1 low noise tube) 5963 RCA Hewlett Packard gray plates tests like new 1961
10.8ma Gm=2400
11.0ma Gm=2400
(5963=computer rated 12AU7)
 1-2% section balance "Pin It")
 1-2% section balance&Category=service&ImageURL=http://cdn.shopify.com/s/files/1/0333/7633/products/1_80ddf4c6-6fdd-4252-9979-90ac91435837.jpg?v=1581921473){kind=link}