Up with the Tung-Sol 6550 reissues running at 100mA

Dark close-up of a SED KT88

Dark close-up of Sovtek 5AR4, JAN 12AT7, and SED KT88s

Running with Sovtek 5AR4, JAN 12AT7, and SED KT88s

Assembled view of the back

Assembled with Sovtek 5AR4, JAN 12AT7, and SED KT88s

Assembled with Sovtek 5AR4, JAN 12AT7, and SED KT88s

Assembled with Sovtek 5AR4, JAN 12AT7, and SED KT88s

Dark close-up of JJ GZ34, ECC81, and 6L6GCs

Running with JJ GZ34, ECC81, and 6L6GCs

Assembled with JJ GZ34, ECC81, and 6L6GCs

Assembled with JJ GZ34, ECC81, and 6L6GCs

Assembled with JJ GZ34, ECC81, and 6L6GCs

Assembled with JJ GZ34, ECC81, and 6L6GCs

Test fit with large output tubes

All components being test fitted to check for clearance issues

All components being test fitted to check for clearance issues

All components being test fitted to check for clearance issues

Tight fit on the 12×10 chassis

Testing the amp on a breadboard

PCB

Plate structure of the SED KT88

Plate structure of the Electroharmonix KT90

Plate structure of the Tung-Sol 6550 reissue