bababouy
Member
Hi, just finished my first BT50. I'm not getting any output, bypass on and off.
I did verify the opamps (CA-0252) work on a separate preamp.
I did verify the opamps (CA-0252) work on a separate preamp.
Are those voltages AC? They look WAY off.Recleaned the bottom of the board, and double checked for any solder bridges.
Sent a tone generator to the EQ (400 hz, -14 dBFS), EQ bypassed. The output is very low, just above the noise floor.
Test Point Results:
TP1: 0.0 V
TP2: 0.1 V
TP3: 0.1 V
TP4: 0.1 V
TP5: 0.1 V
TP6: 7.0 V
TP7: 27.6 V
TP8: 22.5 V
TP9: 3.2 V
TP10: 1.1 V
TP11: 1.4 V
TP12: 1.7 V
Yes, AC voltage. I thought it was way off as well, so I remeasured ( I had the leads reversed). Still rather low.Are those voltages AC? They look WAY off.
Here’s an example of voltages from a working unit that someone posted earlier:
TP1: 0.311V
TP2: 0.311V
TP3: 0.311V
TP4: 0.306V
TP5: 0.306V
TP6: 0.304V
TP7: 0.303V
TP8: 0.299V
TP9: 0.459V
TP10: 0.300V
TP11: 0.298V
TP12: 0.300V
This is pretty typical. You should at least have 0.3ish VAC at TP1.
If you have a piece of gear with transformer output, place it before the EQ and see if it makes a difference.The Cranborne 500R8 in this case is the converter AND the rack. Curious if anyone has gotten the 500R8 to work with this EQ.
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