Other

The 813 beam power tube was very popular with amateur radio operators following WW II. The tube remained a staple of amateur radio until single sideband became a popular operating mode in the late 1950's and early 1960's. Featuring a graphite plate with an ICAS dissipation rating of 125 watts the tube was very economical and a pair could provide legal limit operation (1 kilowatt input) on CW or AM.

New Old Stock * No longer available for export
MFR:  National Union
SKU: 813-NU

Designed for use in plate pulsed operation as a power amplifier, oscillator and frequency multiplier in compact mobile aircraft equipment.
New old stock * No longer available for export.
MFR: RCA
SKU: 4062A

425W pulse output at 1.7GHz. 5675 specially selected and aged to HP specs.
New old stock * No longer available for export.
MFR: RCA
SKU: 4042

For use in cathode drive service up to 3000mc.
MFR: RCA
SKU: 4043

Designed primarily for use as an RF amplifier in radar receivers. 10db of noise at 1Ghz.
New old stock * No longer available for export.
MFR: RCA
SKU: 446A

Designed to be used in class A and class C amplifiers and is tested as a frequency doubler at an output frequency of 400Mc.
New old stock * No longer available for export.
MFR: 5851
SKU: Tung Sol

Removed from Military Equipment - Like new condition
Used * No longer available for export
MFR: Amperex
SKU: 4CX250FG-AMP-P
90 day limited warranty

New Old Stock * New In the Box * No longer available for export
MFR: General Electric Company
Made in West Germany
SKU: 6KG6AMP-GE-GER

New Old Stock * New In the Box * No longer available for export
MFR: Sylvania 
SKU: 6KG6-EL509-SYL