Restoration Commences on 1947 RCA Victor 721TCS

[Penthode]

Here is a shot of the grid dip meter coupled to the tuner mixer tube for the frequency response check. I actually rested the coil on the tube as I swung the calibrated dial. Accuracy is reasonable and the trap null was indicated on the dial at 21.25 MHz. I also see the original green sealing lacquer still on the adjustments which suggests it has never been touched.