Transmitting Tubes

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4-400AX / 8438A Amperex Transmit Tube (Pull)

In Stock

$399.91

QB4 / 1100GA, Graphite Anold
Used * No longer available for export
MFR: Amperex
SKU: 4-400AX-AMP-P

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7609 Amperex Ceramic/Glass Transmitting Tube (Pull)

In Stock

$59.91

Ceramic/Glass Tetrode
HD version of 4X150D
Clean Used * No longer available for export
MFR: Amperex
SKU: 7609-AMP-P

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4043 RCA High Mu Triode Tube (NOS/NIB)

In Stock

$79.91

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

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4042 RCA High Mu Triode Tube (NOS/NIB)

In Stock

$79.91

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

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813 National Union Transmitting Tube (NOS)

In Stock

$79.91

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

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