schematic_diagrams Resistors for Tube Radios and Tube Electronics

JustRadios sells high quality resistors and capacitors for tube radios and tube based electronics. We carry 1/2 watt, 1 watt, 2 watt, 5 watt and 10 watt resistors for tube radios, amplifiers, TVs, HAM gear, juke-boxes, etc. Our resistor line includes carbon composition resistors, metal oxide resistors, metal film resistors, carbon film resistors, metal glaze resistors and power resistors (wire wound and metal oxide). All resistors have been especially chosen for tube electronic circuits. All resistors are high voltage "normal body size" type. We do not stock cheap low voltage "small body type" resistors. For added safety, all of our metal oxide resistors, carbon film resistors, metal glaze resistors and power resistors are flame proof type. All resistors (including the carbon composition type) are brand new poduction. We do not carry NOS (New Old Stock) resistors. We sell only high quality, new "factory fresh" resistors.

Are all resistors created equal? When it comes to resistors for tube radios and tube based electronics, all resistors are not created equal. Unlike transistor based electronics, tube electronics (tube radios, tube amplifiers, tube televisions, tube jukeboxes, tube ham gear etc.) require resistors that can handle high voltages and withstand very high temperatures. Resistors that are suitable for transistor radios may not be suitable for use in your tube electronics. When selecting resistors for tube based electronics....in addition to getting the correct ohm value and wattage.....it is important that the resistors have a voltage rating that is high enough. The original carbon composition resistors in your tube radio most likely had a working voltage rating of 350 Volts. When replacing old carbon composition resistors, it is important that they be replaced with resistors that have a working voltage equal to or higher than the original resistors. If lower voltage resistors are used....there is the risk of failure. Many modern day 1/2W resistors made of metal oxide, carbon film, metal film, etc are rated at "less" than the required 350 volts. Also, almost all types of resistors manufactured now-a-days are manufactured with either "small" size bodies or "normal" size bodies. Cheaper "small" body type resistors have a lower working voltage than their "normal" body size counterpart. The "small" body type resistors (which are almost always rated at less than 350 volts) are fine for most transistor radios....but they can not handle 350V. "Small" body resistors are way cheaper (half the price) of "normal" body type....but as the saying goes..."you get what you pay for". If you are restoring tube based electronics "small" body type resistors should be avoided. Many traditionalists like to replace their old off-spec carbon composition resistors with new carbon composition resistors. If you replace old 1/2 watt carbon comp resistors with modern day resistors, be sure that they are "normal" body type and are rated at 350 volts or higher. To "play it safe" many enthusiasts that repair/restore/build tube radios and electronics replace 1/2W carbon composition resistors with modern day 1 watt "flame proof" resistors....a practical choice.

In addition to the body size dilemma, the length of resistors has recently changed. Almost all manufacturers are now making resistors shorter than they used to. Shorter resistors are now the “new standard”. A few manufacturers will still make resistors with the longer leads of yesterday (but are special order at extra cost). As the saying goes …”you get what you pay for”. When ordering resistors make sure your 1 Watt resistors are over 2 ½ inches and 2 Watt resistors are over 3 inches.
Free Delivery Free Airmail Shipping to USA and Canada for all Resistor KITS and Capacitor KITS

carbon_composition_resistor metal_oxide_capacitors power_resistors

Resistors for Tube Radios & Electronics

On sale: High quality carbon composition resistors, metal oxide resistors, metal glaze resistors, carbon film resistors and power resistors for vintage tube radios & electronics. All resistors have high voltage ratings, normal size bodies and long axial solder plated copper lead wire leads for easy "under chassis" installation. For added safety, all metal oxide, metal glaze, carbon film and power resistors are flame proof. Our Resistor Product Line has been specifically chosen for tube radio, amp, TV, Hi-Fi, juke-box, etc applications.

For the traditionalist we carry "classic" carbon composition resistors. Our new production 1 watt carbon composition resistors have 10% tolerance while our new production 1/2 watt carbon composition resistors are available at both 5% and 10% tolerance.

We also carry a full line of high quality, flame proof 1W & 2W metal oxide and carbon film resistors. These highly stable, flame proof resistors are a practical, reliable and very affordable alternative to 1/2W watt carbon composition resistors.

For precision applications we carry 1/2W 1% precision metal film resistors.

For power supplies, we carry 5W and 10W wire wound and metal oxide power resistors. These are available from as low a 0.5 ohms all the way up to 50k ohms.

Our metal oxide, metal film, metal glaze, carbon film and carbon composition resistors are sold in economical 5 packs. Our power resistors are priced and sold individually. See our Price List and Order Form.
Also available are resistor kits which contain the most often needed sizes of resistors. These Resistor Kits offer $ savings over buying resistors individually and you get free shipping.

