Re: Couple of C3m questions...
Depends of the circuit..., µ g1/g2 = 19.
Andreas
Dr.X said:...
1] Triode-coupled, what's the approx. amplifcation factor?...
Depends of the circuit..., µ g1/g2 = 19.
Andreas
The Ri (triode mode) is shown on datasheet page 17
http://frank.pocnet.net/sheets/009/c/C3m.pdf
For the operation point @ 16 mA Ri is around 2,5 kOhms
Andreas
http://frank.pocnet.net/sheets/009/c/C3m.pdf
For the operation point @ 16 mA Ri is around 2,5 kOhms
Andreas
Re: Re: Couple of C3m questions...
Thanks Andreas
AndreasS said:
Depends of the circuit..., µ g1/g2 = 19.
Andreas
Thanks Andreas
AndreasS said:The Ri (triode mode) is shown on datasheet page 17
http://frank.pocnet.net/sheets/009/c/C3m.pdf
For the operation point @ 16 mA Ri is around 2,5 kOhms
Andreas
Thanks a lot AndreasS!
bequerel,
to determine the plate resistance of any tube at any operating point, plot the operarating point on the plate curves, then draw a line tangential to the curve that runs through your operating point. The slope of that line (delta V over delta I) is the plate resistance.
Easy !
to determine the plate resistance of any tube at any operating point, plot the operarating point on the plate curves, then draw a line tangential to the curve that runs through your operating point. The slope of that line (delta V over delta I) is the plate resistance.
Easy !
mach1 said:bequerel,
to determine the plate resistance of any tube at any operating point, plot the operarating point on the plate curves, then draw a line tangential to the curve that runs through your operating point. The slope of that line (delta V over delta I) is the plate resistance.
Easy !
Thanks, I will print out your reply and save in my drawer.
milen007 said:i would like to build one myself. have the siemens tubes in my drawer.
got any schematic to share? TIA
erwin
The only two schematics I have ever seen are the one from kstagger who replied further up in this thread, and one that was posted over at vt4c.com some time ago:
http://www.vt4c.com/bb/viewtopic.php?t=1567
C3m pentode linestage
Hi
I have built and using a C3o linestage, but operating C3o in a pentode mode. C3o is a 6.3V version of C3m.
Somebody else posted a very useful warning, do not remove the tubes after you have turned off, I usually wait for 30 minutes. I lost a few C3m's this way, before I went with C3o. When I had the C3m, I was rectifying it, with C3o, I have a/c filaments.
The power supply uses Hashimoto PT-100, with a Hashimoto Choke for choke input supply. Then I have 4 regulators - one for each plate and one for each screen. These are current sourced -- shunt reg's. I am sorry I cannot post the schematic here, 'cause it is a borrowed schematic and not my own. You can also use Allen Wright's SuperReg - two of them, one for both Plates and one for both Screens.
Please shoot me an email to sridhar.ganti@gmail.com if you have any questions. This is the best linestage I have heard/built.
I also use VH Audio 1mF teflons for the o/p caps and Goldpoint 50K volume control and Goldpoint selector switch.
Chung had posted a copy of this at vt4c.com forum also.
Thanks
ganti
Hi
I have built and using a C3o linestage, but operating C3o in a pentode mode. C3o is a 6.3V version of C3m.
Somebody else posted a very useful warning, do not remove the tubes after you have turned off, I usually wait for 30 minutes. I lost a few C3m's this way, before I went with C3o. When I had the C3m, I was rectifying it, with C3o, I have a/c filaments.
The power supply uses Hashimoto PT-100, with a Hashimoto Choke for choke input supply. Then I have 4 regulators - one for each plate and one for each screen. These are current sourced -- shunt reg's. I am sorry I cannot post the schematic here, 'cause it is a borrowed schematic and not my own. You can also use Allen Wright's SuperReg - two of them, one for both Plates and one for both Screens.
Please shoot me an email to sridhar.ganti@gmail.com if you have any questions. This is the best linestage I have heard/built.
I also use VH Audio 1mF teflons for the o/p caps and Goldpoint 50K volume control and Goldpoint selector switch.
Chung had posted a copy of this at vt4c.com forum also.
Thanks
ganti
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
- Home
- Amplifiers
- Tubes / Valves
- C3m linestage