This is just from the top of my head so do not take it as the truth . Think a bit for yourself to be sure .Papa_lazerous wrote:I really need to get into SPICE
I had a look at it a while ago and couldnt get into it, I dont know what the best version to try is.... I should definately give ti a try though.
I was the same with Eagle I didnt like th elook of it and went away and now I am into it and love it
Any spice advice apreciated certainly makes things safer and cheaper to try
The current draw from the first three triode stages should be low..probably below 1.5mA each. The power stage triode half has a max anode dissipation of 1.1W or something. At 200V you should therefore get away with 5.5mA. (gives total 10mA) . Perhapsthat was the reason I settled on 15k when testing the supply.
In reality my memory say that current consumtion with signal present was much higher than that in this amp despite it is class A from in to out.
The power stage cathode bias resistor is probably not telling the hole truth about how much anode current there is because my memory tells me that there was some serious grid current flowing when hard pushed.
I am not on the right computer now but at least found this model with google
*Vacuum Tube submini 6021
.SUBCKT X6021 A G K
* ANODE MODEL
BLIM LI 0 V=(URAMP((V(A)-V(K))))* 0.0037
BGG GG 0 V=((V(G)-V(K))*0.61)--0.14
BRP1 RP1 0 V=URAMP(-V(GG)* 0.09869 )
BRP2 RP2 0 V=V(RP1)-URAMP(V(RP1)-0.999)
BRPF RP 0 V=(1-V(RP2)^ 1 )+URAMP(V(GG))* 0.1
BGR GR 0 V=URAMP(V(GG))-URAMP(-(V(GG)*(1+V(GG)* 0.012937 )))
BEM EM 0 V=URAMP(V(A)-V(K)+V(GR)* 50.093 )
BEP EP 0 V=(V(EM)^ 1.53 )*V(RP)* 0.00001063
BEL1 EL1 0 V=URAMP(V(EP))
BEL EL 0 V=V(EL1)-URAMP(V(EL1)-V(LI))
BLD LD 0 V=URAMP(V(EP)-V(LI))
BAK A K I=V(EL)
* GRID MODEL
BGF GF 0 V=(URAMP(V(G)-V(K)--0.5 )^1.4)* 0.00012
BG G K I=V(GF)+V(LD)
* CAPS
CAK A K 0.00000000000028
CGK G K 0.0000000000007
CGA G A 0.0000000000015
.ENDS X6021
Should work in circuitmaker for instance (or any 3f4 spice). May not be the best spice software there is out there but should be available for free in a limited version and very easy to use without to much learning threshold .
Just open the triode.sub file with triode models and paste the text and it should show up when opening the software.