Check the listing for details. 3CX1500A7 Penta Laboratories Ceramic/Metal High-Mu Power Triode. Condition: New. Listed at 1249.99 USD. Platinum Tubes Penta Laboratories 3CX1500A7 Ceramic/Metal High-Mu Power Triode The 3CPX1500A7 is a rugged ceramic and metal power triode designed for use as a cathode driven Class AB2 or Class B amplifier in audio or rf applications including the VHF band, or as a cathode driven plate modulated Class C rf amplifier. As a linear amplifier, high power gain may be obtained without sacrifice of low intermodulation distortion characteristics. Low grid interception and high amplification factor combine to make the 3CX1500A7 drive power requirements exceptionally low for a tube of this power capacity. Characteristics Plate Dissipation (Max.) 1,500 Watts Screen Dissipation (Max.) --- Grid Dissipation (Max.) 20 Watts Frequency for Max. rating (CW) 250 MHz Amplification Factor(average) 200 Cathode Oxide Coated, Unipotential Voltage 5.0 Volts Current 10.5 Amps Capacitance Grounded Cathode Input 38.5 pf Output 0.1 pf Feedthrough 10 pf Capacitance Grounded Grid Input 38.5 pf Output 10.0 pf Feedthrough 0.1 pf Cooling Forced Air Coaxial Air Socket --- Air Chimney --- Boiler --- Length 4.02 in Diameter 3.38 in Weight 25 oz New Current ProductionOur Tubes are covered by a standard 12 Month/1,000 Hour Warranty Please message us with any concerns or questions about your order, Thank you! WHY PLATINUM TUBES? Once purchased and received by Platinum Tubes, vacuum tubes undergo exacting quality control measures to further assure reliable, sonically acceptable performance. Each power tube is then tested and graded for technical characteristics specified by platinum tubes engineers. Only after a tube successfully passes these exacting challenges is it labeled and put into stock to be sold. Tubes not meeting these criteria are rejected to the supplier or disposed of. Average tube life will depend on several parameters: product type, how the product is installed, loudspeaker efficiency, room size and acoustic damping, listening habits or average sound pressure levels, A.C. line stability and purity, and other circumstances. Generally, preamplifier tubes last up to 5,000 hours, while power amplifier output tubes will last up to 3,000 hours. Near the end of their useful sonic life, aging vacuum tubes may degrade the sonic character of the product(s) they are used in. The sound may become somewhat dry and lifeless, with a noticeable decrease in harmonic richness or bloom. Bass response may be diminished, and musical dynamics may flatten out or compress. Toward the very end of their service life, tubes may become noisy, noticeable as a slight rushing sound or rustling noise. It is far better to replace vacuum tubes prior to the end of their service life, before severe sonic degradation or outright failure occurs. Running vacuum tubes into failure may damage to other internal components and cause needless repair expense. Factors which can shorten tube life include inadequate ventilation, overdriving loudspeakers at continuously high volume levels, severely fluctuating A.C. line conditions (e.g. sagging line voltage during summer peaks of air-conditioning demand), or severe interference pulses or electromagnetic interference. *In the event of a failure, tube(s) must be sent back to us at the buyer's expense. We will expedite any replacements after testing the tube internally at our expense.