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Old 19th February 2013, 03:44 PM   #2531
stajo is offline stajo  Sweden
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I dont have any specific schematic. I have a breadboard somewhere with some 3-4 A 200ish mH chokes for the katodes, just to see if I can build something that matches Rods optimum sand-stuff. 1660 PP was thought for the anodes and I usually start with conventional stuff before I implement the special made goodies. Just to learn the difference and hear the eventual improvement. Otherwise its as most on this thread. 5-6 mA on the curve, I dont remember the voltage.

/Staffan
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Old 20th February 2013, 08:48 PM   #2532
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Quote:
Originally Posted by rclourenco View Post
Running at 600mA each, I had the sinks, they fitted the board, and both Supertex and IRF devices are attached to it. Nevertheless it runs completely over specs and almost cold!
Obviously it's 60mA and not 600!!!
Sorry for the wrong information.
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Old 20th February 2013, 08:49 PM   #2533
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Still 60mA it's a lot of current for 26.
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Old 20th February 2013, 08:54 PM   #2534
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Originally Posted by merlin el mago View Post
Still 60mA it's a lot of current for 26.
Don't forget I have another CCS in front of Salas regulator, plus VR tubes, the tube is running at 4,5mA.
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Old 20th February 2013, 08:56 PM   #2535
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But you are using only or Salas or CCS+VR, only one, not?
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Old 20th February 2013, 08:59 PM   #2536
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Originally Posted by merlin el mago View Post
But you are using only or Salas or CCS+VR, only one, not?
No, Salas + CCS + VR.
I had both, and I don't see any harm on it, and the VR tubes look wonderfull.

See Ale's schematic on his blog, #26, version 2.
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Old 20th February 2013, 09:10 PM   #2537
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I have seen the Ale's blog and now already know what do you do.
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Old 21st February 2013, 05:34 AM   #2538
vgeorge is online now vgeorge  Greece
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Quote:
Originally Posted by rclourenco View Post
No, Salas + CCS + VR.
I had both, and I don't see any harm on it, and the VR tubes look wonderfull.

See Ale's schematic on his blog, #26, version 2.
I would recomend sometime to bypass the VR tubes and try the salas regulator directly on the load. Maybe you like it netter like this, or not. It' s going to be an interesting test anyway!
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Old 1st March 2013, 03:12 PM   #2539
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hi, i have a dac with an output cap ( 2,6V offset)can i use it with the 26 preamp in direct coupling mode just putting a bigger filament bias resistor to have 10V between grid and cathode?

thanks
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Old 1st March 2013, 03:18 PM   #2540
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Yes you can do that to compensate for the offset.

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