Good to see you free and OT againLooks like NElson dropped the zener for bjt/TL based bias net?
Seems so, in the picture there are no longer blue LEDs.....
And I see negative K2 phase! The small white resistor in the upper part near the offset pot is the positive side, so he drives the F6 with negative phase.....
DCB1 has been working very nicely for me so I was thinking 3 red leds (3x1.8V) filtered by a 0,22uF teflon to bias my IRFs.
good catch ... so thats what he meant when he said that he was playing with three ways. neat amp!
My subjective opinion is yes. Fortunately I have objective backing in this case. The Vishay TNPW and Susumu RG I have used, show uber low current noise numbers. May not notice it as much in a power amp when compared to RIAA, but if you look inside PASS preamps, that is what you find. I use them in power amps because I like the clean look. At at the end of the day, I believe they improve things a bit. Little more clarity and slightly improved space. Kinda like a good reg on a preamp. Of course it assumes that you got all other noise issues under control.
I remember back in a J2 discussion somewhere, N.P. saying about the 6 legged device, that there will be a different number of pins next time. Or something?
TLV maybe
Double checked... never seen anything but through hole components in Pass products...
Yup. In the quantity he buys, 5ppm, low noise SMD, is chump change. Susumu RG is 5ppm and so quiet it is getting difficult to measure. TNPW measures same S102K. If you get setup for it, easier than through hole to solder.
It helps me sleep, as it removes one more excuse for me not to like something or another part for me to want to dabble with.
In RIAA, stepping from Vishay TNPW to .2ppm TX2575, was noticable, but worth $10? Thats why RG is next on the list, it is getting even closer....in theory, and only cost $.35/resistor. Funny all this talk about SMD and we have a transformer in the circuit
Still my favorite, but gotta try J2 and M2. BA3B already cued up.
It helps me sleep, as it removes one more excuse for me not to like something or another part for me to want to dabble with.
In RIAA, stepping from Vishay TNPW to .2ppm TX2575, was noticable, but worth $10? Thats why RG is next on the list, it is getting even closer....in theory, and only cost $.35/resistor. Funny all this talk about SMD and we have a transformer in the circuit
Still my favorite, but gotta try J2 and M2. BA3B already cued up.
A piece of art, and practical too. Love the placement symmetry of its components. It is disqualified as a black box.
hard is o.k! They work hard for this.....
the longer I am in the Pass forum the more I admire the patience and the power of decision to place a product as finished....!
So many varaiables.
last info on the F6 resistor splitting in PSU.....
yesterdays experience was with 2x four 1R in the PSU between the cap banks....
the soundstage got more volume, but the sound got less dramatic on sax and so on...
I remembered the F6 PSU has only 0R47 in it, so I simply added four more 1R in the right places and got more liveliness back.
Especially for k3 dominant FW Amps (F5, M2, F1 clones) this mod is a possibility to make the sound less "aggressive" and more round....
I think you have to check the right value for your system, for mine the 8x1R splitted solution was a bit too much....
would be nice to hear other peoples experiences......
yesterdays experience was with 2x four 1R in the PSU between the cap banks....
the soundstage got more volume, but the sound got less dramatic on sax and so on...
I remembered the F6 PSU has only 0R47 in it, so I simply added four more 1R in the right places and got more liveliness back.
Especially for k3 dominant FW Amps (F5, M2, F1 clones) this mod is a possibility to make the sound less "aggressive" and more round....
I think you have to check the right value for your system, for mine the 8x1R splitted solution was a bit too much....
would be nice to hear other peoples experiences......