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Plate Caps

Plate Caps, Heat Radiators and Clips

RF Parts offers plate caps, heat radiators and clips for many popular tubes. This includes popular tubes, such as the 3-400Z/3-500Z.

The following is a list of plate caps and heat radiators and their matching tubes.

Heat Radiators and Plate ClipsMatching Tubes
HR2 Heat radiator, tube plate cap, finned For tubes with .0625" pin.
HR3 Heat radiator, tube plate cap, Eimac Works with tubes with 0.72" Plate terminal
HR4 Heat radiator, tube plate cap, finned For tubes with .1015 " dia. pin
HR6-SHORT Plate Cap Heat radiator, short version 3-400Z/3-500Z & ZG, 4-400A short version 3-400Z/3-500Z & ZG, 4-400A
HR6-TALL Plate Cap Finned plate cap 3-500/4-400 3-500/4-400
HR7 Plate Cap / Anode Heat Radiator for 304TL or 304TH 304TL or 304TH
HR8 Plate cap, Finned Aluminum, Fits on 3-1000Z / 4-1000A / 4PR1000A/ 833 3-1000Z / 4-1000A / 4PR1000A/ 833
PC509 Plate cap, 1/4" for EL509 / EL519 / 6KG6 EL509 / EL519 / 6KG6
PLCAP1 Ceramic Plate cap for Tubes: 811A / 572B / 866 / 833, 811A / 572B / 866 / 833
PLCAP2 Ceramic Plate cap for tubes with plate diameter of 0.35": 6146B / 6146W / 6LQ6 / 8950 tubes, tubes with plate diameter of 0.35": 6146B / 6146W / 6LQ6 / 8950 tubes
PLCAP3 Ceramic Plate cap for tubes with plate diameter of 0.25" tubes with plate diameter of 0.25"
HR7 Plate Cap / Anode Heat Radiator for 304TL or 304TH, Eimac (NOS) 304TL or 304TH
HR6-1 Plate Cap Finned, 3-500Z & 4-400A 3-500Z & 4-400A

The following is a list of clips and their matching tubes.

ClipsMatching Tubes
AC1 Anode clip for 4cx150a-400a O.565" /11 mm typ. diameter (Default) 4cx150a-400a O.565" /11 mm typ. diameter
AC2 Anode Clip for 4CX800A / 4CX1600B / 3CX3000A7, etc 4CX800A / 4CX1600B / 3CX3000A7, etc
AC3 Anode Clip for Large 3CX & 4CX tubes thru 15000 Large 3CX & 4CX tubes thru 15000
AC4 Anode Clip for 833A & C tubes or with 0.45 diameter plate cap 833A & C tubes or with 0.45 diameter plate cap
AC5 Anode Clip, Plate/Grid, 0.57", 4CX250B, 4CX350A Plate/Grid, 0.57", 4CX250B, 4CX350A
SPRCLP Spring clip for smaller plate caps 0.24-0.25" Dia smaller plate caps 0.24-0.25" Dia
SPRCLP-L Spring clip, large. fits 572B, 810, 866, 813 572B, 810, 866, 813

List  Grid 

per page
Set Descending Direction

  1. HR-3 Eimac Heat-Dissipating Connector Top Cap (NOS)

    HR-3 Eimac Heat-Dissipating Connector Top Cap (NOS)

    $14.91

    New Old Stock * No longer available for export
    MFR: Eimac, USA
    SKU: HR3-Eimac

    Made in the USA
  2. Spring Clip for Smaller Plate Caps 0.24-0.25" Diameter

    Spring Clip for Smaller Plate Caps 0.24-0.25" Diameter

    $0.91 As low as: $0.82

    Spring clip for older sweep tubes with small plate cap Diameter of 0.24 - 0.25"

    SKU: SPRCLP

    NOTE: Please check your tubes to make sure diameter fits.

