how did Manley get dragged into this?
good to see SSL Tech back at the table,
let us see how the 31 UI lam deals with the flux,
B=100,000,000 E / 4.44 K1 Turns Freq Area(cm^2)
K1=0.90 for 1 x 1 stack,
B=25,000,000 E /Turns freq Area,
use 20 Hz,
B=1,250,000 E / Turns Area,
use 888 Turns for pri on A-10, HA100-X,
B=1,408 E / Area , now we can get flux for different stack heights,
these lams have a
tongue width of 5/16", convert to cm,
0.3125 * 2.54 = 0.79375, square that for area>
0.63 cm^2
B-max for sq stack is 1,408 E/0.63 =
2,235 E
A-10 has 31 to 34 lams depending on vintage and thickness, which = 7/16",
convert to metric = 0.882 cm^2 so B-max =
1,596 E
and HA100-X has about 37 lams which = 1/2" stack = 1.008 cm^2
so B-max =
1,397 E
B-max A-10 = 1,596 E B-max HA100-X = 1,397 E,
so HA100-X will take, in theory, 1,596/1,397 =
14% more voltage, before saturating,
15 dbm is about 4.4 volts, 16 dbm is about 4.9 volts, = 11% difference,
so at 20 Hz the propeller heads at UTC are running these 2 nickel cores at
A-10: 1,596 *4.4 = 7,022 Gauss, HA100-X: 1,397 * 4.9 = 6,845 Guass,
a bit high for 80 Ni, which saturates at 5 K Gauss,
but like PRR mentioned, most program material is not at 20 Hz, so i guess we will let them slide on this catalog stuff,
flux increases as frequency goes down, so the HA100-X will have less distortion and roll off at 20 Hz, which is shown in the catalogs as 20 vs 30 Hz,
what is not in the catalog pages? the effect of the 3 extra cans inside the HA-100X,
this can change capacitance to ground, which means you short out a little more high end,
it can also increase leakage inductance a bit since the thin metal can absorb some flux,
here are some catalog pages concerning these 2 guys,
where did Emrr get that 30's catalog? i need a copy,
these two transformer models were very popular and thus sold a lot of units,
maybe this is why turns counts varied so much,
i seldom counted the same pri and sec turns even for the same,
so the turns listed on the print are an average from about 5 or 6 take-a-parts,