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24th May 2012, 07:38 PM
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#11 |
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diyAudio Member
Join Date: May 2010
Location: Washington State
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Did you get a chance to read my last post with the values I posted Perry?
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Pyramid 52 Amp Power Supply----Fluke 787 Processmeter----Tektronix 465 Scope----Velleman HPS40 Scope----Soldering Iron----Desoldering Iron----Hejet HJ 500-S Heatgun----DM4070 Digital LCR Meter----Propane Torch |
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24th May 2012, 07:53 PM
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#12 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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I didn't see it earlier.
You can't use the negative speaker terminal. Use the amplifier's ground terminal or one of the non-bridging speaker terminals for the reference (black probe).
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24th May 2012, 08:00 PM
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#13 |
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diyAudio Member
Join Date: May 2010
Location: Washington State
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Ok I will re-check. In post number 9 you requested that I use the negative speaker terminal for testing, you must have meant the non bridging terminal.
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Pyramid 52 Amp Power Supply----Fluke 787 Processmeter----Tektronix 465 Scope----Velleman HPS40 Scope----Soldering Iron----Desoldering Iron----Hejet HJ 500-S Heatgun----DM4070 Digital LCR Meter----Propane Torch |
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24th May 2012, 08:07 PM
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#14 |
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diyAudio Member
Join Date: May 2010
Location: Washington State
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C312: 0.656
C312: -0.986 C314: -1.004 C314: 0.654
__________________
Pyramid 52 Amp Power Supply----Fluke 787 Processmeter----Tektronix 465 Scope----Velleman HPS40 Scope----Soldering Iron----Desoldering Iron----Hejet HJ 500-S Heatgun----DM4070 Digital LCR Meter----Propane Torch |
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24th May 2012, 09:26 PM
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#15 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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You'll need to connect the RCA shield ground to the primary ground.
The next time you post the voltages, make a note of which terminal of the capacitors to the 3.32k resistors.
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25th May 2012, 12:56 AM
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#16 |
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diyAudio Member
Join Date: May 2010
Location: Washington State
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So I can un a jumper from the rca shield to the amps main ground terminal?
__________________
Pyramid 52 Amp Power Supply----Fluke 787 Processmeter----Tektronix 465 Scope----Velleman HPS40 Scope----Soldering Iron----Desoldering Iron----Hejet HJ 500-S Heatgun----DM4070 Digital LCR Meter----Propane Torch |
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25th May 2012, 01:09 AM
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#17 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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Yes.
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31st May 2012, 07:05 AM
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#18 |
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diyAudio Member
Join Date: May 2010
Location: Washington State
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The negative terminal of C314 which goes to the 3.32k resistor
reads: -0.998 vdc The positive terminal of C314 reads: 0.654 vdc The negative terminal of C312 which goes to the 3.32k resitor reads: -0.998 vdc The positive terminal of C312 reads: 0.648 vdc
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Pyramid 52 Amp Power Supply----Fluke 787 Processmeter----Tektronix 465 Scope----Velleman HPS40 Scope----Soldering Iron----Desoldering Iron----Hejet HJ 500-S Heatgun----DM4070 Digital LCR Meter----Propane Torch |
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31st May 2012, 01:10 PM
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#19 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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What's the resistance between the base of Q301 and the base of Q302?
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31st May 2012, 07:21 PM
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#20 |
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diyAudio Member
Join Date: May 2010
Location: Washington State
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Resistance between base of Q301 and Q302 reads: 46.0 k ohms
Also as a side note I have -1.898 vdc on the drains of Q310 and Q311. Could they be leaky?
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