GER FF soundcloud transistor comparison AC128, NKT275, OC70
Posted: Sat Mar 01, 2014 11:09 am
by AC128
0.00:
HT5 Crunch
0.14:
+ GER FF AC128 + NKZ275
0.27:
+ GER FF OC70 + NKT275
0.41:
+ GER FF OC70 + OC70
1.03:
HT5
1.05:
AC128 + NKT275
1.07:
OC70 + NKZ275
1.09:
OC70 + OC70
Re: GER FF soundcloud transistor comparison AC128, NKT275, O
Posted: Tue Mar 04, 2014 4:59 pm
by Ben79
The OC70 and the NKT sound to me a little tighter in the low end and more focussed. But I think maybe to make this a fair reflection on transistor models it would be necessary to test batches of each.
Re: GER FF soundcloud transistor comparison AC128, NKT275, O
Posted: Mon Mar 10, 2014 7:47 am
by AC128
Ben79 wrote:The OC70 and the NKT sound to me a little tighter in the low end and more focussed. But I think maybe to make this a fair reflection on transistor models it would be necessary to test batches of each.
absolutely, this is by no means a thorough comparison, if anything it reflects my changing taste in FF.
I started out with 2x AC128 both selected from around 10 transistors, then I added a NKT275 after experimenting with 2 NKT275 and the order, then did the same when I rediscovered my OC77 transistors and ended up with liking the two OC70s best.
Re: GER FF soundcloud transistor comparison AC128, NKT275, O
Posted: Mon Mar 10, 2014 2:24 pm
by kurmudgeon
did you compensate the bias for different gain values in the circuit? or did you get transistors with comparable gains?
