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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 Ascending Direction
  1. 926H-138 Birtcher Anode Clamp for 4CX250B, 4X150, 4CX150, 4CX350 (Pull)

    926H-138 Birtcher Anode Clamp for 4CX250B, 4X150, 4CX150, 4CX350 (Pull)

    $29.90

    926H-138 Birtcher Anode Clamp for 4CX250B, 4X150, 4CX150, 4CX350 (Pull)

    Used
    MFR: Birtcher
    SKU: 926H-138-P

  2. 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


  3. PLCAP3N National Ceramic Plate Cap for Tubes with Plate Diameter of 1/4" (Pull)

    PLCAP3N National Ceramic Plate Cap for Tubes with Plate Diameter of 1/4" (Pull)

    $6.91

    This plate cap is sized to fit the popular 6146B / 6146W / 6LQ6 / 8950 / etc style plate cap of approximately 1/4" diameter. 

    • Size: 1-1/16" long x 9/16" wide x  17/32" High
    • Internal spring opening: 1/4" diameter

    Used * No longer availabe for export
    MFR: National Company
    SKU: PLCAP3N-P

    Made in the USA
  4. Vintage Millen Ceramic Plate Cap For 811A , 572B, 866, and 833 Tubes (NOS)

    Vintage Millen Ceramic Plate Cap For 811A , 572B, 866, and 833 Tubes (NOS)

    $11.91

    This plate cap is sized to fit the popular 811A / 572B style plate cap of approximately 9/16" diameter. 

    • Size: 1-1/2" long x 13/16" wide x  3/4" High
    • Internal  Diameter:  9/16"
    • Tested and verified

    New Old Stock * No longer available fo reexport
    MFR: Millen Manufacturing Company
    SKU: PLCAP4-MILLEN

  5. Vintage National Ceramic Plate Cap For 811A , 572B, 866, 813, and 833 Tubes (Pull)

    Vintage National Ceramic Plate Cap For 811A , 572B, 866, 813, and 833 Tubes (Pull)

    $8.91

    This plate cap is sized to fit the popular 811A / 572B style plate cap of approximately 9/16" diameter. 

    • Size: 1-1/2" long x 13/16" wide x  3/4" High
    • Internal  Diameter:  9/16"
    • Tested and verified

    MFR: National Company
    SKU: PLCAP4-P


  6. HR-7 Heat-Dissipating Connector Top Cap (Pull)

    HR-7 Heat-Dissipating Connector Top Cap (Pull)

    $23.91

    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.

    Used * No longer availabale for export
    MFR: Generic Brand
    SKU: HR-7-GEN-P

    Made in the USA

  7. HR-8 Eimac Heat-Dissipating Connector Top Cap (NOS)

    HR-8 Eimac Heat-Dissipating Connector Top Cap (NOS)

    $38.91

    New Old Stock * No longer available for export
    Fits 3-1000Z, 4-1000A, 4PR1000A and 833 tubes
    MFR: Eimac
    SKU: HR-8-EI-NOS

    Made in the USA
  8. HR-1 Eimac Heat-Dissipating Connector Top Cap (NOS)

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

    $9.91

    For 2-25A  and 3C24 tubes and tubes with a .052" pin.
    New Old Stock * No longer available for export
    MFR: Eimac
    SKU: HR-1-EI

  9. HR-6 Eimac Heat-Dissipating Connector Top Cap (Pull)

    HR-6 Eimac Heat-Dissipating Connector Top Cap (Pull)

    $13.91

    Will fit  3-400Z, 3-500Z & ZG, 4-400A, & 4-400C
    Size:  0.88" High x 0.82" Diameter 
    0.367" Hole Diameter
    Used * No longer available for export
    MFR: EIMAC
    SKU: HR-6-P

  10. PLCAP3 Ceramic Plate cap for tubes with plate diameter of 0.25"

    PLCAP3 Ceramic Plate cap for tubes with plate diameter of 0.25"

    $1.91 As low as: $1.72

    Ceramic Plate cap for tubes with plate diameter of 0.25",

    MFR: China

    SKU: PLCAP3 

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RF Parts Company

435 S Pacific St
San Marcos, CA, 92078, USA

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

1-760-744-0700, #1

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