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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Mon Feb 07, 2011 8:27 am Post subject: BG808s Focus Voltage |
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Is there a focus voltage applied to Sony tubes in the bg808s? As you know there is a red focus wire from the G2&Focus board but the Barco graphics cross reference spreadsheets show no focus voltage. Surely the focus wire is not just for show?
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Ile
Joined: 09 Mar 2006
Posts: 1491
Location: Jyväskylä, Finland
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| Posted: Mon Feb 07, 2011 9:20 am Post subject: |
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Yes there is focus voltage applied.
I just plugged those connectors from g2 board when I swapped to MEC tubes. Also removed those red wires from neck cards.
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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Mon Feb 07, 2011 9:22 am Post subject: |
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| Ile wrote: | Yes there is focus voltage applied.
I just plugged those connectors from g2 board when I swapped to MEC tubes. Also removed those red wires from neck cards. |
Would you happen to know what that voltage is and why it is needed with EM tubes?
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Ile
Joined: 09 Mar 2006
Posts: 1491
Location: Jyväskylä, Finland
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| Posted: Mon Feb 07, 2011 11:49 am Post subject: |
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Don't know what voltage there is, but 15kV is coming from quad to that box and there is dropping resistor inside box before focus out connectors.
I think those Sony EM tubes also work without that voltage. If I remember correct Ampros didn't had that voltage applied.
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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Mon Feb 07, 2011 9:31 pm Post subject: |
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| Ile wrote: | Don't know what voltage there is, but 15kV is coming from quad to that box and there is dropping resistor inside box before focus out connectors.
I think those Sony EM tubes also work without that voltage. If I remember correct Ampros didn't had that voltage applied. |
So do Sony EM tubes have a focus gride like Sony ES tubes?
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