m-45 power meter
- Thread starter Ndirish147
- Start date
I stuttered......
My Yamaha M-45 amplifier had the glue...:sigh:
Well. There you go. At least one M-45 had the glue.
Did you see the blackgate caps.:yes:
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Ndirish147
Member
I just ordered the new lights so once they come in I will look more closely for the glue. One thing i did notice was the meters seem to show an unbalanced output signal. Is there anyway to test this? I sent a mono signal to the amp but the left meter was still showing more output than the right channel.
Ndirish147
Member
First want to thank avionic for recommending dave at dgwojo excellent service ordered Sunday and got the lights Wednesday. Have a few more questions. Where do i adjust the dc offset? I checked the idle current and both channels are running at - 5mv pretty sure that is within spec? Other thing is i do have the glue on the board what is the best way to go about cleaning it? Thanks for all the help
Verify the your input attenuator controls are both set to the same level. Then follow the meter adjustment procedure in the service manual.
http://www.hifiengine.com/library/yamaha/m-45.shtml
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Yes , you need and True RMS AC voltmeter ( that's accurate at 1khz * ) and a 1khz audio signal source. (generator , etc.) No speaker load required.
* Some Flukes are. You will need to review your meter,s owners manual. I know " read the owners manual" WTF..
* Some Flukes are. You will need to review your meter,s owners manual. I know " read the owners manual" WTF..
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Ndirish147
Member
I gave up on the bias adjustment too my left is 24mv and the right is at 5mv so they arent bad i was just going to get them closer. If i pull the caps with glue on them out is it worth it to just replace them along with all of the other caps? I just have a cheap meter so i doubt it will do 1khz but i will check.
other than all of that the amp sounds very good, i am shocked at how clean and tight it is. looking forward to many years of use with it.
my left is 24mv and the right is at 5mv so they arent bad i was just going to get them closer. If i pull the caps with glue on them out is it worth it to just replace them along with all of the other caps? I just have a cheap meter so i doubt it will do 1khz but i will check. other than all of that the amp sounds very good, i am shocked at how clean and tight it is. looking forward to many years of use with it.
I gave up on the bias adjustment too
other than all of that the amp sounds very good, i am shocked at how clean and tight it is. looking forward to many years of use with it.
The left is going to run pretty hot at 24mv.
Grooverider
Active Member
My Yamaha M-45 amplifier had the glue...:sigh:
As did mine.
This thread showing the DSBG in a M-45 might help.
http://www.audiokarma.org/forums/showpost.php?p=5423046&postcount=11
