E180F V EF184

[RajkoM]

As to the triode model of E180F_T posted above - beware, there is "." (dot) is added after X3 value. You need to remove it. See below:
--------------------------------------------------------|
.SUBCKT E180F_T A G K
.PARAM X1=-0.59576533 X2=0.0094827837 X3=-0.8531559.

It should read
.SUBCKT E180F_T A G K
.PARAM X1=-0.59576533 X2=0.0094827837 X3=-0.8531559

Yes, you're right.
BTW, I've always used pentode model / pentode symbol with a 100 ohm resistor G2-A. With Mullard E180F in practice I get accurate results.

 

[Celsius]

By using a CCS as anode resistor, it is possible to get more than 200 Vpp with low distortion.

As an example from my memos:

Triode connected 6J9P with CCS and 100k load resistance.
+Ub = 350 V, Ik = 12 mA, Ua = 220 V, Uout 80 Vrms (=226 Vpp), THD = 0,58 %, G = 32 dB

Below is a schematic showing the basic idea of such high voltage driver (but with different tube...)

An externally hosted image should be here but it was not working when we last tested it.

Artosalo the first thank for your contribution.

This christmas I receive form Saint Claus a pair of beautiful Psvane 211 🙂

and now I am ready to begin to make a 211 full amp, I would like to do the amp with two stages.

well 211 need 150ppV in this case I need a 50 gain 1v (CD player) x 50 / 0,35 = 150ppV , but all pentodes straped to triode normal gain is 30-35.
I think that only have the way to use a CCS in pentode mode.
I am going to open a new post named 211 open source. where I show all details and steps of the project.

Why nobody speak about the important detail of the Ri, I have readed that a high plate impendance is responsable of the low frequencies losses and later need the NFB to minimize this losses. what is the true in this afirmation.
happy christmas
Celsius

 

[Simply Audio]

E180F Triode Connected 10K R 180V Plate -2v Bias 15mA 0.22uF Capacitor sounds very nice indeed driving a 300B 5K load biased at -65v
CCS is not needed just don't use a large coupling capacitor as recharging between transients will be noticed. 0.22uF will give full bass extension without any issues.

 

[Celsius]

For Long voltage swing 180vpp which one are better?

 

[Simply Audio]

It becomes subjective if the question is audio quality when listening rather than measuring

 

[Celsius]

It becomes subjective if the question is audio quality when listening rather than measuring

in this case the possible answer only can be about measuring 🙂



seem very good

 

[Simply Audio]

With 12K Load LIne

 

[Charm]

...

 

[RajkoM]

Please use E180F in triode mode with only up to 2W dissipation. These are bottles about 3 cm high (w/o pins and pimps on top).
If you want more dissipation, use Sylvania E180F which has about 38mm bottle. Sylavania experts are not stupid.