All resistors are highest quality, brand new, ISO certified and 100% RoHS compliant.

We do not stock short leaded/"small" bodied resistors. We sell only high voltage "normal" bodied resistors with long leads.

How to Order Resistors

To order "online":

Use our Resistor Shopping Cart

or..... much faster than the Shopping Cart "if you are ordering many different sizes and types" of resistors and have Excel on your computer. Use our Excel orderform. Just email us a completed copy of the EXCEL Spreadsheet Order-Form and pay "online" via Credit Card or PayPal. All major credit cards are accepted. paypal_not_required

To order resistors by mail use our EXCEL Spreadsheet Order-Form or print and complete a Resistor Order Form if you do not use excel. Mail it with payment (MO, PO or check) payable to Dave Cantelon, 6 Ferncrest Gate, Scarborough, Ontario, Canada, M1W1C2.

All prices are in US $'s. Fixed world-wide airmail shipping for orders under $100 is just $7.90. Free worldwide airmail shipping for all orders over $100.00.
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10% discount for all orders over $149.99 (excluding capacitor and resistor kits).


We are glad to ship world-wide.
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About JustRadios * Radio Schematics * Capacitors

How to Order * Terms of Sale * Shipping Info

**** Resistors for Tube based Electronics- PRODUCT LINE SUMMARY ****

Resistor Type and Construction

Resistor Features and Specifications

Premium
RCD Carbon Composition Resistors
5% Tolerance

RCD_carbon_composition_resistor

RCD_carbon_composition_resistor

RCD of New Hampshire, USA has been committed to quality for over 40 years. RCD Headquarters and Manufacturing Facility are at Manchester, New Hampshire, USA. Additional RCD products are produced in Europe, the Caribbean and Asia. These brand new factory fresh RCD carbon composition resistors feature rugged hot molded construction. The resistance material, insulation material and lead wires are all hot molded together at the same time into one solid integrated resister. The result of this hot molded construction is a resistor that is mechanically strong without any cracks or crevices that could adversely affect performance. Total length of each resistor is 60mm (2 1/2") with body size 3.56mm by 9.53mm. 100% non-inductive construction for pure resistance.



Ohm sizes available and $ Price List
Carbon Composition Resistor Kits.

  • Wattage: Available at the popular 1/2 watt rating.
  • Ohms: 10 ohms to 22M ohms (90 sizes).
  • Tolerance: +/- 5%
  • Rugged molded insulation for high resistor/dielectric strength.
  • Operating Temperature Range: -55C to +150C ( this is a full 25 degrees better/higher than most carbon comp resistors, resulting in greater reliability and longer life in high operating temperature environments)
  • Working Voltage: 350V.
  • Overload Voltage: 700 volts
  • Peak Pulse Voltage: 10KV
  • High surge/high pulse capability.
  • "Classic" vintage resistor appearance and that tube radio sound of yesteryear.
  • Applications: Tube electronics, snubber circuits, lightning surge, grounding resistors, RFI suppression, dummy loads, etc.
  • ISO 9001:2000 certified and 100% RoHS compliant.
    .

KAMAYA OHM
Carbon Composition Resistors
10% Tolerance

KAMAYA_OHM

"The Classic Resistor" for Tube Radios & Electronics

carbon_composition_resistor

Ruggedly constructed, these brand new carbon composition resistors are made by mixing particles of carbon graphite powder with a binder which is molded and baked into the traditional cylinder shape of carbon comp resistors. Total length of each resistor is 62mm (aprox 2 1/2" long) with body size 3.5mm by 9mm. Non-inductive construction.



Ohm sizes available and $ Price List
Carbon Composition Resistor Kits.

  • Wattage: Available at the popular 1/2 watt rating.
  • Predictable and reliable performance.
  • Ohms: 2.2 ohms to 22M ohms (90 sizes).
  • Tolerance: +/- 10%
  • Operating Temperature Range: -55C to +125C
  • Limiting Element Voltage V: 350 Volts
  • Isolation Voltage V: 500 Volts
  • Improved pulse endurance characteristics compared to carbon-film resistors.
  • Excellent characteristics against high voltage surge current.
  • High insulation to protect against shorts.
  • "Classic" vintage resistor appearance and that tube radio sound of yesteryear.
  • Negative Temperature Coefficient (which means that as the temperature of the resistor increases the resistance decreases).
  • Make/Series: KAMAYA OHM/RC
  • ISO 14001 and 9001 certified and 100% RoHS compliant.
    . .

1 WATT New Production
Carbon Composition Resistors
10% Tolerance

"The Classic Resistor" of Tube Radios & Electronics

carbon_composition_resistor

Ruggedly constructed, these brand new solid rod carbon composition resistors are made by mixing particles of carbon graphite powder with a binder which is molded and baked into the traditional cylinder shape of carbon comp resistors. Total length of each resistor is 72mm (2 3/4") with body size 5.5mm by 15mm. Non-inductive construction with high energy capability and ability to withstand high pulses. For use in high voltage tube radio/amp/electronics restorations and new builds. Also used high power/ strobe lighting and special welding, auto and medical applications.



