** Evaluate the Q models in ARRL Radio Designer Manual
** Pages 15-14 and 15-15 of the ARD Manual
**
** * Loss comments at 50.329 MHz
**
** Zack Lau W1VT 5/28/99

qval:10

qvar:(10*50.329MHz/f); Capacitor with fixed resistive loss.

*******************************************
*Correlate circuit performance with Q

blk
cap 1 2 c=100pf q=1 f=50.329MHz
ind 2 3 l=100nh
qat1:2por 1 3
end
* 1.36 dB loss

blk
cap 1 2 c=100pf q=3.16 f=50.329MHz
ind 2 3 l=100nh
qat3r16:2por 1 3
end
* 0.76 dB loss

blk
cap 1 2 c=100pf q=10 f=50.329MHz
ind 2 3 l=100nh
qat10:2por 1 3
end
* 0.27 dB loss

blk
cap 1 2 c=100pf q=31.62 f=50.329MHz
ind 2 3 l=100nh
qat31r62:2por 1 3
end
* 0.09 dB loss

blk
cap 1 2 c=100pf q=100 f=50.329MHz
ind 2 3 l=100nh
qat100:2por 1 3
end
* 0.03 dB loss

*******************************************

q150:350

qatc:(q150*(150MHz/f)^1.6) ;ATC's suggested Q model

blk
cap 1 2 c=100pf q2=qatc f=50.329MHz
ind 2 3 l=100nh
atc:2por 1 3
end

*******************************************

blk 
cap 1 2 c=100pf q=qvar f=5.0329MHz
ind 2 3 l=100nh
verqcl:2por 1 3
end
*0.03 dB loss, Q=100 

blk
cap 1 2 c=100pf q=qvar f=50.329MHz
ind 2 3 l=100nh 
verqc:2por 1 3
end
*0.27 dB loss, Q=10

blk
cap 1 2 c=100pf q=qvar f=503.29MHz
ind 2 3 l=100nh
verqch:2por 1 3
end
*1.36 dB loss Q=1

*Capacitors show more loss at lower frequency;
*503 MHz Q=10 capacitor is worse than a 5 MHz 
*capacitor Q=10 at 50 MHz. 
* Not recommended
* program confused by q(f) and qvar(f)
*******************************************

blk 
cap 1 2 c=100pf q1=qvar f=5.0329MHz
ind 2 3 l=100nh
verq1cl:2por 1 3
end
*0.09 dB loss Q=31.62

blk
cap 1 2 c=100pf q1=qvar f=50.329MHz
ind 2 3 l=100nh 
verq1c:2por 1 3
end
* 0.27 dB loss Q=10

blk
cap 1 2 c=100pf q1=qvar f=503.29MHz
ind 2 3 l=100nh
verq1ch:2por 1 3
end
*0.76 dB loss Q=3.16

*Capacitors show more loss at lower frequency;
*503 MHz Q=10 capacitor is worse than a 5 MHz 
*capacitor Q=10 at 50 MHz. 
* Not recommended
* program confused by q1(f) and qvar(f)
*******************************************

blk 
cap 1 2 c=100pf q2=qvar f=5.0329MHz
ind 2 3 l=100nh
verq2cl:2por 1 3
end
*0.27 dB loss

blk
cap 1 2 c=100pf q2=qvar f=50.329MHz
ind 2 3 l=100nh 
verq2c:2por 1 3
end
*0.27 dB loss

blk
cap 1 2 c=100pf q2=qvar f=503.29MHz
ind 2 3 l=100nh
verq2ch:2por 1 3
end
*0.27 
dB loss

*Model Q2 works with qvar(f). 
*f in the statement line does not affect Q

*******************************************

blk
cap 1 2 c=100pf q=qval f=50.329MHz
ind 2 3 l=100nh 
verq:2por 1 3
end
*0.27 dB loss Q=10

blk
cap 1 2 c=100pf q1=qval f=50.329MHz
ind 2 3 l=100nh 
verq1:2por 1 3
end
* 0.27 dB loss Q=10

blk
cap 1 2 c=100pf q2=qval f=50.329MHz
ind 2 3 l=100nh 
verq2:2por 1 3
*0.27 dB loss Q=10

end
blk
cap 1 2 c=100pf q=qval f=5.0329MHz
ind 2 3 l=100nh 
verql:2por 1 3
*0.03 dB loss Q=100

end
blk
cap 1 2 c=100pf q1=qval f=5.0329MHz
ind 2 3 l=100nh 
verq1l:2por 1 3
*0.09 dB loss Q=31.6

end
blk
cap 1 2 c=100pf q2=qval f=5.0329MHz
ind 2 3 l=100nh 
verq2l:2por 1 3
end
*0.27 dB loss Q=10

blk
cap 1 2 c=100pf q=qval f=503.29MHz
ind 2 3 l=100nh 
verqh:2por 1 3
end
*1.36 dB loss Q=1

blk
cap 1 2 c=100pf q1=10 f=503.29MHz
ind 2 3 l=100nh 
verq1h:2por 1 3
end
*0.76 dB loss Q=3.16

blk
cap 1 2 c=100pf q2=10 f=503.29MHz
ind 2 3 l=100nh 
verq2h:2por 1 3
end
*0.27 dB loss Q=10

blk
cap 1 2 c=100pf 
res 2 3 r=31.4
* Xc/Rs=1 at 50.329 MHz
ind 3 4 l=100nh
net:2por 1 4
end
*2.37 dB loss

blk
cap 1 2 c=100pf
res 1 2 r=31.4
*Rp/Xc=1 at 50.329 MHz
ind 2 3 l=100nh
net1:2por 1 3
end
*1.36 dB loss

blk
cap 1 2 c=100pf
res 1 2 r=314
*Rp/Xc=10 at 50.329 MHz
ind 2 3 l=100nh
net10:2por 1 3
end
*0.27 dB loss

blk
cap 1 2 c=100pf
res 1 2 r=3140
* Rp/Xc=100 at 50.329 MHz
ind 2 3 l=100nh
net100:2por 1 3
end
*0.03 dB loss

freq
5.0329MHz
50.329MHz
503.29MHz
end