I have tried many makes & variations of this tube, including the CCa and recommend the Matsushita 7DJ8 as an great performer at a reasonable price.
https://www.upscaleaudio.com/products/matsushita-national-pcc88-7dj8?variant=21830008005
https://www.upscaleaudio.com/products/matsushita-national-pcc88-7dj8?variant=21830008005