Sylvania VT-52 Pair Vintage Vacuum Tubes (SR3#11)

This is a nice pair Sylvania VT-52 tubes from my private collection.

Testing better than NOS and in excellent physical condition.

Details

Black Bases

Black Plates

Spring Held Filaments

O-Ring Support

Bottom D-Getter

Test Results

Fully Tested on my calibrated Philco 9100.

They were tested as 45’s at 6.3V heater voltage.

Tube1: 2190 micro-mhos 38.8 mA

Tube2: 1900 micro-mhos 37.6 mA

Minimum 1480 micro-mhos

New  1850 micro-mhos

NOTE

There is no setting on my Philco 9100 tester for the VT-52 tubes.

I used a heater voltage of 6.3V not 7.0V.