10-28-2014, 08:02 AM
Because I like complicating my life, I decided to give aligning this a whirl. In addition to all the SW bands being off, the magnetic tuning is definitely off, as I can hear a shift in tone and hiss when it's turned on/off. I know this adjustment can be very finicky. As I found a post from Ron saying you can align this set without hanging an external tuning cap off it, I decided to give it a go.
I usually align by AVC, so I have my VTVM hanging of pin 5 of the 6J5 AVC tube. I ran trough it all, and I seem to have it aligned pretty well. But the mag tuning is still off. I think I may have misiturpreted the directions though. For adjusting the primary of the magnetic transformer (81P), it says to crank up the generator to max and get minimum output from the speaker. If I'm watching the AVC, then I would really adjust this like any other adjustment - max negative AVC, right? I think last night I had a brain fart and was trying to hit more positive AVC with that adjustment, which didn't seem right last night.
So I think I need to run through it again tonight. Just want to make sure I am now correctly interpreting the adjustment on 81P. I guess I should confirm 81S as well. I would still adjust it to get the max negative AVC in that step, correct? I think I'm just getting confused by the min/max designations on the output, when I'm really watching AVC and should always be adjusting for max negative voltage there.
I usually align by AVC, so I have my VTVM hanging of pin 5 of the 6J5 AVC tube. I ran trough it all, and I seem to have it aligned pretty well. But the mag tuning is still off. I think I may have misiturpreted the directions though. For adjusting the primary of the magnetic transformer (81P), it says to crank up the generator to max and get minimum output from the speaker. If I'm watching the AVC, then I would really adjust this like any other adjustment - max negative AVC, right? I think last night I had a brain fart and was trying to hit more positive AVC with that adjustment, which didn't seem right last night.
So I think I need to run through it again tonight. Just want to make sure I am now correctly interpreting the adjustment on 81P. I guess I should confirm 81S as well. I would still adjust it to get the max negative AVC in that step, correct? I think I'm just getting confused by the min/max designations on the output, when I'm really watching AVC and should always be adjusting for max negative voltage there.