Non-magnetic Trimmer Capacitors Voltronics Corporation has produced non-magnetic CRYOGENIC TRIMMER CAPACITORS trimmer capacitors for over 25 years. The increasing Most of these non-magnetic trimmer capacitors can applications have impelled the company to mount an O be used and even tuned at temperatures down to 4 active, continuing engineering effort in this field. K. They are specially made and have been used in many NMR applications. We can design parts which NON-MAGNETIC PROPERTIES will work for a variety of special situations. Consult The severe requirement for non-magnetic properties is the factory with your requirements. such that in a 14,000 Gauss field the capacitors must not distort the useable field by more than one part per To order parts for cryogenic applications, add K to 600 million. To achieve this, no materials or platings the part number, i.e., NMTM120CK. exhibiting measurable magnetism, such as stainless steel or nickel, are used. Commercial brass is un- We cant test at these temperatures. Each application -6 acceptable. Typical magnetic susceptibility is 40 x 10 is different, but consult us if there is a problem which CGS units. Voltronics strict traceability system and its may have already been solved. testing for minute magnetism insure this essential parameter. SPLIT STATOR AND DIFFERENTIAL STYLES SEAL Non-magnetic versions of these styles are available. Most of the capacitors are internally sealed so that they Consult the factory for detailed specifications. can withstand immersion in flux and cleaning solvents without leaking. SPECIAL DESIGNS Most of the parts shown in this catalog were developed for a specific customer application. Many other mounting configurations are available. Call the factory to discuss your special needs. 100 FORD ROAD DENVILLE, NEW JERSEY 07834 PHONE: 973-586-8585 FAX: 973-586-3404 SAPPHIRE Non-magnetic Trimmer Capacitors FIG. 1 FIG. 2 Optional Configurations EXTENDED SHAFT ADD E TO TYPE DESIGNATION (ie., NMP8AE) FIG. 3 FIG. 4 FIG. 5 IN 0.002 0.005 0.008 0.010 0.014 0.015 0.018 0.020 0.025 0.034 0.036 0.040 0.045 0.047 0.056 0.060 0.070 0.075 0.082 0.090 0.093 0.094 0.100 0.110 0.118 0.125 0.130 0.140 0.148 0.150 0.160 0.183 0.190 0.230 0.240 0.245 0.250 0.329 0.495 MM 0.05 0.13 0.20 0.25 0.36 0.38 0.46 0.51 0.64 0.86 0.91 1.02 1.14 1.19 1.42 1.52 1.78 1.91 2.08 2.29 2.36 2.39 2.54 2.79 3.00 3.18 3.30 3.56 3.76 3.81 4.06 4.65 4.83 5.84 6.10 6.22 6.35 8.36 12.57 Capacitance Toleranes (where not specified) + .016 - Range (pF) From To Q (Min.) B C+ D+ E+ H+ -- - - Type Fig. Below Above 250 MHz A (max) DIA005 .010 .010 F G .005 NMP3A 1 0.6 2.5 4,000 .240 - .118 - - - - - NMP5A 1 0.6 4.5 3,000 .329 - .118 - - - - - NMP8A 1 0.8 7.0 1,500 .495 - .118 - - - - - NMP12A 1 1.0 12.0 1,500 .495 - .118 - - - - - NMP3B 2 0.6 2.5 4,000 .240 .140 .118 .082 .014 - - - NMP5B 2 0.6 4.5 3,000 .329 .140 .118 .130 .034 - - - NMP8B 2 0.8 7.0 1,500 .495 .140 .118 .250 .036 - - - NMP12B 2 1.0 12.0 1,500 .495 .140 .118 .250 .036 - - - NMP3F 3 0.6 2.5 4,000 .240 .140 .118 .090 - .110 .025 .04 NMP5F 3 0.6 4.5 3,000 .329 .140 .118 .160 - .110 .025 .04 NMP8F 3 0.8 7.0 1,500 .495 .140 .118 .250 - .110 .025 .04 NMP12F 3 1.0 12.0 1,500 .495 .140 .118 .250 - .110 .025 .04 - NMP3J 4 0.6 2.5 4,000 .240 .140 .118 .082 .014 .070 .160 - NMP5J 4 0.6 4.5 3,000 .329 .140 .118 .130 .034 .070 .160 - NMP8J 4 0.8 7.0 1,500 .495 .140 .118 .250 .036 .070 .160 - NMP12J 4 1.0 12.0 1,500 .495 .140 .118 .250 .036 .070 .160 - NMP3M 5 0.6 2.5 4,000 .240 - .118 - - - .125 - NMP5M 5 0.6 4.5 3,000 .329 - .118 - - - .160 - NMP8M 5 0.8 7.0 1,500 .495 - .118 - - - .230 NOTE: For diameter and length dimensions on figures 2-5, see figure 1. 100 FORD ROAD DENVILLE, NEW JERSEY 07834 PHONE: 973-586-8585 FAX: 973-586-3404