit to boost the incoming signal by up to 20dB with an OPA134. That should allow a CD player to drive the amp to full power. Probably even an mp3 player. Plus I have a preamp if I need it. The bottom line is I can feed the amp as strong of a signal as it needs to reach full power and beyond. The OPA134 can provide up to 28 volts to the SIPP when used with a 30 volt supply.
All I need is a voltage gain of 8.5 in the SIPP to get 240 volts on the GM70 grid..
I have no problems with high quality op-amps designed specifically for audio used as preamps. In fact, I think they're better than tubes. I think it's the power stage that "makes" a tube amp. If there were an IC that had the same specs as the OPA134 but could output 240 volts I'd use it for a driver, but it doesn't exist!
SS ICs are only good for low level signals IMHO.
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