Output tube stage 1578 for no DAC

[merlin el mago]

Can I use the attached tube 1578 output stage for "The best DAC is no DAC" DSD low pass filter (Rf & Cf)

http://www.diyaudio.com/forums/digital-line-level/273474-best-dac-no-dac-117.html#post4663002

 

[merlin el mago]

Please Mods change the thread name: OUTPUT TUBE "STAGE" 1578 FOR NO DAC.

TIA
Felipe

 

[merlin el mago]

Someone knows the output impedance?

 

[shadowlight]

Felipe,

Did you build the output tube stage with NO DAC?

 

[merlin el mago]

Still not, I have problems to install WaveIO drivers and I'm waiting the repaired Amanero that surely arrives next week.

 

[DF96]

Someone knows the output impedance?

[ra + (mu+1)Rk] || RA

 

[disco]

6-7K or something close.

 

[merlin el mago]

Thanks guys.

[10.000R + (20+1) x 820R ] // 10.000R = 72.312R

 

[disco]

eu-urh... first you solve thingy inbetween brackets (17K22), then add 10K => 27K22 and then parallel to 10K. So, 7K3

 

[merlin el mago]

[10.000R + (20+1) x 820R ] // 10.000R = 72.312R

21 x 820R = 17.220R

(10.000R + 17.220R) // 10.000R = 72.312R

 

[disco]

An externally hosted image should be here but it was not working when we last tested it.

 

[DF96]

[10.000R + (20+1) x 820R ] // 10.000R = 72.312R

[ra + (mu+1)Rk] || RA

Can you see the difference?

|| not //

|| means parallel, so x||y = xy/(x+y)

 

[merlin el mago]

Can you see the difference?

|| not //

|| means parallel, so x||y = xy/(x+y)

Yes thanks for help.