• GU 74b tetrode 4CX800/GU74b tube. NOS (New Old Stock)
We sell NOS (New Old Stock) GU-74b or 4CX800 tubes.
Pair of matched tubes available.

ONE YEAR WARRANTY FROM WHEN YOU BUY THE TUBE


SPECIAL FOR A LIMITED TIME:  DUE TO A RECENT BULK PURCHASE, WE ARE OFFERING THESE TESTED TUBES AT A DISCOUNT WHILE SUPPLIES LAST.

REGULAR PRICE FOR SINGLE TUBE: $600       SALE PRICE:  $500

 
We test thoroughly all our tubes before shipping them and pick matched pairs after testing the tube structure and its RF performance in our RF Lab.
 
 

Test Bench


Our RF lab's test bench consists of a Hi Pot tester, the M-100DC and a modified Acom 1011.
 



The modified ACOM 1011 and the HI Pot tester M-100DC with the tetrode connections module on top.
 

View of the Hi Pot tester M-100DC and the tetrode connections module. This instrument can generate up to 5000 V to test the tube for shorts and other parameters.
 
 


The Report

 
Sample of a real test report for a GU-74b tetrode.
 
 

GU 74b tetrode 4CX800/GU74b tube. NOS (New Old Stock)

  • Product Code: GU-74B
  • Availability: In Stock
  • $500.00


Related Products

GU 74b Matched pair of 4CX800 or GU74b tetrode tubes. NOS (New Old Stock)

GU 74b Matched pair of 4CX800 or GU74b tetrode tubes. NOS (New Old Stock)

Matched pair of NOS (New Old Stock) GU-74b or 4CX800 tubes. Single tubes available  - click ..

$1,000.00

GU74b Tube Testing

GU74b Tube Testing

Your tube get dirty and you think it overheated?They may even look  fine, but you don't get the..

$35.00

Tags: gu-74b, gu74b, hf amp, hf amplifier, acom, amplifier, 6m amplifier, 6 m amplifier, amp, solid state amplifier, power amplifier, acom-600, qsk amplifier, acom600, acom 600, acom1000, acom-600s, acom-600-s, acom 1000, acom-1010, acom-1000, acom-1000s, acom 1010, acom1010, acom-2000, acom2000, acom-1010s, acom 2000, gu-74-b, GU-74B, 4CX800, 4cX800.4Cx800, GU74B, GU-74B, Gu74B, Gu-74B, Gu-74b, Tube, tube.TUBE