Ohm sizes available and $ Price List
Carbon Composition Resistor Kits.

  • Brand New Production (NOT New Old Stock/NOS)
  • Wattage: Available at the hard to find but often needed 1 Watt rating.
  • Ohms: Most needed pre WWII and post WWII resistance sizes 10 ohms thru 10M ohms.
  • Tolerance: +/- 10%
  • Operating Temperature Range: -55C to +125C
  • Working Voltage: 500V.
  • Overload Voltage: 1000 volts
  • For High Voltage / High Pulse Applications.
  • Excellent characteristics against high voltage surge current.
  • High insulation to protect against shorts.
  • Black tubular body with wattage, tolerance and ohm resistance value marked on resistor for easy identification.
  • Negative Temperature Coefficient (which means that as the temperature of the resistor increases the resistance decreases).
  • ROHS compliant with Pb free terminations.
  • Made by ISO 9001/2000/14001, UL, CE, SGS certified manufacturer.
    .

Metal Film Resistors

"The Precision Resistor"

carbon_composition_resistor

Constructed of a resistive element of a very thin layer of metal alloy vacuum deposited on a high-thermal conductive ceramic rod. The technology is able to support accurate characteristics over a broad resistance range. Solder plated copper lead wires for easy soldering. Length of each resistor is 60mm (2 1/2") with body size 3.2mm by 9mm.



Ohm sizes available and $ Price List
Precision Metal Film Resistor Kits.

  • Wattage: Available at the popular 1/2 watt rating.
  • Ohms: 10 ohms to 1M ohms.
  • Tolerance: +/- 1%
  • Operating Temperature Range: -55C to +155C
  • Working Voltage: 350V
  • Max. Overload Voltage: 700 volts
  • Temperature Coefficient of Resistance: +/- 50 PPM/C
  • Extremely precise resistor suitable for applications on precise electronics circuits such and test equipment, scientific equipment, Hi-end receivers, tuners, etc.
  • Low temperature coefficient for high stability of resistance as temperature changes.
  • Very quiet and precise.
  • Meet American military specification MIL-R-10509F.
  • ISO 9002, UKAS & BSI certified and 100% RoHS compliant.
    . .

Metal Oxide Resistors (Flame Proof)

High reliability. High Stability. Flame Proof Coating.
A "favourite replacement" for Carbon Composition Resistors.

metal_oxide_capacitors

Resistance element is formed by the oxidation reaction of a vapor or spray of tin chloride or tin-oxide film over a high thermal conductive rod. A flame proof coating is then applied. Total length of each 1 watt resistor is 70mm (over 2 1/2") with body size 4.2mm by 11mm. Total length of each 2W resistor is 80mm (over 3") with body size 5mm by 15mm.

Resistor sizes available and $ Price List
1W & 2W Metal Oxide Resistor Kits .
  • Wattage: Available at 1 Watt and 2 Watt. Replace your 1/2W carbon comp with 1W metal oxide.
  • Ohms: 1 ohm to 500,000 ohms (depending on wattage). For higher ohm values our flame-proof carbon film are recommended.
  • Tolerance: +/- 5%
  • Operating Temperature Range: -55C to +155C
  • Temperature Coefficient of Resistance: +/- 350 PPM/C
  • Working Voltage: 350 Volts Working Voltage. Max overload voltage is 600V and 800V for 1W and 2W respectively.
  • Excellent resistor for use in high power circuits.
  • High stability and high reliability under diverse conditions and high temperatures. Ideal for use in tube electronics.
  • Flame proof coating
  • A favourite replacement for carbon composition resistors. (Replace 1/2W carbon comp with 1W metal oxide).
  • Solder plated copper wire axial leads.
  • ISO 9002, UKAS & BSI certified and 100% RoHS compliant.
    . .

Flame Proof Carbon Film Resistors

Superior Heat resistance. Superior high voltage capabilities.
Popular replacement for Carbon Comp Resistors.

flame_proof_carbon_film

Constructed by vacuum depositing a thin film of carbon over a high thermal conductive ceramic rod. Flame proof coating applied. Total length of each 1 watt resistor is 70mm (over 2 1/2") with body size 4.2mm by 11mm. Total length of each 2 resistor is 80mm (over 3") with body size 5mm by 15mm.

