Rick Lee
Well-known member
This is my fifth and final one. I don't know why I keep buying and flipping them, then missing them, then getting another, but this is it. It's a keeper.
I recall these all take a lot of dialing in, which I won't get to do before Sat. I worked from home today to wait for FedEx and they came at 6pm. Now I have to cook and then help Mrs. Lee with the car when she gets home. Tomorrow I'm working from home, but so it Mrs. Lee, so I'll be playing through my GK 250ML. As always, these come biased pretty cold from the factory. I bumped it up to 70% and will begin the preamp tube rolling on Sat. when I can pull the chassis and access those. If you have one of these, you know the power tubes make it very hard to reach the preamp tubes without pulling the chassis. No matter. I will run this at full tilt for hours on Sat.
For those who know how to bias these, I'm getting vastly different readings with the external bias points vs. my EuroTubes bias probe. The EuroTubes has never failed me, so I just set it based on that on one side, check the external bias points with a DMM and then match the other side to the one I set with the EuroTubes.
I recall these all take a lot of dialing in, which I won't get to do before Sat. I worked from home today to wait for FedEx and they came at 6pm. Now I have to cook and then help Mrs. Lee with the car when she gets home. Tomorrow I'm working from home, but so it Mrs. Lee, so I'll be playing through my GK 250ML. As always, these come biased pretty cold from the factory. I bumped it up to 70% and will begin the preamp tube rolling on Sat. when I can pull the chassis and access those. If you have one of these, you know the power tubes make it very hard to reach the preamp tubes without pulling the chassis. No matter. I will run this at full tilt for hours on Sat.
For those who know how to bias these, I'm getting vastly different readings with the external bias points vs. my EuroTubes bias probe. The EuroTubes has never failed me, so I just set it based on that on one side, check the external bias points with a DMM and then match the other side to the one I set with the EuroTubes.