New Matched Pair (2) Sovtek 5U4G Vacuum Tubes

New Matched Pair of Sovtek 5U4G Vacuum Tubes

The only modern production 5U4G in existence. The 5U4G features a fat / shouldered bottle for superior heat dissipation and is the coolest looking 5U4 on the planet! The 5U4G is a suitable replacement for any 5U4GB, 5U4GA or GZ34 but make sure your amplifier has room for the larger bottle.

Testing and/or Matching

At VIVA TUBES, all of our customers get the same high standard of testing and matching. Some sellers charge more for premium matches but we believe all of our customers should get the same level of quality and service. 

Tubes are tested and/or matched at full operating voltage with regulated power supply on a Maxi Matcher tester for general mutual transconductance (Gm). In addition, power tubes are tested/matched by plate current (Ip) and preamp tubes are tested/matched by gain. Rectifier tubes will be tested for emissions on a calibrated military grade tube tester. 

Our goal is to match within 5% with an upper limit of 15% (15% is the industry limit to consider a set).

Hand written test data included.

Note that we do offer a few models which are tested & matched at the factory. They will be matched by the same parameters (Ip & Gm) but to the manufacturer's standards. Factory testing will be indicated in the item title and description. 

Guarantee

We offer a minimum 90 day guarantee covering functional defects - including noise unless otherwise stated. The guarantee period begins the day you receive your order.