Carl wrote:
"I recently landed a nice NC-300 at a BIN of $100 and it had already been on for 5 days. When it arrived it included the XCU-300 plus a XCU-27 calibrator and a clean original manual."
Lemme guess, you'll pull the 6BA7 and its circuitry, then you'll Pullenize with a 6ES8.
Drew