Catalog
Showing 31–60 of 129 items
3CX800A7 Matched Pair
The Penta Laboratories 3CX800A7 tubes for sale are compact power triodes intended for use as cathode-driven Class AB2 or Class B amplifiers in rf applications, including the VHF band. 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 3CX800A7 drive power low for a tube of this power capacity. A single 3CX800A7 will deliver 750 watts PEP and 750 watts key-down CW output power to 350 MHz. The 3CX800A7 tubes for sale are useful to 450 MHz. The anode is forced-air cooled for 800 watts of dissipation.
$1,900.00
-
4CX1500B
The 4CX1500B/8660 tube is radial beam tetrode which is rated for 1500 watts maximum plate dissipation. Construction is metal/ceramic, and cooling is via forced-air. The high current, low voltage and low distortion design of the 4CX1500B/8660 makes it ideally suited for use in audio amplifier or Class AB1 RF linear amplifier applications. In addition, the 4CX1500B/8660 exhibits exceptionally low intermodulation distortion and low grid interception for a tube of its power output.
$994.99
4CX20000A
4CX20000A/8990 is a high-performance ceramic/metal power tetrode designed for audio and radio frequency applications. It is particularly well-suited for use in VHF FM broadcast transmitters in the Band II 88-108 MHz frequency range.
$3,994.99-
-
-
4CX20000D
4CX20,000D/9015 is a ceramic/-
metal VHF power tetrode intended for use as
a RF amplifier up to 110 MHz. It is particular –
ly recommended for use in the 88-108 MHz
FM band. It features an electromechanical
structure which provides high RF operating
efficiency and low RF losses. The 4CX-
20,000D has a gain of up to 20 dB in FM
broad-cast service. The anode is rated for 20
kilowatts of dissipation with forced-air cool-
ing and incorporates a highly efficient cooler
of new design, which significantly reduces air
pressure and flow requirements and produc-
es low acoustical noise.$3,994.99 
4CX20000E
The 4CX20,000E is a ceramic/metal power
tet-rode vacuum tube intended for use as a VHF power
amplifier. It features a type of internal
mechanical structure, which results in rf oper-
ating efficiency. Low rf losses in this structure
permit operation at full ratings to 110 MHz.
The 4CX20,000E provides high gain in FM
broadcast service and is also recommended
for rf linear power amplifier service, including
IBOC digital transmission. The anode is
rated for 20 kilowatts of dissipation with
forced-air cooling and incorporates a com –
pact, highly efficient cooler of new design.$3,994.99
4CX250B
The Penta 4CX250B amplifier tube is a forced-air cooled, 250-watt plate dissipation, external anode, ceramic and metal radial beam tetrode. The superior construction of the 4CX250B makes it ideal for use as a grid driven RF amplifier or oscillator, or an AF power amplifier or modulator.
-
572B
The Penta Laboratories is a power triode designed for use as a RF Oscillator, RF Power Amplifier and audio frequency modulator. The 572B is a direct replacement for the 811A, but has a graphite anode for increased performance and reliability.
$89.95
572B Matched Pair
The Penta Laboratories is a power triode designed for use as a RF Oscillator, RF Power Amplifier and audio frequency modulator. The 572B is a direct replacement for the 811A, but has a graphite anode for increased performance and reliability.
$179.90
572B Matched Quad
The Penta Laboratories is a power triode designed for use as a RF Oscillator, RF Power Amplifier and audio frequency modulator. The 572B is a direct replacement for the 811A, but has a graphite anode for increased performance and reliability.
$359.80
572B Matched Trio
The Penta Laboratories 572B audio tube for sale is a power triode designed for use as a RF Oscillator, RF Power Amplifier and audio frequency modulator. The 572B audio tube amplifier pack is a direct replacement for the 811A, but has a graphite anode for increased performance and reliability.
$269.85
Showing 31–60 of 129 items