Tag: 6P15P triode

6P15P triode strapped models

I’ve been playing lately with the 6P15P. Also I have developed several spice models of these Russian clones which I will be publishing shortly when I get the time to do the proper write up.

I use Dmitry’s Paint_kit tool a lot. It’s very good and accurate once you learn how to use it. It’s not easy to match triodes first time as many variables are in play. After working with Derk Reefman on the pentode models, I noticed a slight divergence on his triode models. Derk suggested that the best was to use the triode-strapped pentode for this. Here is a simple comparison between Dmitry’s model and Derk’s:

6P15P triode model comparsion
Derk and Dmitry’s models under test

 

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Russian pentodes in triode mode

After some proper time tracing the curves, here are a set of Russian high-frequency pentodes in triode-mode for comparison. I was looking at closer ones to D3a and these are the ones I had at hand and wanted to include in the tests:

6Z5P 6Z9P 6Z11P 6Z49P-D 6Z51P 6P15P 6E5P 6E6P-E D3a
Vf [V] 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3
If [ma] 450 300 440 300 300 760 600 610 315
Pa [W] 4 3.75 6 3.4 3.5 13.5 10.6 8.8 4.5
Gm [ma/V] 7 35 33 17.75 29 16 32 25 34
μ 44 36 40 44.3 79.5 22 30 34 68
Ra [Ω] 6K2 1k 1K2 2K5 2K7 1K6 960 1K3 2K
Ia [ma] 16 29 40 15.7 23 52 50 30 22
Va [V] 252 125 150 200 150 250 200 200 200

Well, as you can see in the table above, the 6e5p and 6e6p-e (both tetrodes) were included in the list.  Some interesting points to highlight:

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