5670 (2C51) RCA NOS NIB Audio Receiver Pre-Amplifier Vacuum Tubes. Flat black plates, two spacers, isolation plates, halo wire getter frames and top getter flashes. Please review the photos for more detail. Excellent strong balanced test results for Gm. For Gm, 26 is the suggested 60% reject value.
For reference we use a calibrated Military TV-7 Tester. The item "5670 (2C51) RCA NOS NIB Audio Receiver Pre-Amplifier Vacuum Tubes Tested Pair" is in sale since Tuesday, December 21, 2021. This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Parts & Accessories\Vintage Tubes & Tube Sockets". The seller is "chukv" and is located in Westwood, Massachusetts. This item can be shipped worldwide.