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RF Variable Inductors - 7mm Series 126 & 800

Variable Inductor
  • Standex 7mm variable inductors are available shielded or unshielded and are a true 7mm square, even when shielded.
  • Series 126 is available in high temperature plastic for more severe applications.
  • Series 800 is available in higher inductance values than competing designs with a similar size.
  • Series 126 is more reliable than competing designs when used shielded and tapped.
  • Inductances are available from .063µH to .790µH

Dimensions DividerElectrical Specifications DividerNotes


Dimensions for Series 126 & 800

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Electrical Specifications - 7mm - Series 126 & 800

Series 800 Unshielded - Closewound

Part Number * Inductance µH Minimum Q
Suggested
Core		  
No Core		  
Minimum		  
Nominal		  
Maximum		 @Nom L
@40 MHz
800102  J2   0.069 0.071 0.076 0.082 101
800103  J2   0.090 0.093 0.106 0.119 106
800104  J2   0.116 0.120 0.142 0.165 103
800105  J2   0.142 0.147 0.180 0.213 102
800106  J2   0.169 0.175 0.220 0.266 100
800107  J2   0.198 0.205 0.260 0.322 99
800108  J2   0.225 0.232 0.300 0.368 91
800109  J2   0.260 0.267 0.350 0.427 95
800110  J2   0.290 0.302 0.390 0.475 102
800111  J4   0.323 0.360 0.500 0.660 86
800112  J4   0.350 0.382 0.560 0.730 88
800113  J4   0.382 0.450 0.600 0.790 86

* Part Number includes Core


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Series 126 Unshielded - Spacewound

Series 126 is tappable. Contact the factory for more information.

Part Number * Inductance µH Minimum Q
Suggested
Core		  
No Core		  
Minimum		  
Nominal		  
Maximum		 @Nom L
@40 MHz
126101P  J2   0.051 ---- 0.054 --- 97
126102P  J2   0.066 0.068 0.073 0.078 105
126103P  J2   0.082 0.089 0.096 0.108 111
126104P  J2   0.105 0.109 0.128 0.147 117
126105P  J2   0.125 0.130 0.156 0.184 118
126106P  J2   0.142 0.148 0.182 0.216 123
126107P  J2   0.162 0.168 0.210 0.249 126
126108P  J4   0.186 0.206 0.280 0.356 132

* Part Number includes Core


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Series 800 Shielded - Closewound

Part Number * Inductance µH Minimum Q
Suggested
Core		  
No Core		  
Minimum		  
Nominal		  
Maximum		 @Nom L
@40 MHz
800202  J2   0.063 --- 0.067 --- 73
800203  J2   0.079 0.081 0.085 0.089 71
800204  J2   0.096 0.101 0.107 0.113 69
800205  J2   0.116 0.120 0.130 0.142 68
800206  J2   0.136 0.141 0.155 0.169 67
800207  J2   0.154 0.160 0.178 0.196 66
800208  J2   0.174 0.180 0.205 0.225 63
800209  J2   0.195 0.202 0.230 0.256 63
800210  J2   0.215 0.222 0.250 0.277 66
800211  J4   0.235 0.247 0.290 0.338 63
800212  J4   0.255 0.268 0.320 0.367 62
800213  J4   0.278 0.300 0.340 0.385 61

* Part Number includes Core


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Series 126 Shielded - Spacewound

Series 126 is tappable. Contact the factory for more information.

Part Number * Inductance µH Minimum Q
Suggested
Core		  
No Core		  
Minimum		  
Nominal		  
Maximum		 @Nom L
@40 MHz
126201P  J2   0.048 ---- 0.050 --- 77
126202P  J2   0.059 ---- 0.064 --- 74
126203P  J2   0.071 0.074 0.078 0.082 75
126204P  J2   0.085 0.088 0.093 0.098 73
126205P  J2   0.098 0.103 0.111 0.119 72
126206P  J2   0.112 0.117 0.127 0.137 74
126207P  J2   0.125 0.130 0.143 0.153 74
126208P  J4   0.140 0.150 0.168 0.187 70

* Part Number includes Core


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Notes - 7mm - Series 126 & 800

  1. Minimum inductance is measured with the core halfway out of the coil form.

  2. Carbonyl E & J material cores are available 1/4", 5/16", or 3/8" long. Aluminum cores are available 1/4" or 5/16" long. The electrical specifications for series 800 were made with 6-32, 0.250" long, carbonyl "J" core through 10 1/2 turns and a .375 long carbonyl "J" core 11 1/2 to 13 1/2 turns. The electrical specifications for series 126 were made with 6-32, .250" long carbonyl "J" core through 7 1/2 turns and .375" long core for 8 1/2 turns. Other core lengths and materials are available.

  3. Inductances less than 0.1µH are calculated from readings taken at 40 MHz. Inductances greater than or equal to 0.1µH are taken at the recommended "Q" meter frequency. All inductances include Standex test fixture number 4292G. Fixture inductance is approximately .040µH.

  4. Series 800 is "closewound". Series 126 is "spacewound".

  5. Electrical winding "tap" is available on the 126 series. Contact the factory for details.

  6. The coil may be molded in various positions. Contact the factory for details.

  7. The coil may be installed in the shield can in alternate positions. Contact the factory for details.

  8. Coil form material for both series is polypropylene. Series 126 is also available in higher temperature plastic.

  9. These coils may be tuned with Standex tuning wrench 996.

  10. Series 800 is 44 TPI. The O.D. of the windings is .208. distance from the mounting surface to the first turn is .06".

  11. Series 126 is 28 TPI. The O.D. of the windings is .208. Distance from the mounting surface to the first turn is .07".

  12. Standex specifications are subject to change without notice.