3CPX1500A7 Ceramic/Metal High-Mu Power Triode

Description

Platinum Tubes
3CPX1500A7 Ceramic/Metal High-Mu Power Triode
The 3CPX1500A7 is a rugged high-mu power
triode, designed with beam-forming cathode and control grid geometry to allow the simplicity of design and circuit advantages of a triode with the gain of a tetrode. The tube is intended for pulse modulator or pulse regulator service. The external anode may be forced-air cooled. Or, for increased
high voltage holdoff, the tube may be immersed in an insulating liquid, which is also used to cool the tube. This tube may be used in a grid or plate pulsed RF application where high peak power is required.
Characteristics
Plate Dissipation (Max.) 1,500 Watts
Screen Dissipation (Max.) ---
Grid Dissipation (Max.) 25 Watts
Frequency for Max. rating (CW) 250 MHz
Amplification Factor 200
Filament/Cathode Oxide Coated
Voltage 5.5 Volts
Current 11.2 Amps
Capacitance Grounded Cathode
Input 38.5 pf
Output 0.2 pf
Feedthrough 10 pf
Capacitance ---
Input --- pf
Output --- pf
Feedthrough --- pf
Cooling Liquid or Air
Base Special 7 pin
Air Socket SK-2200
Air Chimney SK-2216
Boiler ---
Length 4.02 in; 102. mm
Diameter 3.38 in; 86 mm
Weight 26.02 oz; 0.737 g
New Current Production
Product is manufactured by affiliated or unaffiliated manufacturers in various countries. Country of origin is printed on the tube.
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.