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Sylvania Pair of 6JS6C NOS Tubes for the Yaesu FT-101 Series Transceivers Tested & Guaranteed

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MPN:
6JS6C
Condition:
New
Shipping:
$8.00 (Fixed Shipping Cost)
  • NOS Sylvania ECG 6JS6C matched pair (2) USA-made New Old Stock in original boxes. Ideal final tubes for Yaesu FT-101 series transceivers. Excellent for vintage ham radio restoration. Fast US shipping.
  • NOS Sylvania ECG 6JS6C matched pair (2) USA-made New Old Stock in original boxes. Ideal final tubes for Yaesu FT-101 series transceivers. Excellent for vintage ham radio restoration. Fast US shipping.
$49.99
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Description

Sylvania Pair of 6JS6C NOS Tubes for the Yaesu FT-101 Series Transceivers Tested & Guaranteed

 This tube and all others, has been tested on a B&K Dynaquick 700 Tube tester. It shows grid full emission.

 
Sylvania 6JS6C Matched Pair (NOS/NIB, ECG series, Made in USA) — These are premium American-made beam power pentode sweep tubes in original Sylvania ECG boxes. Sylvania (part of Philips/ECG) produced high-quality versions known for solid construction and good performance as RF finals.
 
 
Amateur Radios That Use 6JS6C TubesThe Yaesu FT-101 series (FT-101, FT-101B, FT-101E, FT-101EE, FT-101EX, etc.) primarily use a pair (2) of 6JS6C final tubes. These deliver approximately 100–130W PEP output on HF bands. Other Yaesu models and some linear amplifiers also used this tube type.
 
 

The 6JS6C is a vintage vacuum tube classified as a compactron beam power pentode. It was originally designed for use as a horizontal deflection amplifier (commonly called a "sweep tube") in color television receivers during the 1960s and 1970s. These tubes are known for their rugged construction, high power handling, and low interelectrode capacitances, which make them suitable for RF amplification in amateur radio applications despite their TV origins. They were produced by major manufacturers like General Electric (GE), RCA, Sylvania, and Raytheon

Category

Parameter

Value

Notes

Heater/Filament

Voltage

6.3 V

Series-parallel operation possible.
 

Current

2.25 A

  

Maximum Ratings

Plate Voltage

990 V

  
 

Plate Dissipation

30 W

  
 

Screen Voltage

220 V

  
 

Grid 2 Voltage

220 V

  
 

Grid 1 Voltage (negative)

-100 V

  

Capacitances

Grid 1 to Plate

0.7 pF

Low values ideal for RF use.
 

Input (Grid 1)

10.5 pF

  
 

Output (Plate)

6.0 pF

  

Mechanical

Base Type

Duodecar (12-pin Compactron, B12C)

Glass envelope.
 

Mounting Position

Horizontal or vertical

  
 

Length

~4.5 inches

Approximate; varies by brand.
 

Diameter

~1.5 inches

  

Typical Operation (as Horizontal Deflection Amplifier):

  • Plate Voltage: 800–1000 V
  • Screen Voltage: 200–250 V
  • Grid 1 Bias: -20 to -50 V
  • Peak Cathode Current: Up to 1.0 A
  • These ratings allow for high-efficiency operation in pulsed or Class C RF amplifiers, common in ham rigs.

exclusively associated with the Yaesu FT-101 series—no other major transceiver models are documented as using it in their finals. (Some linear amplifiers, like certain Ameritron models, used similar sweep tubes such as 6JM6, but not the 6JS6C specifically.)Yaesu FT-101 Series Overview  This line of HF SSB/CW/AM transceivers (80–10 meters, plus optional 6 meters in some variants) was produced from 1971–1980 and remains popular for restoration due to its modular design and performance. The 6JS6C tubes form the push-pull final amplifier stage, driven by a 12BY7A pentode, delivering:

  • Output Power: ~130 W PEP SSB, 90 W CW, 40 W AM (with two tubes).
  • Pi-Network Matching: Transforms the tubes' ~3000 Ω output impedance to 50 Ω antenna impedance.
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