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Here you will find a large selection of new and used General Radio GR900 50-Ohm Adaptors listed at special prices. Although some items match several categories, all of them are listed here, no matter what category or subcategory they have been placed in. You may sort the listings by price. You also have the option of showing only ads that have been posted in the last 24 hours.

General Radio GR900 50-Ohm Adaptors () Main Features and Specifications

Product Specs

  • Status -

The availability of precision adaptors from the GR900® connectors to other popular coaxial connectors means that the user of GR900 equipped instruments can convert to other series and still retain precision performance. For example, a 900-LB Precision Slotted Line equipped with a 900-QNJ or 900-QNP adaptor becomes a type N slotted line with an overall residual SWR (line plus adaptor) of only 1.02 at 3 GHz. Conversely, users of instruments equipped with SMA, TNC, N, C, and GR874® connectors can, by means of adaptors, take advantage of the precision offered by GR900 tuners, airline standards, terminations, and other elements.

The 50-Ohm Precision Adaptor Kit contains the most commonly used GR900 precision adaptors including one each of the jack and plug versions of adaptors to BNC, C, N, SC, SMA, and TNC, as fell as adaptors to Amphenol APC-7, Precifix AA, and GR874® connectors.

  • 900-9451 is the catalog number for the precision adaptor set
  • 900-9450 is the catalog number for the mahogany storage case with recessed foam inserts

The Precision Adaptors to BNC include a version with a BNC jack and a version with a BNC plug. Both use a GR900 precision connector on the other end.

  • 900-QBJ is a precision adaptor to BNC with jack, 900-QBP is a precision adaptor to BNC with plug
  • Frequency: DC to 8.5 GHz
  • SWR: <(1.005 + 0.015 fGHz) to 1 GHz, <(1.015 +0.005 fGHz) to 8.5 GHz
  • Input voltage: Up to 500 Vpeak

The Precision Adaptors to C include a version with a type C jack and a version with a type C plug. Both use a GR900 precision connector on the other end.

  • 900-QCJ is a precision adaptorwith a C jack, 900-QCP is a precision adaptor with a C plug
  • Frequency: DC to 8.5 GHz
  • SWR: <(1.005 + 0.015 fGHz) to 1 GHz, <(1.015 +0.005 fGHz) to 8.5 GHz
  • Input voltage: Up to 1000 Vpeak

The Precision Adaptors to N include a version with a type N jack and a version with a type N plug. Both use a GR900 precision connector on the other end.

  • 900-QNJ is a precision adaptor with N jack, 900-QNP is a precision adaptor with N plug
  • Frequency: DC to 8.5 GHz
  • SWR: <(1.004 + 0.004 fGHz) to 8.5 GHz
  • Input voltage: Up to 1000 Vpeak

The Precision Adaptors to TNC include a version with a TNC jack and a version with a TNC plug. Both use a GR900 precision connector on the other end.

  • 900-QTNJ is a precision adaptor with TNC jack, 900-QTNP is a precision adaptor with TNC plug
  • Frequency: DC to 8.5 GHz
  • SWR: <(1.005 + 0.015 fGHz) to 1 GHz, <(1.015 +0.005 fGHz) to 8.5 GHz
  • Input voltage: Up to 500 Vpeak

The Precision Adaptors to SMA include a version with an SMA jack and a version with an SMA plug. Both use a GR900 precision connector on the other end.

  • 900-QMMJ is a precision adaptor with SMA jack, 900-QMMP is a precision adaptor with SMA plug
  • Frequency: DC to 8.5 GHz
  • SWR: <(1.005 + 0.025 fGHz) to 1 GHz, <(1.022 +0.008 fGHz) to 8.5 GHz

The Precision Adaptors to SC include a version with an SC jack and a version with an SC plug. Both use a GR900 precision connector on the other end.

  • 900-QSCJ is a precision adaptor with SC jack, 900-QSCP is a precision adaptor with SC plug
  • Frequency: DC to 8.5 GHz
  • SWR: <(1.005 + 0.015 fGHz) to 1 GHz, <(1.015 +0.005 fGHz) to 8.5 GHz
  • Input voltage: Up to 1000 Vpeak

The Precision Adaptors to 7-mm Precision include an Amphenol APC-7 or R&S 7-mm connector on one end and a GR900 precision connector on the other.

  • 900-QAP7 is a precision adaptor with APC-7 connector, 900-QPF7 is a precision adaptor R&S 7 mm connector
  • Frequency: DC to 8.5 GHz
  • SWR: <(1.003 + 0.003 fGHz) to 8.5 GHz
  • Input voltage: Up to 1000 Vpeak

The Precision Adaptors to GR874® connector consists of a locking GR874 connector on one end and a GR900 precision connector on the other.

  • 900-Q874 is a precision adaptor with locking GR874 connector
  • Frequency: DC to 8.5 GHz
  • SWR: <(1.00 + 0.015 fGHz) to 1 GHz, <(1.010 + 0.005 fGHz) to 8.5 GHz
  • Input voltage: Up to 1500 Vpeak

The Precision Adaptor to Binding Posts consists of one convertible version that adapts binding posts (spaced on 0.75 to 1 inch centers) to GR900 connector and (after a simple mechanical modification) adapts GR900 connector to binding posts. Particularly useful for converting unknown terminals of bridges.

  • 900-Q9 is a precision adaptor to binding posts
  • Residual impedance
    • When binding posts are adapted to GR900, ≈3.55 pF and ≈4.8 nH are added to terminals
    • When GR900 is adapted to binding posts, ≈5.2 pF and ≈11 nH are added at base and ≈20 nH at top of binding posts