hatbeardglasses
New member
So I just finished aligning my 80-8, my first time attempting this operation. I've recorded a few projects on it before doing an alignment, and they all came out sounding fine, but it was time to find out what was really going on.
It seemed to go relatively well, some significant adjustments needed to be made (one track that had been unusable came back into spec).
There were a few issues that confused me a bit, particularly setting the bias level and the record eq.
I had a hard time figuring out how to center the meters for bias adjustment. Some of the tracks, the reading would go off the scale and I'd have to recenter the meter. I wound up turning the trim pot all the way down, and basically starting from 0 (which I take to be 0 bias current), and nudging the input control so the needle would stay on the scale. I guess the hard part was figuring out what to do from where the pots already were, as if I turned clockwise, the needle would drop all the way to zero. Starting from fully counterclockwise and turning up until peak, then down 3 db would put the trims about where the other ones were starting from, so I satisfied myself with that.
The one thing that I don't think was working properly was adjusting the record eq. Using 15 khz, when I switched to the monitor head, the first few tracks read a couple db higher than the input, and when I tried adjusting the trim, the needle didn't move. This was true for the record eq, and the peak adjust. After three tracks of the same behavior, I just abandoned this part.
I recorded some Rhodes piano on track 1, which had been giving me trouble (meters read sine tones with a little wobble), and it sounded pretty good, so I stopped there.
Anyone have any insight for adjusting bias or record eq?
thanks in advance.
-David
It seemed to go relatively well, some significant adjustments needed to be made (one track that had been unusable came back into spec).
There were a few issues that confused me a bit, particularly setting the bias level and the record eq.
I had a hard time figuring out how to center the meters for bias adjustment. Some of the tracks, the reading would go off the scale and I'd have to recenter the meter. I wound up turning the trim pot all the way down, and basically starting from 0 (which I take to be 0 bias current), and nudging the input control so the needle would stay on the scale. I guess the hard part was figuring out what to do from where the pots already were, as if I turned clockwise, the needle would drop all the way to zero. Starting from fully counterclockwise and turning up until peak, then down 3 db would put the trims about where the other ones were starting from, so I satisfied myself with that.
The one thing that I don't think was working properly was adjusting the record eq. Using 15 khz, when I switched to the monitor head, the first few tracks read a couple db higher than the input, and when I tried adjusting the trim, the needle didn't move. This was true for the record eq, and the peak adjust. After three tracks of the same behavior, I just abandoned this part.
I recorded some Rhodes piano on track 1, which had been giving me trouble (meters read sine tones with a little wobble), and it sounded pretty good, so I stopped there.
Anyone have any insight for adjusting bias or record eq?
thanks in advance.
-David