- Feb 21, 2015
- Sunny...Sometimes Florida- USA
Whatever it takes to get the 8db leds to light up.Am I suppose to set the input gain at a certain position? how much voltage should the 50hz be sent at?
Yes...well you may not "need" to but you're looking for lowest thump.I have also tried with the file but I am not sure if I need to adjust both trims for less thump
The thump? If so, not out of the ordinary as the tubes will usually not be identical. If you're talking about calibrated levels, that's a different adjustment.Also channel 1 is louder than channel 2
Mine weren't, although they were a little closer. I'd say it doesn't matter but never asked.With fully clockwise trim I have a difference in voltage between both boards 3.89v and 4.15v before adjusting. Should they be same voltages with trim fully clockwise?
I asked about this a couple of times as well. Here was one of the responses from HeikkiAlso, if someone can explain to me what the link does? Which board becomes the controlling board, ?
"Link sums the control voltages together by paralleling the ratio pots. Which means the best way to adjust the ratio when link is on is to turn one ratio pot to max and use the other ratio pot to adjust ratio. To make the channels act as close to identical as possible attack, release and threshold should be on same position on both channels. This way of implementing the stereo link isn’t perfect but if absolute perfection and accuracy is needed then anything with tubes should be avoided. In my opinion stereo link is useless feature anyway and I only use it when checking tube balance.
Now that I actually think about it. I think I came up a better way of making the stereo link. The point where D2 and D3 anodes are connected together, wire the link switch to connect that point together on both boards. Try it first with a jumper cable and see if it works. That way the attack, release, threshold and ratio should be adjusted to same position to get perfect stereo link and there would be no confusion with the parallel ratio pots"
"Before removing the original way of linking try if the other method is better. If you don’t use the link you might ass well leave it like it is. There shouldn’t be large difference which way the link is implemented. "
Yeah. Some type of gain stage structure in the chain is useful.If I noodle with some audio file I need to raise the input fairly loud to hear and see some compression and thus increasing the overall volume, which makes it a little hard to compare when bypassing as the loudness is affecting the judgement