LF411 is an option too. Costs around 1,-€. Even a TL071 does the job. Peter, the INA217
was part of a circuit i published. Public demand drove it away to the Paradise though.
was part of a circuit i published. Public demand drove it away to the Paradise though.
Peter, bring the INA217 to the mini Frickelfest and i compensate you with the same value.
For example 2 x OPA134 plus something else. Panasonic elcaps ?
For example 2 x OPA134 plus something else. Panasonic elcaps ?
A socket is OK for the servo. The way Michael implemented it, it is not direct in the signal path. D.Self recommends sockets in general. Makes repair more easy and you can experiment with various options. When Holger and Christian visited me i played them a stage that had 16 Opamps on sockets. That does not prove that this is not audible but the difference is not night and day in my experience. Make sure you use good ones with gold plated precision contacts. I have customers that even prefer sockets to be more flexible.
@JG,
you don't have to compensate anything, at least for me.
But i bring 'em on, anyway.
@.:HB:.,
is there anything special ? 😀
you don't have to compensate anything, at least for me.
But i bring 'em on, anyway.
@.:HB:.,
is there anything special ? 😀
The servo works by injecting currents in the lower and upper parts of the circuit, the current running in the mirror legs is app 12 mA, and the current-adjustments injected by the servo is in the uA range, because of the high DC gain in the mirrors (not in signal circuit). so it does not pull the circuit off-balance.
The servo is also extremely isolated from the circuit...and frankly it's a bit of a marvel. Firstly it operates only below 0.5 Hz, and then it's shielded and isolated behind high impedance mirrors. thus reducing signal bleed to.....(very very little)
The servo is also extremely isolated from the circuit...and frankly it's a bit of a marvel. Firstly it operates only below 0.5 Hz, and then it's shielded and isolated behind high impedance mirrors. thus reducing signal bleed to.....(very very little)
Thanks for explaining this in more detail. Friends, all our co. designers are audio freaks and we have really turned all the stones here. If this stage does not sound good i quit my job and sell ice cream in Rio.
Yes- we thought of this a lot!
Think of it :
Joachim does the IceCream
I will contribute german Currywurst
and whoever wants to join can come and add something
Yep!
And we build the Lighthouse Turntable on the coast of Rio.
A weight that is in a controlled mechanism pulled down to the coast ( a few hundred meters) and spins a platter and we listen to brazilian Samba whilst building it ( life musicians there!) and to our records in the lighthouse when the Samba players need a rest
Holger if you also have a plan C - we work on the lighthouse mechanism...
and again
IceCream
Currywurst
and
DRINKS!!!!
And we build the Lighthouse Turntable on the coast of Rio.
A weight that is in a controlled mechanism pulled down to the coast ( a few hundred meters) and spins a platter and we listen to brazilian Samba whilst building it ( life musicians there!) and to our records in the lighthouse when the Samba players need a rest
Holger if you also have a plan C - we work on the lighthouse mechanism...
and again
IceCream
Currywurst
and
DRINKS!!!!
Oh
and i forgoy Jacco
we need your "maritime" expertise there
... its alway good to have a sailor on board!!!
and i forgoy Jacco
we need your "maritime" expertise there
... its alway good to have a sailor on board!!!
Now that Legendary Martina is involved poor chance of that.
What kind of punishment is to go to Rio anyway?
Try and came over here and sell ICE cream in the rain...
Somebody (mate of yours?) already doing that and will get realy upset if you even think about it.
IMO Apart from jokes I think you are doing a realy good job especialy if you consider that newbies like me are realy interested in this tread and most of all
I do not feel like I am going to get my head bitten off at the smalest chance.
As Riccardo sayd earlier on it is an honor to be here