RCA

RCA 12JB6A NOS Vacuum Tubes Set of 3, Tested 100%, Original Boxes, for Drake TR-3

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MPN:: 12JB6A
Condition:: New
Shipping:: $8.00 (Fixed Shipping Cost)

$49.99

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Description

Description

RCA 12JB6A NOS Vacuum Tubes Set of 3, Tested 100%, Original Boxes, for Drake TR-3

These NOS tubes were purchased on ebay 01-17-2011 for $64.63. The original receipt is included.

They were never needed so I am selling them for less than was paid for them.

These Tubes have been tested on a Dyna-Quick Model 700 Dynamic Mutual Conductance Tube Tester. All NOS tubes I sell measure 100 % Grid Emission.

The tube in the photograph is the actual Tube in this listing.

The RCA 12JB6A is a 12.6-volt filament version of the 6JB6A beam power pentode (Novar 9-pin base with anode top cap). It was originally a TV horizontal sweep/deflection tube but became popular as an RF power amplifier tube in amateur radio.

Key Specifications

Type: Beam power pentode
Filament: 12.6 V, 0.6 A
Plate Dissipation: 17.5 W per tube
Base: 9-pin Novar (Compactron-style) with top cap
Condition: New Old Stock (NOS), tested 100% on Dynascan tube tester – excellent strong emission

Your set of 3 RCA tubes in original boxes is ideal as a complete final amplifier replacement set.Amateur Radio Equipment That Uses the 12JB6AThese tubes are primarily used as the final amplifier tubes in:

Drake TR-3 HF transceiver — the most common and famous application (uses a set of exactly 3 tubes).
Some variants or related Drake models
Certain mobile linears and transmitters (e.g., Lafayette HA-250 uses 2 tubes; some P&H amplifiers used more)

A fresh set of strong 12JB6A tubes typically restores a Drake TR-3 to 150–300 W PEP output depending on tuning, loading, and band.

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