Intact Audio

For some reason I thought that using CCS with high voltage is more complicated.. Larger heatsink will do all job. ;-). Once again thank you Lars for clarifying things. One more question. I would like to try "Triode Trick" http://www.t-linespeakers.org/tubes/triode-trick.html. I'm having pr...

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At first I thought that you suggested to drop 200V on cathode resisistor to keep anode-kathode voltage at 100V , and that was odd to me..
That is why i decided to ask
Now every thing is clear. Today I'm going to test that..
Thanks Lars..

I'm afraid that your sugestion is not obvious for me, sorry for being knowledge resistant . Could you calculate value of Rk for given input parameters ?
Lest say (for easy calculations) that we have:

Ia=10mA,
Ug=-2V,
Ua=100V

and B+ is 300V

Regards,
Artur

Hey Oko, How could you use something like SRPP? In my point view this is awful compared to a well designed SE. IF you want to have low Zout the only thing you can do this to use a HighGm device on top of the triode in SRPP-style. It´s easy done with a depletion MOSFET like DN2540. This sounds OK! ...

Hi Lars,
Thank you for your comments.
All my issues were caused by strange connection of 6n6p (I connected both halfs triodes in PSE) and operating point. I've change setup for SRPP and all issues are gone.

12B4 is bitch to work with, because easy oscillate or simple injecting hiss to circuit. I'm using two 1kR resistors edirectly soldered do socket legs for each grid pins. And this keep me away from tube oscillations. I'm using this tube at list two years in different configurations so I think I know ...

Hi, So seems that posted circuit is 100% correct and I should have no issues with driving from that setup integrated amp with 100kR input impedance ? Am asking that because, this setup cusses serious distortions even at very low volume ;-(. At firs i thought that my problems are connected with not a...

Hi Dave,
Thank you for very fast answer..

Another question, transformer secondaries have low DCR, and relativly small inductance, can I add resistor in series or paraller with secondary to stabilize tube grid ?

Regards,
Artur

Hi Dave, I got from you transformer 1:1 (custom made for Wolfson) for converting symetric sygnal to single ended. Could you explain to me what impednace DAC sees if im using this transformer and tube stage ? I'm sorry for perhaps stupid question but I'm novice in this matter. As far as I techanical ...

Hi Lars, Thank you for suggestion but I’m not sure what do you man saying compensate voltage. Should I increase cathode resistor to set grid voltage to 13V (11V + 2V) or should I decrease cathode resistor to set grid voltage to 9 V (11V - 2V). Sorry for such dump question but as mentioned in first p...

Hi Dave, Thank you for answer. Yes, I'm using only SE signal. The next thing what I'm going to do is use transformer for conversion balanced signal to SE. But this is another story and I will have some questions to you since I would like to order proper transformers. But at this moment have to stay ...

Hello, I would like to ask someone more experienced than me to have a look at attached schematics and ask if this circuit makes any sense. Basically I’m using this line preamp with my Cambrige Audio Azur CD 640C. Because I could not find Wolfson DAC in Eagle library for drawing schematics I used ran...