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Need help to make Quad II OPT SPICE Model
Need help to make Quad II OPT SPICE Model
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Old 23rd November 2017, 07:50 AM   #1
jerrylong is offline jerrylong  China
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Default Need help to make Quad II OPT SPICE Model

I am trying to make a Quad II OPT SPICE Model, and I have readed the Ayumi article of Quad II.
1 QUAD II circuit
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Old 23rd November 2017, 07:53 AM   #2
jazbo8 is offline jazbo8
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Need help to make Quad II OPT SPICE Model
It's given in the page that you linked to: 1 QUAD II???????
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Old 23rd November 2017, 07:53 AM   #3
jerrylong is offline jerrylong  China
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here is the circuit
1.png

and this is the SPICE model he made
Code:
quadopt.inc 
    1 *
    2 *   QUAD II opt
    3 *
    4 .SUBCKT QOPT P1 B1 B2 P2 S1 S0 S2 X1 X0
    5 * Primary inductance (p-p 3000ohm 11H)
    6 L11 P1 11 2.75H
    7 L12 12 P2 2.75H
    8 * Primary DC resistance
    9 R11 11 B1 100
   10 R12 B2 12 100
   11 * Primary stray capacitance
   12 CP P1 P2 5.52399786225324e-10
   13 * KNF inductance
   14 L13 S1 21 0.03128889H
   15 L14 22 S2 0.03128889H
   16 * KNF DC resistance
   17 R13 S0 21 10.6667
   18 R14 S0 22 10.6667
   19 * Secondary inductance
   20 L15 X1 31 0.01677264H
   21 * Secondary DC resistance
   22 R15 31 X0 0.2694
   23 * coupling factor
   24 K1 L11 L12 0.99989
   25 K2 L11 L13 0.99989
   26 K3 L11 L14 0.99989
   27 K4 L11 L15 0.99989
   28 K5 L12 L13 0.99989
   29 K6 L12 L14 0.99989
   30 K7 L12 L15 0.99989
   31 K8 L13 L14 0.99988
   32 K9 L13 L15 0.99989
   33 K10 L14 L15 0.99989
   34 .ENDS
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Old 23rd November 2017, 07:54 AM   #4
jazbo8 is offline jazbo8
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Need help to make Quad II OPT SPICE Model
So what are you asking?
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Old 23rd November 2017, 07:59 AM   #5
jerrylong is offline jerrylong  China
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but here is the problems:
1, which part is X1 31 of the Secondary wiring?
2, in the KNF part, he set inductance of L13(S1~21) and L14(22~S2), then set DC resistance of R13(S0~21) and R14(S0~22), why the DC resistance and inductance not mach with each other?
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Old 23rd November 2017, 08:07 AM   #6
jazbo8 is offline jazbo8
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Need help to make Quad II OPT SPICE Model
What problem?! Are you not reading the same model? It's clearly stated: Secondary inductance --> L15 X1 31 0.01677264H, L13=L14, and R13=R14.
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Old 23rd November 2017, 08:10 AM   #7
jerrylong is offline jerrylong  China
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And I found some information here about
QUAD II Valve Power Amplifier Information

16.JPG

Prim turns of XY=YZ=L1+L3+L5=L9+L11+L14=477*3=1431
NFB turns of UV=VW=L7a=L7b=159
Sec turns L2=L4=L6=L8=L10=L12=51

PQ is 0~4(NFB)

the inductance setting of each part of Auymi's SPICE model seems not maching the turns here
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Old 23rd November 2017, 08:13 AM   #8
jerrylong is offline jerrylong  China
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Quote:
Originally Posted by jazbo8 View Post
What problem?! Are you not reading the same model? It's clearly stated: Secondary inductance --> L15 X1 31 0.01677264H, L13=L14, and R13=R14.
Sorry I have not found the stated line that you mentioned in the model
17.JPG
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Old 23rd November 2017, 08:13 AM   #9
jazbo8 is offline jazbo8
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Need help to make Quad II OPT SPICE Model
Please read lines 13 to 20. In any case, I would trust Nakabayashi-san much more than Mr. Snook... If you think Ayumi's model is incorrect then do not use it and make your own.
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Old 23rd November 2017, 08:18 AM   #10
jerrylong is offline jerrylong  China
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Yes I would like to use Mr Nakabayashi-san's model but it seems some parts of the SPICE code is missing. the code that you mentioned is not in the Model code. You can check it on his web.
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