Having some trouble with the same amp as I have posted about previously.
Some background:
Purchased and assembled a pair of MK III's in March 2016. Purchased all of the available upgrades and octal boards
Had a grounding issue initially but with help all was well.
Developed a hum and had a fuse die awhile back. Replaced the fuse and the hum decreased to almost silent.
This week the hum is back so clearly there is an issue.
Was checking the bias tonight and one of the tube bias points would not give any voltage reading. The other was fine. Adjusted it just a bit and started some music.
The speaker connected to that amp was clearly not producing like it should. Low volume and very poor SQ. Shut down both amps and the preamp.
Went to a backup amp and it sucks compared to the MK III.
I'm hardly an electronics tech but I can follow directions. My expertise lies in other areas..
So at this point any advice on where to look for issues would be greatly appreciated.
I should add that the other MK III is still silent and performing very well.
Please, be gentle..... Assembling these amps was easy but not so much about diagnosing problems.
Well for me that is.
Some background:
Purchased and assembled a pair of MK III's in March 2016. Purchased all of the available upgrades and octal boards
Had a grounding issue initially but with help all was well.
Developed a hum and had a fuse die awhile back. Replaced the fuse and the hum decreased to almost silent.
This week the hum is back so clearly there is an issue.
Was checking the bias tonight and one of the tube bias points would not give any voltage reading. The other was fine. Adjusted it just a bit and started some music.
The speaker connected to that amp was clearly not producing like it should. Low volume and very poor SQ. Shut down both amps and the preamp.
Went to a backup amp and it sucks compared to the MK III.
I'm hardly an electronics tech but I can follow directions. My expertise lies in other areas..
So at this point any advice on where to look for issues would be greatly appreciated.
I should add that the other MK III is still silent and performing very well.
Please, be gentle..... Assembling these amps was easy but not so much about diagnosing problems.
Well for me that is.