Resistor sizes available and $ Price List

  • Wattage: Available at 1 Watt and 2 Watt.
  • Ohms: 330,000 ohms to 22,000,000 ohms (depending on wattage). For lower ohm values our metal oxide resistors are recommended. For resistance over 22M ohm our metal glaze resistors are available.
  • Tolerance: +/- 5%
  • Operating Temperature Range: -55C to +155C
  • Working Voltage: For 1W the working voltage is 500V and the overload voltage is 1000V. At 2W the working voltage is 750V and the maximum overload voltage if 1500V.
  • Excellent resistor for use in high voltage circuits.
  • High stability, superior resistance to heat (flame-proof) and high reliability in high voltage applications. Ideal for use in tube electronics.
  • A popular replacement for carbon composition resistors.
  • Solder plated copper wire axial leads.
  • ISO 9002, UKAS & BSI certified and 100% RoHS compliant.
    . .

Flame Proof Metal Glaze

Extra High Ohms. Extra High Voltage



These flame proof metal glaze resistors are constructed of a special metal glaze which is a combination of glass and metal that is capable of withstanding very high voltages. This type of capacitor is available at higher ohm values that other types of resistors. Total length of each 1 watt resistor is 70mm (over 2 1/2") with body size 4.2mm by 11mm.

Resistor sizes available and $ Price List.
  • Wattage: Available at 1 Watt.
  • Ohms: Available at 30M ohm, 40M ohm and 50M ohms.
  • Tolerance: +/- 5%
  • Operating Temperature Range: -55C to +155C
  • Temperature Coefficient of Resistance: +/- 200 PPM/C
  • Working Voltage: 1000 Volts Working Voltage. Max overload voltage is 1500V.
  • High stability and high reliability under very high voltage conditions.
  • Flame proof coating
  • Solder plated copper wire axial leads.
  • ISO 9002, UKAS & BSI certified and 100% RoHS compliant.

Power Resistors (Flame Proof)

High Wattage Resistors for use in Power Supply Circuits

power_resistors

5 watt resistors up to 180 ohms and 10 watt resistors up to 470 ohms are wirewound. Higher resistance sizes are made of metal oxide. Metal oxide type is made by depositing a tin oxide on a substrate, resulting in good stability. Wire wound type is constructed by wrapping lengths of high resistance wire over an insulated form. Both types are encased in ceramic (a special type of cement) that is heat and moisture resistant.

Total length of each 5 watt resistor is 62mm with body size 9mm by 10mm by 22mm and lead length 20mm. Total length of each 10W resistor is 110mm (over 4") with body size 9mm by 10mm by 50mm.

Resistor sizes available and $ Price List
Five Watt - Power Resistor Kits .
  • Wattage: Available at 5 Watts and 10 Watts.
  • Ohms: 5 ohm to 25,000 ohms for 5W and 0.5 ohm thru 50,000 ohms for 10W.
  • Tolerance: +/- 5%
  • Operating Temperature Range: -55C to +155C
  • Temperature Coefficient of Resistance: +/- 300 PPM/C
  • Working Voltage: For 5W the Working Voltage is 350V with max overload voltage at 700V. For 10W the WVDC is 750V with an overload voltage of 1500V.
  • Highly heat resistant, moisture resistant and high mechanical strength.
  • Made of non-inflammable materials, so that even if overcurrent flows, there is no self-ignition.
  • Complies with safety standards such as UL Standard, Electrical Apparatus Control Law, etc.
  • Solder plated copper wire axial leads.
  • ISO 9002, UKAS & BSI certified and 100% RoHS compliant.
    . .

$ Price List, Order Form and Terms of Sale

EXCEL Spreadsheet Order-Form

Capacitors for Tube Radios, TVs, Amplifiers and Electronics:

hot Capacitor KITS - for vintage tube radio & amp restorations

Metalized Polypropylene Capacitors - 630 Volt & 1000 Volt Axial Tubular
Metallized Polyester Film Capacitors - 630 Volt & 1000 Volt Axial Tubular
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Metal-Foil Polypropylene Capacitors- 630 Volt Orange Dips
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Metallized Polypropylene Capacitors- 1600 Volt Orange Dips
Mylar Film Capacitor "Bargain Bin" - on sale in Bags of 50

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High Voltage Electrolytic Capacitors - Radial Leads
High Voltage Electrolytic Capacitors - Axial Leads
Silver MICA Capacitors- 500 Volts & 1000 Volts
Ceramic Disc Capacitors - 1600 Volts

X1/Y2 Disc Safety Capacitors - 250VAC
Y2 Film Safety / Interference Suppression Capacitors - 250VAC
X2 Film Safety / Interference Suppression Capacitors - 275VAC

new Resistor KITS - for vintage tube radios & tube based electronics

Heat-Shrink Tubing for Capacitor and Resistor Leads

Capacitor Tips - how to choose capacitors for tube radio restorations

Antique Radio Schematics - JustRadios

E-mail:justradios@yahoo.com

This page was last updated July 2023.