1-800-RFPARTS (1-800-737-2787) 1-760-744-0700 (USA) ORDERS: rfp@rfparts.com 435 S PACIFIC ST SAN MARCOS, CA 92078

3-500ZG Transmitting Tubes

The RF Parts 3-500ZG™ is a compact power triode intended to be used as a zero-bias Class AB2 amplifier in audio or radio-frequency applications. Operation with zero grid bias simplifiers assocated circuitry by eliminating the bias supply. In addition, grounded-grid operation is attractive since power gain as high as twenty can be obtained with the 3-500ZG™ in a cathode-driven circuit.

3-400Z and 3-500Z Tube Comparison

FULLY 100% TESTED AND "BURNED IN" AT THE RF PARTS FACILITY IN SAN MARCOS, CALIFORNIA.  SO, JUST "PLUG AND PLAY".

Plate caps, heat radiators and clips

RF Parts offers plate caps, heat radiators and clips for the 3-500Z and the 3-400Z

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  1. 275 Tube Socket, Ceramic, 5 Pin, 3-500Z, 4-400A, China

    275 Tube Socket, Ceramic, 5 Pin, 3-500Z, 4-400A, China

    Tube Socket, Ceramic, 5 pin, 3-500Z, 3-500ZG, 4-400A, 4-400C, 4-125A

    Made in China

    SKU: 275-RFP


  2. 3-400Z / 8163 Eimac Transmitting Tube  (NOS)

    3-400Z / 8163 Eimac Transmitting Tube (NOS)

    $329.00

    Transmitting Tube  8163 / 3-400Z
    New Old Stock * No longer available for export
    MFR: Eimac
    SKU: 3-400Z

    Made in the USA
  3. 3-500ZG, 3-500Z RF Parts Transmit Tube  Matched Set of Three (3)

    3-500ZG, 3-500Z RF Parts Transmit Tube Matched Set of Three (3)

    $749.91

    Out of stock

    The NEW, RF Parts Company 3-500ZG and Taylor Tubes 3-500ZG tubes are the most rugged tubes of this type available.  They are an improved version of the 3-500ZG offered by RF Parts Company, from 1993 to 2019.  This newly revised version has had a failure rate of less than 0.05% during the three years that we have been testing, matching and selling them.

    These tubes are a Heavy Duty Graphite Anode version of the original Eimac 3-500Z, and it has a stronger Anode stem-support to add to the tube's ruggedness and stability.  The Graphite Anode, Grid, and Filament are virtually the same as the Graphite version last offered by Eimac, and is interchangeable with this vastly improved transmit tube.

    MFR: China

    SKU: 3-500ZG-RFP-M3

    Our Six Month Warranty covers manufacturing defects in workmanship and material which includes the Anode, Filament, Grid and Glass.  Please send an eBay Message to RF Parts Company with any issues, before you return a tube(s).  The buyers' shipping charges shall be refunded if a returned tube(s) is replaced under warranty.

  4. 3-500ZG, 3-500Z RF Parts Transmit Tube One Year Warranty Matched Quad (4)

    3-500ZG, 3-500Z RF Parts Transmit Tube One Year Warranty Matched Quad (4)

    $999.91

    Out of stock

    The NEW, RF Parts Company 3-500ZG and Taylor Tubes 3-500ZG tubes are the most rugged tubes of this type available.  They are an improved version of the 3-500ZG offered by RF Parts Company, from 1993 to 2019.  This newly revised version has had a failure rate of less than 0.05% during the three years that we have been testing, matching and selling them.

    These tubes are a Heavy Duty Graphite Anode version of the original Eimac 3-500Z, and it has a stronger Anode stem-support to add to the tube's ruggedness and stability.  The Graphite Anode, Grid, and Filament are virtually the same as the Graphite version last offered by Eimac, and is interchangeable with this vastly improved transmit tube.

    MFR: China

    SKU: 3-500ZG-RFP-MQ

    Our Six Month Warranty covers manufacturing defects in workmanship and material which includes the Anode, Filament, Grid and Glass.  Please send an eBay Message to RF Parts Company with any issues, before you return a tube(s).  The buyers' shipping charges shall be refunded if a returned tube(s) is replaced under warranty.

  5. 3-500ZG RF Parts Transmit Tube One Year Warranty Matched Sextuplet (6)

    3-500ZG RF Parts Transmit Tube One Year Warranty Matched Sextuplet (6)

    $1,499.91

    Out of stock

    The NEW, RF Parts Company 3-500ZG and Taylor Tubes 3-500ZG tubes are the most rugged tubes of this type available.  They are an improved version of the 3-500ZG offered by RF Parts Company, from 1993 to 2019.  This newly revised version has had a failure rate of less than 0.05% during the three years that we have been testing, matching and selling them.

    These tubes are a Heavy Duty Graphite Anode version of the original Eimac 3-500Z, and it has a stronger Anode stem-support to add to the tube's ruggedness and stability.  The Graphite Anode, Grid, and Filament are virtually the same as the Graphite version last offered by Eimac, and is interchangeable with this vastly improved transmit tube.

    MFR: China
    SKU: 3-500ZG-RFP-M6

    Our Six Month Warranty covers manufacturing defects in workmanship and material which includes the Anode, Filament, Grid and Glass.  Please send an eBay Message to RF Parts Company with any issues, before you return a tube(s).  The buyers' shipping charges shall be refunded if a returned tube(s) is replaced under warranty.

5 Item(s)