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24th September 2009, 03:11 AM
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#1 |
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diyAudio Member
Join Date: May 2008
Location: Deep in the Heart of North Jersey
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6X5GT PS Problem
I'm Building an Amp with a 6X5GT PS. It has 114v at Pins 3 & 5, which is Right, and it's a CLCRC Supply...But it has -.8v at Pin 8...I've tried 3 other Rectifiers, but they all show -.8v at Pin 8....Are my Pin-Outs Wrong??...The Heaters Glow, so at least they're Pinned Right???...
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24th September 2009, 03:33 AM
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#2 |
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diyAudio Member
Join Date: Sep 2006
Location: Mar del Plata, a BIG seasonal getaway city, can see the Ocean from our residence.
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We need a schematic as we don't know the specific amp you have built.
__________________________________________________ ___Rick.... |
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24th September 2009, 03:54 AM
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#3 | |
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diyAudio Member
Join Date: Mar 2007
Location: Auckland, NZ
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Quote:
__________________
Yes, conservatism thrives on low intelligence and poor information. But the liberals in politics... continue to back off, yielding to the supremacy of the stupid. It's turkeys all the way down. - George Monbiot, guardian.co.uk, 6 Feb 2012 |
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24th September 2009, 03:58 AM
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#4 |
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diyAudio Member
Join Date: Aug 2006
Location: Taxland, New Jersey
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Your pin outs are correct. Pin 8 is the cathode and you should have around +150VDC unloaded with respect to DC return/ground. Either all 3 tubes have an open cathode connection, which is unlikely, or your tube socket isn't making a connection at pin 8. Check that very carefully.
Is this a full wave with a center tapped transformer?
__________________
"The supercomputer is technologically impossible. It would take all of the water that flows over Niagara Falls to cool the heat generated by the number of vacuum tubes required." ~ Professor of Electrical Engineering, New York University Last edited by HollowState; 24th September 2009 at 04:03 AM. Reason: added question |
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24th September 2009, 04:09 AM
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#6 |
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diyAudio Member
Join Date: Mar 2007
Location: Auckland, NZ
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ok - so now you have a 0.8v drop (or difference) between the AC safety earth and the DC signal earth. Is there a resistor or diode in that path? Or have you direct-connected the two earths?
__________________
Yes, conservatism thrives on low intelligence and poor information. But the liberals in politics... continue to back off, yielding to the supremacy of the stupid. It's turkeys all the way down. - George Monbiot, guardian.co.uk, 6 Feb 2012 |
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24th September 2009, 04:12 AM
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#7 |
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diyAudio Member
Join Date: Mar 2007
Location: Auckland, NZ
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oops -
 . What hollowstate said...
__________________
Yes, conservatism thrives on low intelligence and poor information. But the liberals in politics... continue to back off, yielding to the supremacy of the stupid. It's turkeys all the way down. - George Monbiot, guardian.co.uk, 6 Feb 2012 |
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24th September 2009, 04:19 AM
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#8 |
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diyAudio Member
Join Date: Mar 2007
Location: Auckland, NZ
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would a dead short to earth on Pin 8 do this too? ie load the rectifier so that voltage was pulled close to zero?
__________________
Yes, conservatism thrives on low intelligence and poor information. But the liberals in politics... continue to back off, yielding to the supremacy of the stupid. It's turkeys all the way down. - George Monbiot, guardian.co.uk, 6 Feb 2012 |
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24th September 2009, 04:27 AM
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#9 |
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diyAudio Member
Join Date: May 2008
Location: Deep in the Heart of North Jersey
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Oh Well, Live and Learn...It would seem that I've totally Screwed the Poodle on this project...I tried to do the Back to Back 12.6v CT RS Transformer Trick..But I only have 114v between Pins 3 & 5.....Nothing between either of those and Ground...It really looks Nice & Glows Pretty though...
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