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How To Specify Crystal Filters

Frequently Asked Questions

  1. Do you have a company brochure?
    1. Network Sciences brochure is available upon request.

  2. What are your unique design and production capabilities?
    1. Network Sciences designs and manufactures crystal & LC filters for military & commercial RF and microwave applications from 1 KHz to 2.5 GHz. Filters of all types (polynomial, general synthesis, image parameter, etc.), delay & amplitude equalized, phase matched and in all package configurations.

  3. What capital investments have you made recently?
    1. Associate General Laboratories cold weld hermetic sealing machine with high temperature vacuum bake-out and nitrogen dry box with vacuum seal process capabilities for ultra clean cold weld crystal enclosures.
    2. Saunders & Associates Model 5250DS computer controlled crystal precision frequency adjustment system.
    3. Saunders & Associates Model 4220A temperature & parameter crystal test system.
    4. Transat Model ATP-2 two pole MCF frequency adjustment system.
    5. Hewlett Packard Model 5100A network analyzer.
    6. Hewlett Packard Model 8752C network analyzer with Computer control for filter testing.
    7. Hewlett Packard workstation for printed circuit board design & component lay-out.

  4. What are your plant and process certifications?
    1. Mil-I-45208
    2. Mil-I-454
    3. Mil-Std-2000A

  5. Describe in detail any special process technologies currently being used in manufacturing.
    1. Chemically polishing of quartz resonators plates for producing high frequency fundamental & 3rd overtone filter crystals.
    2. Clean & precision deposition of thin films of chromium, aluminum, silver, & gold for crystal frequency adjustment.
      1. Cold weld crystal enclosures for ultra-clean crystal enclosure.
      2. Clean room processing of crystals.

  6. What improvements have been implemented recently to improve productivity, reduce costs and improve quality.
    1. Employee training
    2. 90% of our capital equipment purchases were made with the primary goal of product cost reduction, improved quality and more uniform product parameters.
    3. Reject analysis with corresponding design/process review to reduce rejects/scrap and improve product yields and quality.

  7. Are any of your operators certified to Mil-Std-2000A?
    1. No, however we have supplied filters & discriminators to military programs where the soldering was to Mil-Std- 2000A and audited by local DCAS inspection.

  8. How many employees do you have?
    1. Network Sciences currently has 20 employees. Including 3 design engineers, and 1 process-production engineer.

  9. Is your company Team or Matrix organized?
    1. Team organized.

  10. How many years has Network Sciences been in business?
    1. Network Sciences was founded in 1970.

  11. What percentage of our business is military vs. commercial?
    1. We are 60% military & 40% commercial.


  12. How much testing is done in-house?
    1. We 100% test all electrical specifications on all products @ 25 C and sample test mechanical specifications.
    2. We sample test as a minimum all electrical specifications at the operating temperature extremes using Mil-Std 105 defined sampling.
    3. All environmental testing per Mil-Std 202 not performed at NS is done locally at an NBS certified testing facility as required by our customer.

  13. Is it possible to obtain a copy of your Quality Manual?
    1. Yes. Call or email us to receive a copy.

  14. What type of MRP system do you use?
    1. A purchased data based software program that has been customized to meet our needs. The initial entry is our customers purchase order, P/N, quantity, price, delivery, Network Sciences P/N & job order number.

  15. How much of your manufacturing is subcontracted?
    1. Some filter & discriminator package fabrication.
    2. All package plating.
    3. Crystal resonators below 1.4 MHz.
    4. Some outside contract assembly for volume filters.

  16. What is the size of your facility?
    1. We have single 8000 sq.ft. facility located at 3382 W. Osborn Rd., Phoenix AZ. 85017-4810.
    2. Our CAGE Code is 1HP10.
    3. Our Duns number is 10-634-6646.
    4. Our telephone number is 602-258-8095.
    5. Our facsimile number is 602-278-7033.
    6. Our e-mail is info@networksciences.com

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