News: Trouble logging in? Log in from the login page.
May 31, 2020, 07:22:45 AM

Author Topic: DC Filament Question [resolved]  (Read 137 times)

0 Members and 1 Guest are viewing this topic.

Online oguinn

  • Sr. Member
  • ****
  • Posts: 600
    • DIY Audio Gallery
DC Filament Question [resolved]
« on: May 15, 2020, 01:53:24 PM »
Is 5.6V ok to get on the 300Bs during the test? I assume so but it is outside of the range but a little over 10% so thought I’d ask
« Last Edit: May 16, 2020, 09:27:59 AM by Paul Birkeland »
Jameson O’Guinn

-

Main System: Schiit Bifrost MB, Schiit Sol, Eros 2, BeePre, Kaiju/Stereomour II, Jägers

Desktop System: Crack with Speedball

Offline Paul Birkeland

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 12819
Re: DC Filament Question
« Reply #1 on: May 16, 2020, 04:41:48 AM »
This is 5.6V at pins 1/4 on the socket itself?  Are you using the 0.51 ohm resistors?  Pics of the install?
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Online oguinn

  • Sr. Member
  • ****
  • Posts: 600
    • DIY Audio Gallery
Re: DC Filament Question
« Reply #2 on: May 16, 2020, 04:47:46 AM »
It is on pins 1/4 on both the A and C side. I’ll post pictures in a bit. I don’t have the instructions in front of me, but I did use all available resistors from the kit.
Jameson O’Guinn

-

Main System: Schiit Bifrost MB, Schiit Sol, Eros 2, BeePre, Kaiju/Stereomour II, Jägers

Desktop System: Crack with Speedball

Offline Paul Birkeland

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 12819
Re: DC Filament Question
« Reply #3 on: May 16, 2020, 05:02:12 AM »
Also, does your meter have a 20V range?  On a DC range like 600V, seeing 5.6V wouldn't be that surprising.
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Online oguinn

  • Sr. Member
  • ****
  • Posts: 600
    • DIY Audio Gallery
Re: DC Filament Question
« Reply #4 on: May 16, 2020, 05:05:32 AM »
It auto ranges. Should I try to force it into the 20V range?
Jameson O’Guinn

-

Main System: Schiit Bifrost MB, Schiit Sol, Eros 2, BeePre, Kaiju/Stereomour II, Jägers

Desktop System: Crack with Speedball

Offline Paul Birkeland

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 12819
Re: DC Filament Question
« Reply #5 on: May 16, 2020, 05:08:07 AM »
No, any autoranging meter should resolve 5V just fine.  What voltage do you get on the terminal strips where the DC output of the regulator board lands?
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Online oguinn

  • Sr. Member
  • ****
  • Posts: 600
    • DIY Audio Gallery
Re: DC Filament Question
« Reply #6 on: May 16, 2020, 05:21:25 AM »
B tube
Jameson O’Guinn

-

Main System: Schiit Bifrost MB, Schiit Sol, Eros 2, BeePre, Kaiju/Stereomour II, Jägers

Desktop System: Crack with Speedball

Online oguinn

  • Sr. Member
  • ****
  • Posts: 600
    • DIY Audio Gallery
Re: DC Filament Question
« Reply #7 on: May 16, 2020, 05:21:57 AM »
C tube
Jameson O’Guinn

-

Main System: Schiit Bifrost MB, Schiit Sol, Eros 2, BeePre, Kaiju/Stereomour II, Jägers

Desktop System: Crack with Speedball

Online oguinn

  • Sr. Member
  • ****
  • Posts: 600
    • DIY Audio Gallery
Re: DC Filament Question
« Reply #8 on: May 16, 2020, 05:22:53 AM »
DC board
Jameson O’Guinn

-

Main System: Schiit Bifrost MB, Schiit Sol, Eros 2, BeePre, Kaiju/Stereomour II, Jägers

Desktop System: Crack with Speedball

Offline Paul Birkeland

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 12819
Re: DC Filament Question
« Reply #9 on: May 16, 2020, 05:26:26 AM »
You have not properly installed the board.
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Online oguinn

  • Sr. Member
  • ****
  • Posts: 600
    • DIY Audio Gallery
Re: DC Filament Question
« Reply #10 on: May 16, 2020, 05:31:28 AM »
You know, I went over those instructions about a thousand times and still managed to get that final step wrong.

Please forget this happened. I won’t, but you can.
Jameson O’Guinn

-

Main System: Schiit Bifrost MB, Schiit Sol, Eros 2, BeePre, Kaiju/Stereomour II, Jägers

Desktop System: Crack with Speedball

Online oguinn

  • Sr. Member
  • ****
  • Posts: 600
    • DIY Audio Gallery
Re: DC Filament Question
« Reply #11 on: May 16, 2020, 05:33:54 AM »
For whatever reason AC In and DC out made a bunch of sense. AND I only had one IPA while doing it. Embarrassing.
Jameson O’Guinn

-

Main System: Schiit Bifrost MB, Schiit Sol, Eros 2, BeePre, Kaiju/Stereomour II, Jägers

Desktop System: Crack with Speedball

Offline Paul Birkeland

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 12819
Re: DC Filament Question
« Reply #12 on: May 16, 2020, 06:11:59 AM »
I mean, if you've put that same board into a Stereomour, I could easily see how this would happen.

-PB
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Online oguinn

  • Sr. Member
  • ****
  • Posts: 600
    • DIY Audio Gallery
Re: DC Filament Question
« Reply #13 on: May 16, 2020, 06:28:53 AM »
Hokay. With the error fixed I’m within the right range on both tubes. I’ll let the caps discharge and go do some chores then see how it sounds.

Thanks for the eagle eye, as always
Jameson O’Guinn

-

Main System: Schiit Bifrost MB, Schiit Sol, Eros 2, BeePre, Kaiju/Stereomour II, Jägers

Desktop System: Crack with Speedball

Online oguinn

  • Sr. Member
  • ****
  • Posts: 600
    • DIY Audio Gallery
Re: DC Filament Question
« Reply #14 on: May 16, 2020, 07:09:11 AM »
Hot damn, that works really nicely. By far the most noticeable upgrade I’ve done.
Jameson O’Guinn

-

Main System: Schiit Bifrost MB, Schiit Sol, Eros 2, BeePre, Kaiju/Stereomour II, Jägers

Desktop System: Crack with Speedball