I choose this setup and i take on 6V6 buffer these measurments..
310V, 9.55V on 470Ω with 6.8ΚΩ. (TUBES 6P6S)
im so happy with this 6V6 CF ,smooth,sweet, detailed sound, extented bass.
6V6 line preamp
I am listening everyday my old cds and i hear new voices-sounds.
310V, 9.55V on 470Ω with 6.8ΚΩ. (TUBES 6P6S)
im so happy with this 6V6 CF ,smooth,sweet, detailed sound, extented bass.
6V6 line preamp
I am listening everyday my old cds and i hear new voices-sounds.
Attachments
Last edited:
Congratulations. Its nice to know that a guy with many high quality SS & digital DIY gear in his signature line achieved to also integrate the 6V6 pre enjoyably in his system. Happy listening. 
P.S. Your operating point parameters look well balanced for the particular valve.
P.S. Your operating point parameters look well balanced for the particular valve.
Thank you very much Nick for the nice-simple project that you gave us.
I turn back to listening to music.🙂
I turn back to listening to music.🙂
Nothing special Νick ,
Crystal audio tower model (TWIN 1000 Kevlar, inside the speakers indicate JWS made in Sweden.) i have them about 20 years
2X10¨ Woofers Kevlar, 8¨ mid Kevlar ,twiter cloth.
Crystal audio tower model (TWIN 1000 Kevlar, inside the speakers indicate JWS made in Sweden.) i have them about 20 years
2X10¨ Woofers Kevlar, 8¨ mid Kevlar ,twiter cloth.
Attachments
Last edited:
They got much cone area and a waveguide. Those are good things. If they also measure well enough in the room they can be satisfying due to above average sensitivity and power handling. They only look like current hungry enough but proper power amps you got. If you don't have acoustic measurement gear but you can hear bass notes distinct enough and the presence range isn't subdued for vocals so they come through strong but without undue heaviness in their lower registers or harshness in their upper registers while you can still hear cymbals well, that probably means they should be measuring generally balanced in the particular listening space.
.
Good luck. Also consider to make the cathode follower buffer version instead, like nikosokey did in the previous pages, if you don't need 15dB of gain. Most systems don't.
Most probably yes but I haven't tested with 100R between plate and screen grid. The control grid stopper can be any W since it drops no voltage.
It's time to prepare.
1) Power
350V-0-350V--200mA (340-360V?)
5V--3A
10V--1A
10V--1A
2) Tube 2 x 6V6 (USSR)
3) Tube 5R4GY or 5U4G or GZ34
4) Choke 20H/70R>100WA (do I need it? Can I avoid it?)
5) 2 x SSHV2
...
Plan is to build build cathode follower buffer and maybe later preamp.
PS. I Don't know nothing about tubes so be gentle.
1) Power
350V-0-350V--200mA (340-360V?)
5V--3A
10V--1A
10V--1A
2) Tube 2 x 6V6 (USSR)
3) Tube 5R4GY or 5U4G or GZ34
4) Choke 20H/70R>100WA (do I need it? Can I avoid it?)
5) 2 x SSHV2
...
Plan is to build build cathode follower buffer and maybe later preamp.
PS. I Don't know nothing about tubes so be gentle.
1) The transformer choice depends on the rectifier type's loss. They differ much. I would recommend you select 300-0-300 and a GZ34 which is not only small bottle but small loss too and clear. Can give near 350V DC on low capacitance input with that trafo (on max 60uF will give too much) and it likes a 75 Ohm minimum limiting resistance (Rt) per plate says that tube's manual. See attachment on voltage curves and Rt definition. That one can be supplemented with extra physical resistors if lacking.
4) You could avoid the choke since you will use regulators. Can use a CRC. Something like 10uF 450V plastic - 330R - 470u 450V electrolytic. You should analyze schemes with Duncan's Amps PSUD2 free PSU simulator. Google it. Feed it with your transformer's coils resistance data also. Can measure it when in hand. Add an 80mA current source as load to represent two SSHV2s set at 40mA each. 310V regulated and changing the 5K cathode resistor to 6.8K in the cathode follower can work fine also as in post #3262 with Russian tubes.
4) You could avoid the choke since you will use regulators. Can use a CRC. Something like 10uF 450V plastic - 330R - 470u 450V electrolytic. You should analyze schemes with Duncan's Amps PSUD2 free PSU simulator. Google it. Feed it with your transformer's coils resistance data also. Can measure it when in hand. Add an 80mA current source as load to represent two SSHV2s set at 40mA each. 310V regulated and changing the 5K cathode resistor to 6.8K in the cathode follower can work fine also as in post #3262 with Russian tubes.
Attachments