     

  3. PLCAP2 Ceramic Plate cap for tubes with plate diameter of 0.35": 6146B / 6146W / 6LQ6 / 6LF6 / 8950 tubes

    PLCAP2 Ceramic Plate cap for tubes with plate diameter of 0.35": 6146B / 6146W / 6LQ6 / 6LF6 / 8950 tubes

    $3.91

    PLCAP2  Ceramic Plate cap for popular tubes with plate diameter of approx. 0.35": 

    Fits: 6146B, 6146W, 6LQ6, 8950 tubes and more.

    MFR: China
    SKU: PLCAP2

  4. PLCAP1 Ceramic Plate Cap For 811A , 572B, 866, 813, and 833 Tubes

    PLCAP1 Ceramic Plate Cap For 811A , 572B, 866, 813, and 833 Tubes

    $6.91

    Ceramic Plate cap for Tubes with 0.55" Plate diameter:  811A / 572B / 866 / 813 / 833

    Made in China

    SKU: PLCAP1


  5. PC509 Millen Porcelain Plate Cap (36004) 1/4" for EL509/EL519/6KG6 (NOS)

    PC509 Millen Porcelain Plate Cap (36004) 1/4" for EL509/EL519/6KG6 (NOS)

    $11.91

    These are from OEM Bulk Packaging, not the red Millen boxes.

    New Old Stock * No longer available for export
    MFR: James Millen Manufacturing Company
    SKU: PC509

    Made in the USA

  6. HR-8 RF Parts Heat-Dissipating Connector Top Cap

    HR-8 RF Parts Heat-Dissipating Connector Top Cap

    $45.91

    Fits 3-1000Z, 4-1000A, 4PR1000A and 833 tubes
    MFR: RF Parts
    SKU: HR-8

    Made in the USA

  7. HR-7 Heat-Dissipating Connector Top Cap for 304TL or 304TH

    HR-7 Heat-Dissipating Connector Top Cap for 304TL or 304TH

    $45.91

    Replacement Aluminum Plate Cap / Anode Heat Radiator for 304TL, 304TH, or tubes having 0.126 diameter anode stem. New. Diameter: 1 3/8" Height: 1 3/8" Hole Size: 0.127.  Heat dissipating connectors are used to make electrical connections to the plate and grid terminals of Transmitting tubes, and at same time, provide efficient heat transfer from the tube element and glass seal to the air.

    New Old Stock * No longer availabale for export
    SKU: HR-7

     

    Made in the USA

  8. HR-6 Heat-Dissipating Connector Top Cap, 0.35" HIgh

    HR-6 Heat-Dissipating Connector Top Cap, 0.35" HIgh

    $6.91 As low as: $5.95

    This plate cap will work on Eimac tubes and the 3-500ZG / 3-500Z.  Comes with set screws
    Size:  1" Diameter x 0.35" High
    MFR: RF Parts Company
    SKU: HR6-SHORT

    Made in the USA
  9. FC4 Union Fuse Clip 30 Amps 250V 0.50 Inch Diameter (Pull)

    FC4 Union Fuse Clip 30 Amps 250V 0.50 Inch Diameter (Pull)

    $5.95

    • Inside Diameter: 0.50 in. / 12.7 mm.

    Used * No longer availale for export
    MFR: Union
    SKU: FC4

  10. Vintage Millen Ceramic Plate Cap For 6146B / 6146W / 6LQ6 / 6LF6 / 8950 (NOS)

    Vintage Millen Ceramic Plate Cap For 6146B / 6146W / 6LQ6 / 6LF6 / 8950 (NOS)

    $2.91

    • Size: 1-1/8" long x 5/8" wide x 7/16" High
    • Internal  Diameter: 3/8"
    • Tested and verified

    Used
    MFR: Millen Manufacturing Company
    SKU: PLCAP2-MILLEN-P

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RF Parts Company

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1-800-RFPARTS (1-800-737-2787)

1-760-744-0700, #1

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