Hey guys, I've been looking at the Gilmore amp and I wanted to clear some things up in my mind. I'm not an electrical engineer, so that indicates the quality of my questions:-
1.I presume the Output + is the same as Headphone Output in Figure 1. That being the case does the headphone ground line go to the amp ground, between the two 3.3k resistors?
2.Is that the same ground that the 1k resistor at I- and that OP27+ input, goes to?
3.And is that the same ground as the centre rail ground of the power supply?
4.There seems to be some comment in the forum that the performance of the amp (the "bass and slam") improves if you add the balanced bridge output. Can you do this if you don't have dual mono headphones or if you don't want to convert your cans to dual mono? And if you have standard headphones, do you then have to tie the O- of the left and right channels together and return the headphone ground to that point?
5.It looks like in Australia I can't get 1.6V LED's - the readily available LED's are 1.7V and up. Will that matter, or does it only matter that they are balanced? Or will it upset the bias voltage of the 2SC1815 transistor and cause a problem?
Thanks for considering my questions
qbe
1.I presume the Output + is the same as Headphone Output in Figure 1. That being the case does the headphone ground line go to the amp ground, between the two 3.3k resistors?
2.Is that the same ground that the 1k resistor at I- and that OP27+ input, goes to?
3.And is that the same ground as the centre rail ground of the power supply?
4.There seems to be some comment in the forum that the performance of the amp (the "bass and slam") improves if you add the balanced bridge output. Can you do this if you don't have dual mono headphones or if you don't want to convert your cans to dual mono? And if you have standard headphones, do you then have to tie the O- of the left and right channels together and return the headphone ground to that point?
5.It looks like in Australia I can't get 1.6V LED's - the readily available LED's are 1.7V and up. Will that matter, or does it only matter that they are balanced? Or will it upset the bias voltage of the 2SC1815 transistor and cause a problem?
Thanks for considering my questions
qbe
