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2359glenn | studio
Oct 20, 2017 at 3:27 PM Post #16,216 of 39,986
Ah ha so Ragnarok can be used as a preamp? That's what I would probably be doing. Although that would be a pretty expensive preamp... :ksc75smile:

In my study now, there's Yggdrasil and Ragnarok. Ulysses will be joining them in due time.

Wow Yggdrasil, Ragnarok and Ulysses. That's some vintage and ancient names. I could rewrite the classics here. :ksc75smile:
 
Oct 20, 2017 at 3:42 PM Post #16,217 of 39,986
Just read Ragnarok user manual. It can indeed be used as a preamp with both balanced and single ended preamp outs. This seems like a multi function box. It can do everything.

Ok there's a catch. The preamp outs are disabled in headphone-only mode. Have to switch to headphone and speaker mode.
 
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Oct 20, 2017 at 6:02 PM Post #16,218 of 39,986
After viewing all the tube porn here recently, I realized that I hadn't posted any in awhile! lol :)

2017-09-11 11.07.17.jpg
 
Oct 20, 2017 at 6:14 PM Post #16,220 of 39,986
lukeap69 said:
:beerchug:

I am not sure how similar your amp will be with my Darna. With C3gs as drivers and 6BL7s as power, the gain is very high. Just on the 2nd click of my 24 step attenuator, my HD800 were so loud already. In the end I had to add a passive preamp to reduce the volume. I mentioned this so you will be prepared when you receive your Ulysses.
Click to expand...

You should try 6BX7s they have lower gain then the 6BL7s
6BL7 gain 15
6BX7 gain 10
 
Oct 20, 2017 at 6:43 PM Post #16,221 of 39,986
lukeap69 said:
:beerchug:

I am not sure how similar your amp will be with my Darna. With C3gs as drivers and 6BL7s as power, the gain is very high. Just on the 2nd click of my 24 step attenuator, my HD800 were so loud already. In the end I had to add a passive preamp to reduce the volume. I mentioned this so you will be prepared when you receive your Ulysses.
Click to expand...

Yes, I remember you mentioned this. That is not the case with my new GOTL 3X6/Lundhal.
I'm using a GungnirMB DAC which has single ended output of 2V RMS. I also do not have a stepped attenuator.
Either or both of those could be a factor.
Been a little while since I had the 6BL7s in the amp, but I could check again.
My recollection is that the volume range was fine with all the driver/output combinations I've used.
(Have used the C3gs with all the power tubes I have.)
 
Oct 20, 2017 at 8:54 PM Post #16,222 of 39,986
rnros said:
Yes, I remember you mentioned this. That is not the case with my new GOTL 3X6/Lundhal.
I'm using a GungnirMB DAC which has single ended output of 2V RMS. I also do not have a stepped attenuator.
Either or both of those could be a factor.
Been a little while since I had the 6BL7s in the amp, but I could check again.
My recollection is that the volume range was fine with all the driver/output combinations I've used.
(Have used the C3gs with all the power tubes I have.)
Click to expand...

Some DAC's output more then 2 volts. Even though that supposed to be the standard output voltage.
 
Oct 21, 2017 at 12:02 AM Post #16,225 of 39,986
UntilThen said:
Just read Ragnarok user manual. It can indeed be used as a preamp with both balanced and single ended preamp outs. This seems like a multi function box. It can do everything.

Ok there's a catch. The preamp outs are disabled in headphone-only mode. Have to switch to headphone and speaker mode.
Click to expand...

There are three modes for the Rok, one is both headphones and speakers out are on, two is headphones only, and three is speakers only IIRC. You can cycle by holding down the input switch.
 
Oct 21, 2017 at 12:05 AM Post #16,226 of 39,986
2359glenn said:
You should try 6BX7s they have lower gain then the 6BL7s
6BL7 gain 15
6BX7 gain 10
Click to expand...

Indeed. I have been using mostly 6BX7s instead of 6BL7s and I had actually collected 3-sixtets 6BX7s. :)
However even with 6BX7s the gain is still high so I still had to use a preamp even with 6BX7s.
 
Oct 21, 2017 at 12:06 AM Post #16,227 of 39,986
rnros said:
Yes, I remember you mentioned this. That is not the case with my new GOTL 3X6/Lundhal.
I'm using a GungnirMB DAC which has single ended output of 2V RMS. I also do not have a stepped attenuator.
Either or both of those could be a factor.
Been a little while since I had the 6BL7s in the amp, but I could check again.
My recollection is that the volume range was fine with all the driver/output combinations I've used.
(Have used the C3gs with all the power tubes I have.)
Click to expand...
That's good then. I will be interested to know Matt's findings when the Ulysses found its way home. :)
 
Oct 21, 2017 at 12:08 AM Post #16,228 of 39,986
2359glenn said:
Some DAC's output more then 2 volts. Even though that supposed to be the standard output voltage.
Click to expand...
That's true Glenn. My Holo Spring DAC has higher output than my Audio-GD DACs and ARES. But even with the 'standard' output DACs the gain is still high but more manageable.
 
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