page 43 www . delevan . com e-mail: apisales@delevan . com 270 quaker rd., east aurora ny 14052 ? phone 716-652-3600 ? fax 716-652-4814 rf inductors srf minimum (mhz) mil dash # (ref.) part number inductance ( h) tolerance inductance test frequency (mhz) q-test frequency (mhz) q minimum dc resistance maximum (ohms) current rating maximum (ma) series 1944 & 1945 molded unshielded rf coils 4000 3500 3000 3000 3000 2700 2500 2000 2000 1700 1500 1300 1100 1000 850 720 610 1600 1400 1200 1000 900 800 720 650 590 500 460 430 360 300 290 275 265 250 235 220 170 164 158 155 150 145 142 137 135 131 128 124 123 120 115 113 110 107 104 0.020 0.025 0.030 0.030 0.030 0.040 0.045 0.070 0.070 0.100 0.120 0.160 0.230 0.280 0.380 0.540 0.750 0.11 0.14 0.19 0.28 0.34 0.43 0.56 0.67 0.81 1.15 1.40 1.60 2.30 3.30 3.32 3.70 3.99 4.48 5.07 5.78 5.00 5.80 6.60 7.40 8.00 8.60 8.90 9.60 9.90 10.4 10.9 11.6 11.8 12.5 13.5 14.0 15.0 15.5 16.5 400 400 400 400 400 376 352 320 288 264 240 220 200 176 160 144 132 88 80 76 72 64 56 52 48 42.4 37.6 34.4 32.0 28.8 25.6 20.8 17.6 15.2 12.8 10.4 8.00 5.76 5.36 5.04 4.72 4.48 4.24 4.00 3.76 3.60 3.44 3.20 3.04 2.88 2.80 2.72 2.64 2.48 2.40 2.24 75 75 75 65 65 65 65 60 55 50 50 45 45 45 45 45 45 55 55 60 70 65 65 60 60 65 80 75 75 75 85 80 80 75 75 75 75 65 65 65 65 65 65 65 65 65 65 65 65 60 60 60 60 60 60 60 50 50 50 50 50 45 40 40 25 25 25 25 20 20 15 15 15 10 10 10 7.9 7.9 7.9 7.9 5.0 5.0 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 1.5 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 25 25 25 25 25 25 25 25 25 25 25 25 25 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 0.10 0.12 0.15 0.18 0.22 0.27 0.33 0.39 0.47 0.56 0.68 0.82 1.00 1.20 1.50 1.80 2.20 2.70 3.30 3.90 4.70 5.60 6.80 8.20 10.0 12.0 15.0 18.0 22.0 27.0 33.0 39.0 47.0 56.0 68.0 82.0 100 120 150 180 220 270 300 330 360 390 430 470 510 560 620 680 750 820 910 1000 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% 10% 10% 10% 10% 10% 10% 10% 10% 10% 10% 10% 10% 10% 10% 10% ?% ?% ?% ?% ?% ?% ?% ?% ?% ?% ?% ?% ?% ?% ?% ?% ?% ?% ?% ?% ?% ?% ?% ?% ?% ?% ?% test methods mil-prf-15305 test methods, only. ms21389-01 to ms21389-17, reference - 1944 series ms21390-01 to ms21390-39, reference - 1945 series physical parameters inches millimeters length 0.420 to 0.447 10.67 to 11.35 diameter 0.168 to 0.193 4.27 to 4.90 lead size awg #22 tcw 0.023 to 0.027 0.584 to 0.686 lead length 1.30 min. 33.02 min. current rating at 90? ambient 35? rise operating temperature ?5? to +125? maximum power dissipation at 90? series 1944: 0.385 w series 1945: 0.330 w marking parts are printed with delevan, inductance value/tolerance, and lot/date code. optional color banding is available; when required, suffix part number with the letter ?? packaging tape & reel: 12" reel, 2500 pieces max.; 14" reel, 3000 pieces max. for additional packaging options, see page 114. made in the u.s.a. ms21389 (reference) ? series 1944 phenolic core 1944-01m 1944-02m 1944-03m 1944-04m 1944-05m 1944-06m 1944-07m 1944-08m 1944-09m 1944-10m 1944-11m 1944-12m 1944-13m 1944-14m 1944-15k 1944-16k 1944-17k ms21390 (reference) ? series 1945 iron core 1945-01k 1945-02k 1945-03k 1945-04k 1945-05k 1945-06k 1945-07k 1945-08k 1945-09k 1945-10k 1945-11k 1945-12k 1945-13j 1945-14j 1945-15j 1945-16j 1945-17j 1945-18j 1945-19j 1945-20j 1945-21j 1945-22j 1945-23j 1945-24j 1945-25j 1945-26j 1945-27j 1945-28j 1945-29j 1945-30j 1945-31j 1945-32j 1945-33j 1945-34j 1945-35j 1945-36j 1945-37j 1945-38j 1945-39j optional tolerances: j = 5% h = 3% g = 2% f = 1%
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