C3m linestage

[bequerel]

Thanks, got it!

I have stash of C3m and C3o tubes to experiment with during the summer.

[Dr.X]

Hi,
I have a couple of questions re. triode-connected C3m if anyone could help...

1] Triode-coupled, what's the approx. amplifcation factor?

2] How do they sound? Specifically, compared to the Russian 6c45 or similar?

Many thanks!
Doc

[AndreasS]

Originally posted by Dr.X
...
1] Triode-coupled, what's the approx. amplifcation factor?...

Depends of the circuit..., µ g1/g2 = 19.

Andreas

[bequerel]

AndreasS, hope you will take a minute to answer a simple question since you obviously know this tube well:

Is the Ri in triode mode around 2k?

[AndreasS]

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

[Dr.X]

Originally posted by AndreasS



Depends of the circuit..., µ g1/g2 = 19.

Andreas

Thanks Andreas

[bequerel]

Originally posted by AndreasS
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!

[mach1]

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 !

[bequerel]

Originally posted by mach1
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]

i would like to build one myself. have the siemens tubes in my drawer.

got any schematic to share? TIA

erwin